#!/usr/bin/env python3

__author__ = "Peter Molnar"
__copyright__ = "Copyright 2017-2019, Peter Molnar"
__license__ = "apache-2.0"
__maintainer__ = "Peter Molnar"
__email__ = "mail@petermolnar.net"

import glob
import os
import time
import re
import asyncio
import sqlite3
import json

from shutil import copy2 as cp
from urllib.parse import urlparse
from collections import namedtuple
import logging

import arrow
import langdetect
import wand.image
import filetype
import jinja2
import yaml

import frontmatter
from feedgen.feed import FeedGenerator
from feedgen.entry import FeedEntry

from slugify import slugify
import requests

from pandoc import PandocMD2HTML, PandocMD2TXT, PandocHTML2TXT
from meta import Exif
import settings
import keys
import wayback

logger = logging.getLogger("NASG")

MarkdownImage = namedtuple(
    "MarkdownImage", ["match", "alt", "fname", "title", "css"]
)

RE_MDIMG = re.compile(
    r"(?P<match>!\[(?P<alt>[^\]]+)?\]\((?P<fname>[^\s\]]+)"
    r"(?:\s[\'\"](?P<title>[^\"\']+)[\'\"])?\)(?:{(?P<css>[^\}]+)\})?)",
    re.IGNORECASE,
)

RE_CODE = re.compile(r"^(?:[~`]{3,4}).+$", re.MULTILINE)

RE_PRECODE = re.compile(r'<pre class="([^"]+)"><code>')

RE_MYURL = re.compile(
    r'(^(%s[^"]+)$|"(%s[^"]+)")'
    % (settings.site.url, settings.site.url)
)


def mtime(path):
    """ return seconds level mtime or 0 (chomp microsecs) """
    if os.path.exists(path):
        return int(os.path.getmtime(path))
    return 0


def utfyamldump(data):
    """ dump YAML with actual UTF-8 chars """
    return yaml.dump(
        data, default_flow_style=False, indent=4, allow_unicode=True
    )


def url2slug(url, limit=200):
    """ convert URL to max 200 char ASCII string """
    url = re.sub(r"^https?://(?:www)?", "", url)
    url = slugify(url, only_ascii=True, lower=True)
    return url[:limit]


def rfc3339todt(rfc3339):
    """ nice dates for humans """
    t = arrow.get(rfc3339).format("YYYY-MM-DD HH:mm ZZZ")
    return str(t)


def extractlicense(url):
    """ extract license name """
    n, e = os.path.splitext(os.path.basename(url))
    return n.upper()


def relurl(text, baseurl=None):
    if not baseurl:
        baseurl = settings.site.url
    for match, standalone, href in RE_MYURL.findall(text):
        needsquotes = False
        if len(href):
            needsquotes = True
            url = href
        else:
            url = standalone

        r = os.path.relpath(url, baseurl)
        if url.endswith("/") and not r.endswith("/"):
            r = "%s/%s" % (r, settings.filenames.html)
        if needsquotes:
            r = '"%s"' % r
        logger.debug("RELURL: %s => %s (base: %s)", match, r, baseurl)
        text = text.replace(match, r)
    return text


def writepath(fpath, content, mtime=0):
    """ f.write with extras """
    d = os.path.dirname(fpath)
    if not os.path.isdir(d):
        logger.debug("creating directory tree %s", d)
        os.makedirs(d)
    if isinstance(content, str):
        mode = "wt"
    else:
        mode = "wb"
    with open(fpath, mode) as f:
        logger.info("writing file %s", fpath)
        f.write(content)
        if mtime > 0:
            os.utime(fpath, (mtime, mtime))


def maybe_copy(source, target):
    """ copy only if target mtime is smaller, than source mtime """
    if os.path.exists(target) and mtime(source) <= mtime(target):
        return
    logger.info("copying '%s' to '%s'", source, target)
    cp(source, target)


def extractdomain(url):
    url = urlparse(url)
    return url.hostname


J2 = jinja2.Environment(
    loader=jinja2.FileSystemLoader(
        searchpath=settings.paths.get("tmpl")
    ),
    lstrip_blocks=True,
    trim_blocks=True,
)
J2.filters["relurl"] = relurl
J2.filters["url2slug"] = url2slug
J2.filters["printdate"] = rfc3339todt
J2.filters["extractlicense"] = extractlicense
J2.filters["extractdomain"] = extractdomain


class cached_property(object):
    """ extermely simple cached_property decorator:
    whenever something is called as @cached_property, on first run, the
    result is calculated, then the class method is overwritten to be
    a property, contaning the result from the method
    """

    def __init__(self, method, name=None):
        self.method = method
        self.name = name or method.__name__

    def __get__(self, inst, cls):
        if inst is None:
            return self
        result = self.method(inst)
        setattr(inst, self.name, result)
        return result


class AQ:
    """ Async queue which starts execution right on population """

    def __init__(self):
        self.loop = asyncio.get_event_loop()
        self.queue = asyncio.Queue(loop=self.loop)

    def put(self, task):
        self.queue.put(asyncio.ensure_future(task))

    async def consume(self):
        while not self.queue.empty():
            item = await self.queue.get()
            self.queue.task_done()
        # asyncio.gather() ?

    def run(self):
        consumer = asyncio.ensure_future(self.consume())
        self.loop.run_until_complete(consumer)


class Gone(object):
    """
    Gone object for delete entries
    """

    def __init__(self, fpath):
        self.fpath = fpath

    @property
    def mtime(self):
        return mtime(self.fpath)

    @property
    def exists(self):
        if (
            os.path.exists(self.renderfile)
            and mtime(self.renderfile) >= self.mtime
        ):
            return True
        return False

    @property
    def renderdir(self):
        return os.path.join(settings.paths.get("build"), self.source)

    @property
    def renderfile(self):
        return os.path.join(self.renderdir, settings.filenames.html)

    @property
    def source(self):
        source, fext = os.path.splitext(os.path.basename(self.fpath))
        return source

    @property
    def template(self):
        return "%s.j2.html" % (self.__class__.__name__)

    @property
    def tmplvars(self):
        return {"source": self.source}

    async def render(self):
        if self.exists:
            return
        logger.info(
            "rendering %s to %s", self.__class__, self.renderfile
        )
        writepath(
            self.renderfile, J2.get_template(self.template).render()
        )


class FediverseStats(object):
    def __init__(self, postcount=0, commentcount=0):
        self.postcount = postcount
        self.commentcount = commentcount
        self.nodeinfo_json = "nodeinfo.json"

    async def render(self):
        writepath(
            os.path.join(
                settings.paths.build, ".well-known", "nodeinfo"
            ),
            json.dumps(self.metanodeinfo, indent=4, ensure_ascii=False),
        )
        writepath(
            os.path.join(
                settings.paths.build, ".well-known", self.nodeinfo_json
            ),
            json.dumps(self.nodeinfo, indent=4, ensure_ascii=False),
        )

    @property
    def metanodeinfo(self):
        return {
            "links": [
                {
                    "href": f"{settings.site.url}/.well-known/{self.nodeinfo_json}",
                    "rel": "http://nodeinfo.diaspora.software/ns/schema/2.0",
                }
            ]
        }

    @property
    def nodeinfo(self):
        return {
            "metadata": {
                "nodeName": settings.site.name,
                "software": {
                    "homepage": "https://github.com/petermolnar/nasg",
                    "github": "https://github.com/petermolnar/nasg",
                    "follow": f"{settings.site.url}",
                },
            },
            "openRegistrations": False,
            "protocols": ["webmention", "activitypub"],
            "services": {
                "inbound": [],
                "outbound": ["github", "flickr"],
            },
            "software": {
                "name": "nasg",
                "version": "6.6"
            },
            "usage": {
                "localPosts": self.postcount,
                "localComments": self.commentcount,
                "users": {
                    "total": 1,
                    "activeHalfyear": 1,
                    "activeMonth": 1,
                },
            },
            "version": "2.0",
        }


class Redirect(Gone):
    """
    Redirect object for entries that moved
    """

    @cached_property
    def target(self):
        target = ""
        with open(self.fpath, "rt") as f:
            target = f.read().strip()
        return target

    @property
    def tmplvars(self):
        return {"source": self.source, "target": self.target}


class MarkdownDoc(object):
    """ Base class for anything that is stored as .md """

    def __init__(self, fpath):
        self.fpath = fpath

    @property
    def mtime(self):
        return mtime(self.fpath)

    @property
    def dt(self):
        """ returns an arrow object; tries to get the published date of the
        markdown doc. The pubdate can be in the future, which is why it's
        done the way it is """
        maybe = arrow.get(self.mtime)
        for key in ["published", "date"]:
            t = self.meta.get(key, None)
            if t and "null" != t:
                try:
                    t = arrow.get(t)
                    if t.timestamp > maybe.timestamp:
                        maybe = t
                except Exception as e:
                    logger.error(
                        "failed to parse date: %s for key %s in %s",
                        t,
                        key,
                        self.fpath,
                    )
                    continue
        return maybe

    @cached_property
    def _parsed(self):
        with open(self.fpath, mode="rt") as f:
            logger.debug("parsing YAML+MD file %s", self.fpath)
            meta, txt = frontmatter.parse(f.read())
        return (meta, txt)

    @cached_property
    def meta(self):
        return self._parsed[0]

    @cached_property
    def content(self):
        maybe = self._parsed[1]
        if not maybe or not len(maybe):
            maybe = str("")
        return maybe

    @cached_property
    def html_content(self):
        if not len(self.content):
            return self.content

        c = self.content
        if hasattr(self, "images") and len(self.images):
            for match, img in self.images.items():
                if self.is_photo:
                    c = c.replace(match, "")
                else:
                    c = c.replace(match, str(img))
        c = str(PandocMD2HTML(c))
        c = RE_PRECODE.sub(
            '<pre><code lang="\g<1>" class="language-\g<1>">', c
        )
        return c

    @cached_property
    def txt_content(self):
        if not len(self.content):
            return ""
        else:
            return PandocMD2TXT(self.content)


class Comment(MarkdownDoc):
    @property
    def dt(self):
        maybe = self.meta.get("date")
        if not maybe or maybe == "null":
            maybe = int(os.path.basename(self.fpath).split("-")[0])
        dt = arrow.get(maybe)
        if self.mtime != dt.timestamp:
            os.utime(self.fpath, (dt.timestamp, dt.timestamp))
        return dt

    @property
    def source(self):
        return self.meta.get("source")

    @property
    def author(self):
        r = {
            "@context": "http://schema.org",
            "@type": "Person",
            "name": urlparse(self.source).hostname,
            "url": self.source,
        }
        author = self.meta.get("author")
        if not author:
            return r
        if "name" in author:
            r.update({"name": self.meta.get("author").get("name")})
        elif "url" in author:
            r.update(
                {
                    "name": urlparse(
                        self.meta.get("author").get("url")
                    ).hostname
                }
            )
        return r

    @property
    def type(self):
        return self.meta.get("type", "webmention")

    @cached_property
    def jsonld(self):
        r = {
            "@context": "http://schema.org",
            "@type": "Comment",
            "author": self.author,
            "url": self.source,
            "discussionUrl": self.meta.get("target"),
            "datePublished": str(self.dt),
            "disambiguatingDescription": self.type,
        }
        return r


class WebImage(object):
    def __init__(self, fpath, mdimg, parent):
        logger.debug("loading image: %s", fpath)
        self.mdimg = mdimg
        self.fpath = fpath
        self.parent = parent
        self.mtime = mtime(self.fpath)
        self.name = os.path.basename(self.fpath)
        self.fname, self.fext = os.path.splitext(self.name)
        self.resized_images = [
            (k, self.Resized(self, k))
            for k in settings.photo.get("sizes").keys()
            if k < max(self.width, self.height)
        ]
        if not len(self.resized_images):
            self.resized_images.append(
                (
                    max(self.width, self.height),
                    self.Resized(self, max(self.width, self.height)),
                )
            )

    @property
    def is_mainimg(self):
        if self.fname == self.parent.name:
            return True
        return False

    @property
    def jsonld(self):
        r = {
            "@context": "http://schema.org",
            "@type": "ImageObject",
            "url": self.href,
            "image": self.href,
            "thumbnail": settings.nameddict(
                {
                    "@context": "http://schema.org",
                    "@type": "ImageObject",
                    "url": self.src,
                    "width": self.displayed.width,
                    "height": self.displayed.height,
                }
            ),
            "name": self.name,
            "encodingFormat": self.mime_type,
            "contentSize": self.mime_size,
            "width": self.linked.width,
            "height": self.linked.height,
            "dateCreated": self.exif.get("CreateDate"),
            "exifData": [],
            "caption": self.caption,
            "headline": self.title,
            "representativeOfPage": False,
            # "text": str(self)
        }
        for k, v in self.exif.items():
            r["exifData"].append(
                {"@type": "PropertyValue", "name": k, "value": v}
            )
        if self.is_photo:
            licence = settings.licence["_default"]
            r.update(
                {
                    "creator": settings.author,
                    "copyrightHolder": settings.author,
                    "license": f"https://spdx.org/licenses/{licence}.html",
                }
            )
        if self.is_mainimg:
            r.update({"representativeOfPage": True})

        if (
            self.exif["GPSLatitude"] != 0
            and self.exif["GPSLongitude"] != 0
        ):
            r.update(
                {
                    "locationCreated": settings.nameddict(
                        {
                            "@context": "http://schema.org",
                            "@type": "Place",
                            "geo": settings.nameddict(
                                {
                                    "@context": "http://schema.org",
                                    "@type": "GeoCoordinates",
                                    "latitude": round(
                                        self.exif["GPSLatitude"], 4
                                    ),
                                    "longitude": round(
                                        self.exif["GPSLongitude"], 4
                                    ),
                                }
                            ),
                        }
                    )
                }
            )
        return settings.nameddict(r)

    def __str__(self):
        if len(self.mdimg.css):
            return self.mdimg.match
        tmpl = J2.get_template("%s.j2.html" % (self.__class__.__name__))
        return tmpl.render(self.jsonld)

    @cached_property
    def meta(self):
        return Exif(self.fpath)

    @property
    def caption(self):
        if len(self.mdimg.alt):
            return self.mdimg.alt
        else:
            return self.meta.get("Description", "")

    @property
    def title(self):
        if len(self.mdimg.title):
            return self.mdimg.title
        else:
            return self.meta.get("Headline", self.fname)

    @property
    def tags(self):
        return list(set(self.meta.get("Subject", [])))

    @property
    def published(self):
        return arrow.get(
            self.meta.get("ReleaseDate", self.meta.get("ModifyDate"))
        )

    @property
    def width(self):
        return int(self.meta.get("ImageWidth"))

    @property
    def height(self):
        return int(self.meta.get("ImageHeight"))

    @property
    def mime_type(self):
        return str(self.meta.get("MIMEType", "image/jpeg"))

    @property
    def mime_size(self):
        try:
            size = os.path.getsize(self.linked.fpath)
        except Exception as e:
            logger.error(
                "Failed to get mime size of %s", self.linked.fpath
            )
            size = self.meta.get("FileSize", 0)
        return size

    @property
    def displayed(self):
        ret = self.resized_images[0][1]
        for size, r in self.resized_images:
            if size == settings.photo.get("default"):
                ret = r
        return ret

    @property
    def linked(self):
        m = 0
        ret = self.resized_images[0][1]
        for size, r in self.resized_images:
            if size > m:
                m = size
                ret = r
        return ret

    @property
    def src(self):
        return self.displayed.url

    @property
    def href(self):
        return self.linked.url

    @property
    def is_photo(self):
        r = settings.photo.get("re_author", None)
        if not r:
            return False
        cpr = self.meta.get("Copyright", "")
        art = self.meta.get("Artist", "")
        # both Artist and Copyright missing from EXIF
        if not cpr and not art:
            return False
        # we have regex, Artist and Copyright, try matching them
        if r.search(cpr) or r.search(art):
            return True
        return False

    @property
    def exif(self):
        exif = {
            "Model": "",
            "FNumber": "",
            "ExposureTime": "",
            "FocalLength": "",
            "ISO": "",
            "LensID": "",
            "CreateDate": str(arrow.get(self.mtime)),
            "GPSLatitude": 0,
            "GPSLongitude": 0,
        }
        if not self.is_photo:
            return exif

        mapping = {
            "Model": ["Model"],
            "FNumber": ["FNumber", "Aperture"],
            "ExposureTime": ["ExposureTime"],
            "FocalLength": ["FocalLength"],
            "ISO": ["ISO"],
            "LensID": ["LensID", "LensSpec", "Lens"],
            "CreateDate": ["CreateDate", "DateTimeOriginal"],
            "GPSLatitude": ["GPSLatitude"],
            "GPSLongitude": ["GPSLongitude"],
        }

        for ekey, candidates in mapping.items():
            for candidate in candidates:
                maybe = self.meta.get(candidate, None)
                if not maybe:
                    continue
                else:
                    exif[ekey] = maybe
                break
        return settings.nameddict(exif)

    def _maybe_watermark(self, img):
        if not self.is_photo:
            return img

        wmarkfile = settings.paths.get("watermark")
        if not os.path.exists(wmarkfile):
            return img

        with wand.image.Image(filename=wmarkfile) as wmark:
            w = self.height * 0.2
            h = wmark.height * (w / wmark.width)
            if self.width > self.height:
                x = self.width - w - (self.width * 0.01)
                y = self.height - h - (self.height * 0.01)
            else:
                x = self.width - h - (self.width * 0.01)
                y = self.height - w - (self.height * 0.01)

            w = round(w)
            h = round(h)
            x = round(x)
            y = round(y)

            wmark.resize(w, h)
            if self.width <= self.height:
                wmark.rotate(-90)
            img.composite(image=wmark, left=x, top=y)
        return img

    async def downsize(self):
        need = False
        for size, resized in self.resized_images:
            if not resized.exists or settings.args.get("regenerate"):
                need = True
                break
        if not need:
            return

        with wand.image.Image(filename=self.fpath) as img:
            img.auto_orient()
            img = self._maybe_watermark(img)
            for size, resized in self.resized_images:
                if not resized.exists or settings.args.get(
                    "regenerate"
                ):
                    logger.info(
                        "resizing image: %s to size %d",
                        os.path.basename(self.fpath),
                        size,
                    )
                    await resized.make(img)

    class Resized:
        def __init__(self, parent, size, crop=False):
            self.parent = parent
            self.size = size
            self.crop = crop

        # @property
        # def data(self):
        # with open(self.fpath, "rb") as f:
        # encoded = base64.b64encode(f.read())
        # return "data:%s;base64,%s" % (
        # self.parent.mime_type,
        # encoded.decode("utf-8"),
        # )

        @property
        def suffix(self):
            return settings.photo.get("sizes").get(self.size, "")

        @property
        def fname(self):
            return "%s%s%s" % (
                self.parent.fname,
                self.suffix,
                self.parent.fext,
            )

        @property
        def fpath(self):
            return os.path.join(
                self.parent.parent.renderdir, self.fname
            )

        @property
        def url(self):
            return "%s/%s/%s" % (
                settings.site.get("url"),
                self.parent.parent.name,
                "%s%s%s"
                % (self.parent.fname, self.suffix, self.parent.fext),
            )

        @property
        def relpath(self):
            return "%s/%s" % (
                self.parent.parent.renderdir.replace(
                    settings.paths.get("build"), ""
                ),
                self.fname,
            )

        @property
        def exists(self):
            if os.path.isfile(self.fpath):
                if mtime(self.fpath) >= self.parent.mtime:
                    return True
            return False

        @property
        def width(self):
            return self.dimensions[0]

        @property
        def height(self):
            return self.dimensions[1]

        @property
        def dimensions(self):
            width = self.parent.width
            height = self.parent.height
            size = self.size

            ratio = max(width, height) / min(width, height)
            horizontal = True if (width / height) >= 1 else False

            # panorama: reverse "horizontal" because the limit should be on
            # the shorter side, not the longer, and make it a bit smaller, than
            # the actual limit
            # 2.39 is the wide angle cinematic view: anything wider, than that
            # is panorama land
            if ratio > 2.4 and not self.crop:
                size = int(size * 0.6)
                horizontal = not horizontal

            if (horizontal and not self.crop) or (
                not horizontal and self.crop
            ):
                w = size
                h = int(float(size / width) * height)
            else:
                h = size
                w = int(float(size / height) * width)
            return (w, h)

        async def make(self, original):
            if not os.path.isdir(os.path.dirname(self.fpath)):
                os.makedirs(os.path.dirname(self.fpath))

            with original.clone() as thumb:
                thumb.resize(self.width, self.height)

                if self.crop:
                    thumb.liquid_rescale(self.size, self.size, 1, 1)

                if (
                    self.parent.meta.get("FileType", "jpeg").lower()
                    == "jpeg"
                ):
                    thumb.compression_quality = 88
                    thumb.unsharp_mask(
                        radius=1, sigma=0.5, amount=0.7, threshold=0.5
                    )
                    thumb.format = "pjpeg"

                # this is to make sure pjpeg happens
                with open(self.fpath, "wb") as f:
                    logger.info("writing %s", self.fpath)
                    thumb.save(file=f)


class Singular(MarkdownDoc):
    """
    A Singular object: a complete representation of a post, including
    all it's comments, files, images, etc
    """

    def __init__(self, fpath):
        self.fpath = fpath
        self.dirpath = os.path.dirname(fpath)
        self.name = os.path.basename(self.dirpath)
        self.category = os.path.basename(os.path.dirname(self.dirpath))

    @cached_property
    def files(self):
        """
        An array of files present at the same directory level as
        the Singular object, excluding hidden (starting with .) and markdown
        (ending with .md) files
        """
        return [
            k
            for k in glob.glob(os.path.join(self.dirpath, "*.*"))
            if not k.startswith(".")
        ]

    @cached_property
    def comments(self):
        """
        An dict of Comment objects keyed with their path, populated from the
        same directory level as the Singular objects
        """
        comments = {}
        canditates = glob.glob(os.path.join(self.dirpath, "*.md"))
        for candidate in canditates:
            if os.path.basename(candidate) == settings.filenames.md:
                continue
            if candidate.startswith("."):
                continue
            comment = Comment(candidate)
            comments[comment.dt.timestamp] = comment
        return comments

    @cached_property
    def images(self):
        """
        A dict of WebImage objects, populated by:
        - images that are present in the Markdown content
        - and have an actual image file at the same directory level as
        the Singular object
        """
        images = {}
        for match, alt, fname, title, css in RE_MDIMG.findall(
            self.content
        ):
            mdimg = MarkdownImage(match, alt, fname, title, css)
            imgpath = os.path.join(self.dirpath, fname)
            if imgpath in self.files:
                kind = filetype.guess(imgpath)
                if kind and "image" in kind.mime.lower():
                    images.update(
                        {match: WebImage(imgpath, mdimg, self)}
                    )
            else:
                logger.error(
                    "Missing image: %s, referenced in %s",
                    imgpath,
                    self.fpath,
                )
                continue
        return images

    @property
    def summary(self):
        return str(self.meta.get("summary", ""))

    @cached_property
    def html_summary(self):
        if not len(self.summary):
            return ""
        else:
            return PandocMD2HTML(self.summary)

    @cached_property
    def txt_summary(self):
        if not len(self.summary):
            return ""
        else:
            return PandocMD2TXT(self.summary)

    @property
    def published(self):
        # ok, so here's a hack: because I have no idea when my older photos
        # were actually published, any photo from before 2014 will have
        # the EXIF createdate as publish date
        pub = arrow.get(self.meta.get("published"))
        if self.is_photo:
            maybe = arrow.get(self.photo.exif.get("CreateDate"))
            if maybe.year < settings.photo.earlyyears:
                pub = maybe
        return pub

    @property
    def updated(self):
        if "updated" in self.meta:
            return arrow.get(self.meta.get("updated"))
        else:
            return self.dt

    @property
    def sameas(self):
        r = {}
        for k in glob.glob(os.path.join(self.dirpath, "*.copy")):
            with open(k, "rt") as f:
                r.update({f.read(): True})
        return list(r.keys())

    @property
    def is_page(self):
        """ all the categories starting with _ are pages """
        if self.category.startswith("_"):
            return True
        return False

    @property
    def is_front(self):
        if self.category in settings.notinfeed:
            return False
        return True

    @property
    def is_photo(self):
        """
        This is true if there is a file, with the same name as the entry's
        directory - so, it's slug -, and that that image believes it's a a
        photo.
        """
        if len(self.images) != 1:
            return False
        photo = next(iter(self.images.values()))
        maybe = self.fpath.replace(
            settings.filenames.md, "%s.jpg" % (self.name)
        )
        if photo.fpath == maybe:
            return True
        return False

    @property
    def is_reply(self):
        return self.meta.get("in-reply-to", False)

    @property
    def is_future(self):
        if self.published.timestamp > arrow.utcnow().timestamp:
            return True
        return False

    @property
    def photo(self):
        if not self.is_photo:
            return None
        return next(iter(self.images.values()))

    @property
    def title(self):
        if self.is_reply:
            return "RE: %s" % self.is_reply
        return self.meta.get(
            "title", self.published.format(settings.displaydate)
        )

    @property
    def tags(self):
        return self.meta.get("tags", [])

    def baseN(
        self, num, b=36, numerals="0123456789abcdefghijklmnopqrstuvwxyz"
    ):
        """
        Creates short, lowercase slug for a number (an epoch) passed
        """
        num = int(num)
        return ((num == 0) and numerals[0]) or (
            self.baseN(num // b, b, numerals).lstrip(numerals[0])
            + numerals[num % b]
        )

    @property
    def shortslug(self):
        return self.baseN(self.published.timestamp)

    @property
    def to_syndicate(self):
        urls = self.meta.get("syndicate", [])
        if not self.is_page:
            urls.append("https://fed.brid.gy/")
            urls.append("https://brid.gy/publish/mastodon")
        if self.is_photo:
            urls.append("https://brid.gy/publish/flickr")
        return urls

    @property
    def to_ping(self):
        webmentions = []
        for url in self.to_syndicate:
            w = Webmention(
                self.url,
                url,
                os.path.dirname(self.fpath),
                self.dt.timestamp,
            )
            webmentions.append(w)
        if self.is_reply:
            w = Webmention(
                self.url,
                self.is_reply,
                os.path.dirname(self.fpath),
                self.dt.timestamp,
            )
            webmentions.append(w)
        return webmentions

    @property
    def licence(self):
        k = "_default"
        if self.category in settings.licence:
            k = self.category
        return settings.licence[k]

    @property
    def lang(self):
        lang = "en"
        try:
            lang = langdetect.detect(
                "\n".join([self.meta.get("title", ""), self.content])
            )
        except BaseException:
            pass
        return lang

    @property
    def url(self):
        return "%s/%s/" % (settings.site.get("url"), self.name)

    @property
    def has_code(self):
        if RE_CODE.search(self.content):
            return True
        else:
            return False

    @cached_property
    def review(self):
        if "review" not in self.meta:
            return False
        review = self.meta.get("review")
        rated, outof = review.get("rating").split("/")
        r = {
            "@context": "https://schema.org/",
            "@type": "Review",
            "reviewRating": {
                "@type": "Rating",
                "@context": "http://schema.org",
                "ratingValue": rated,
                "bestRating": outof,
                "worstRating": 1,
            },
            "name": review.get("title"),
            "text": review.get("summary"),
            "url": review.get("url"),
            "author": settings.author,
        }
        return r

    @cached_property
    def event(self):
        if "event" not in self.meta:
            return False
        event = self.meta.get("event", {})
        r = {
            "@context": "http://schema.org",
            "@type": "Event",
            "endDate": str(arrow.get(event.get("end"))),
            "startDate": str(arrow.get(event.get("start"))),
            "location": {
                "@context": "http://schema.org",
                "@type": "Place",
                "address": event.get("location"),
                "name": event.get("location"),
            },
            "name": self.title,
        }
        return r

    @cached_property
    def jsonld(self):
        r = {
            "@context": "http://schema.org",
            "@type": "Article",
            "@id": self.url,
            "inLanguage": self.lang,
            "headline": self.title,
            "url": self.url,
            "genre": self.category,
            "mainEntityOfPage": f"{self.url}#article",
            "dateModified": str(self.dt),
            "datePublished": str(self.published),
            "copyrightYear": str(self.published.format("YYYY")),
            "license": f"https://spdx.org/licenses/{self.licence}.html",
            "image": settings.site.image,
            "author": settings.author,
            "sameAs": self.sameas,
            "publisher": settings.site.publisher,
            "name": self.name,
            "text": self.html_content,
            "description": self.html_summary,
            "potentialAction": [],
            "comment": [],
            "commentCount": len(self.comments.keys()),
            "keywords": self.tags,
        }

        if self.is_photo:
            r.update({"@type": "Photograph"})
        elif self.has_code:
            r.update({"@type": "TechArticle"})
        elif self.is_page:
            r.update({"@type": "WebPage"})
        if len(self.images):
            r["image"] = []
            for img in list(self.images.values()):
                imgld = img.jsonld
                imgld["text"] = str(img)
                r["image"].append(imgld)

        if self.is_reply:
            r.update(
                {
                    "mentions": {
                        "@context": "http://schema.org",
                        "@type": "Thing",
                        "url": self.is_reply,
                    }
                }
            )

        if self.review:
            r.update({"review": self.review})

        if self.event:
            r.update({"subjectOf": self.event})

        for url in list(set(self.to_syndicate)):
            r["potentialAction"].append(
                {
                    "@context": "http://schema.org",
                    "@type": "InteractAction",
                    "target": url,
                }
            )

        for mtime in sorted(self.comments.keys()):
            r["comment"].append(self.comments[mtime].jsonld)

        return settings.nameddict(r)

    @property
    def template(self):
        return f"{self.__class__.__name__}.j2.html"

    @property
    def txttemplate(self):
        return f"{self.__class__.__name__}.j2.txt"

    @property
    def renderdir(self):
        return os.path.join(settings.paths.get("build"), self.name)

    @property
    def renderfile(self):
        return os.path.join(self.renderdir, settings.filenames.html)

    @property
    def txtfile(self):
        return os.path.join(self.renderdir, settings.filenames.txt)

    @property
    def exists(self):
        if settings.args.get("force"):
            logger.debug("rendering required: force mode on")
            return False
        maybe = self.dt.timestamp
        if len(self.files):
            for f in self.files:
                maybe = max(maybe, mtime(f))
        for f in [self.renderfile, self.txtfile]:
            if not os.path.exists(f):
                logger.debug(f"rendering required: no {f} yet")
                return False
            elif maybe > mtime(f):
                logger.debug(f"rendering required: self.dt > {f} mtime")
                return False
        logger.debug("rendering not required")
        return True

    @property
    def corpus(self):
        return "\n".join(
            [self.title, self.name, self.summary, self.content]
        )

    async def copy_files(self):
        exclude = [
            ".md",
            ".jpg",
            ".png",
            ".gif",
            ".ping",
            ".url",
            ".del",
            ".copy",
            ".cache",
        ]
        files = glob.glob(
            os.path.join(os.path.dirname(self.fpath), "*.*")
        )
        for f in files:
            fname, fext = os.path.splitext(f)
            if fext.lower() in exclude:
                continue

            t = os.path.join(
                settings.paths.get("build"),
                self.name,
                os.path.basename(f),
            )
            if os.path.exists(t) and mtime(f) <= mtime(t):
                continue
            logger.info("copying '%s' to '%s'", f, t)
            cp(f, t)

    @property
    def has_archive(self):
        return len(
            glob.glob(os.path.join(self.dirpath, f"*archiveorg*.copy"))
        )

    async def get_from_archiveorg(self):
        if self.has_archive:
            return
        if self.is_future:
            return
        if (
            self.published.timestamp + 86400
        ) > arrow.utcnow().timestamp:
            return
        logger.info("archive.org .copy is missing for %s", self.name)
        if len(self.category) and not (
            settings.args.get("noservices")
            or settings.args.get("offline")
        ):
            wb = wayback.FindWaybackURL(self.name, self.category)
            wb.run()
            if len(wb.oldest):
                archiveurl = url2slug(wb.oldest)
                t = os.path.join(self.dirpath, f"{archiveurl}.copy")
                writepath(t, wb.oldest)
            del wb

    async def render(self):
        await self.get_from_archiveorg()

        if self.exists:
            return True

        logger.info("rendering %s", self.name)
        v = {
            "baseurl": self.url,
            "post": self.jsonld,
            "site": settings.site,
            "menu": settings.menu,
            "meta": settings.meta,
            "fnames": settings.filenames,
        }
        writepath(
            self.renderfile, J2.get_template(self.template).render(v)
        )
        del v

        g = {
            "post": self.jsonld,
            "summary": self.txt_summary,
            "content": self.txt_content,
        }
        writepath(
            self.txtfile, J2.get_template(self.txttemplate).render(g)
        )
        del g


class Home(Singular):
    def __init__(self, fpath):
        super().__init__(fpath)
        self.cdata = {}
        self.pdata = {}

    def add(self, category, post):
        if not len(category.name):
            return

        if category.name not in self.cdata:
            self.cdata[category.name] = category

        if category.name not in self.pdata:
            self.pdata[category.name] = post
        else:
            current = arrow.get(self.pdata[category.name].datePublished)
            if current > post.published:
                return
            else:
                self.pdata[category.name] = post
                return

    @property
    def posts(self):
        flattened = []
        order = {}
        for cname, post in self.pdata.items():
            order[post.published.timestamp] = cname

        for mtime in sorted(order.keys(), reverse=True):
            category = self.cdata[order[mtime]].ctmplvars
            post = self.pdata[order[mtime]].jsonld
            flattened.append((category, post))

        return flattened

    @property
    def renderdir(self):
        return settings.paths.get("build")

    @property
    def renderfile(self):
        return os.path.join(
            settings.paths.get("build"), settings.filenames.html
        )

    @property
    def dt(self):
        ts = 0
        for cat, post in self.posts:
            ts = max(ts, arrow.get(post["dateModified"]).timestamp)
        return arrow.get(ts)

    async def render_gopher(self):
        lines = ["%s's gopherhole" % (settings.site.name), "", ""]

        for category, post in self.posts:
            line = "1%s\t/%s/%s\t%s\t70" % (
                category["name"],
                settings.paths.category,
                category["name"],
                settings.site.name,
            )
            lines.append(line)
        lines.append("")
        writepath(
            self.renderfile.replace(
                settings.filenames.html, settings.filenames.gopher
            ),
            "\r\n".join(lines),
        )

    async def render(self):
        if self.exists:
            return
        logger.info("rendering %s", self.name)
        r = J2.get_template(self.template).render(
            {
                "baseurl": settings.site.get("url"),
                "post": self.jsonld,
                "site": settings.site,
                "menu": settings.menu,
                "meta": settings.meta,
                "posts": self.posts,
                "fnames": settings.filenames,
            }
        )
        writepath(self.renderfile, r)
        await self.render_gopher()


class PHPFile(object):
    @property
    def exists(self):
        if settings.args.get("force"):
            return False
        if not os.path.exists(self.renderfile):
            return False
        if self.mtime > mtime(self.renderfile):
            return False
        return True

    @property
    def mtime(self):
        return mtime(
            os.path.join(settings.paths.get("tmpl"), self.templatefile)
        )

    @property
    def renderfile(self):
        raise ValueError("Not implemented")

    @property
    def templatefile(self):
        raise ValueError("Not implemented")

    async def render(self):
        # if self.exists:
        # return
        await self._render()


class Search(PHPFile):
    def __init__(self):
        self.fpath = os.path.join(
            settings.paths.get("build"), "search.sqlite"
        )
        self.db = sqlite3.connect(self.fpath)
        self.db.execute("PRAGMA auto_vacuum = INCREMENTAL;")
        self.db.execute("PRAGMA journal_mode = MEMORY;")
        self.db.execute("PRAGMA temp_store = MEMORY;")
        self.db.execute("PRAGMA locking_mode = NORMAL;")
        self.db.execute("PRAGMA synchronous = FULL;")
        self.db.execute('PRAGMA encoding = "UTF-8";')
        self.db.execute(
            """
            CREATE VIRTUAL TABLE IF NOT EXISTS data USING fts4(
                url,
                mtime,
                name,
                title,
                category,
                content,
                notindexed=category,
                notindexed=url,
                notindexed=mtime,
                tokenize=porter
            )"""
        )
        self.is_changed = False

    def __exit__(self):
        if self.is_changed:
            self.db.commit()
            self.db.execute("PRAGMA auto_vacuum;")
        self.db.close()

    def check(self, name):
        ret = 0
        maybe = self.db.execute(
            """
            SELECT
                mtime
            FROM
                data
            WHERE
                name = ?
        """,
            (name,),
        ).fetchone()
        if maybe:
            ret = int(maybe[0])
        return ret

    def append(self, post):
        mtime = int(post.published.timestamp)
        check = self.check(post.name)
        if check and check < mtime:
            self.db.execute(
                """
            DELETE
            FROM
                data
            WHERE
                name=?""",
                (post.name,),
            )
            check = False
        if not check:
            self.db.execute(
                """
                INSERT INTO
                    data
                    (url, mtime, name, title, category, content)
                VALUES
                    (?,?,?,?,?,?);
            """,
                (
                    post.url,
                    mtime,
                    post.name,
                    post.title,
                    post.category,
                    post.content,
                ),
            )
            self.is_changed = True

    @property
    def templates(self):
        return ["Search.j2.php", "OpenSearch.j2.xml"]

    async def _render(self):
        for template in self.templates:
            r = J2.get_template(template).render(
                {
                    "post": {},
                    "site": settings.site,
                    "menu": settings.menu,
                    "meta": settings.meta,
                }
            )
            target = os.path.join(
                settings.paths.get("build"),
                template.replace(".j2", "").lower(),
            )
            writepath(target, r)


class IndexPHP(PHPFile):
    def __init__(self):
        self.gone = {}
        self.redirect = {}

    def add_gone(self, uri):
        self.gone[uri] = True

    def add_redirect(self, source, target):
        if target in self.gone:
            self.add_gone(source)
        else:
            if "://" not in target:
                target = "%s/%s" % (settings.site.get("url"), target)
            self.redirect[source] = target

    @property
    def renderfile(self):
        return os.path.join(settings.paths.get("build"), "index.php")

    @property
    def templatefile(self):
        return "404.j2.php"

    async def _render(self):
        r = J2.get_template(self.templatefile).render(
            {
                "post": {},
                "site": settings.site,
                "menu": settings.menu,
                "gones": self.gone,
                "redirects": self.redirect,
                "rewrites": settings.rewrites,
                "gone_re": settings.gones,
            }
        )
        writepath(self.renderfile, r)


class Micropub(PHPFile):
    @property
    def renderfile(self):
        return os.path.join(settings.paths.get("build"), "micropub.php")

    @property
    def templatefile(self):
        return "%s.j2.php" % (self.__class__.__name__)

    async def _render(self):
        r = J2.get_template(self.templatefile).render(
            {
                "wallabag": keys.wallabag,
                "site": settings.site,
            }
        )
        writepath(self.renderfile, r)

class WorldMap(object):
    def __init__(self):
        self.data = {}
        self.mtime = 0

    def add(self, post):
        if not post.is_photo:
            return
        if not post.photo.jsonld.locationCreated:
            return

        lat = post.photo.jsonld.locationCreated.geo.latitude
        lon = post.photo.jsonld.locationCreated.geo.longitude
        k = (lat, lon)
        content = f'<p><a href="{post.url}"><img src="{post.photo.src}" style="width: 150px; height: auto" /><br />{post.title}</a></p>'
        # d = {"latitude": nlat, "longitude": nlon, "popup": content}
        if k in self.data:
            self.data[k].append(content)
        else:
            self.data[k] = [content]
        self.mtime = max(post.dt.timestamp, self.mtime)

    @property
    def exists(self):
        if settings.args.get("force"):
            return False
        if not os.path.exists(self.renderfile):
            return False
        if mtime(self.renderfile) >= self.mtime:
            return True
        return False

    @property
    def renderfile(self):
        return os.path.join(
            settings.paths.get("build"), settings.filenames.worldmap
        )

    @property
    def template(self):
        return "%s.j2.html" % (self.__class__.__name__)

    @property
    def tmplvars(self):
        return {
            "token": keys.mapbox,
            "site": settings.site,
            "menu": settings.menu,
            "meta": settings.meta,
            "site": settings.site,
            "geo": self.data,
        }

    async def render(self):
        if self.exists:
            return
        logger.info(
            "rendering %s to %s", self.__class__, self.renderfile
        )
        writepath(
            self.renderfile,
            J2.get_template(self.template).render(self.tmplvars),
        )


class Category(dict):
    def __init__(self, name=""):
        self.name = name

    def __setitem__(self, key, value):
        if key in self:
            raise LookupError(
                f"key '{key}' already exists, colliding posts are: {self[key].fpath} vs {value.fpath}"
            )
        dict.__setitem__(self, key, value)

    @property
    def title(self):
        if len(self.name):
            return f"{self.name} - {settings.site.name}"
        else:
            return settings.site.headline

    @property
    def url(self):
        if len(self.name):
            url = f"{settings.site.url}/{settings.paths.category}/{self.name}/"
        else:
            url = f"{settings.site.url}/"
        return url

    @property
    def feedurl(self):
        return f"{self.url}{settings.paths.feed}/"

    @property
    def sortedkeys(self):
        return list(sorted(self.keys(), reverse=True))

    @property
    def ctmplvars(self):
        return {
            "name": self.name,
            "url": self.url,
            "feed": self.feedurl,
            "title": self.title,
        }

    @property
    def renderdir(self):
        b = settings.paths.build
        if len(self.name):
            b = os.path.join(b, settings.paths.category, self.name)
        return b

    @property
    def newest_year(self):
        return arrow.get(max(self.keys())).format("YYYY")

    @cached_property
    def years(self):
        years = {}
        for key in list(sorted(self.keys(), reverse=True)):
            year = arrow.get(int(key)).format("YYYY")
            if year in years:
                continue
            if year == self.newest_year:
                url = f"{self.url}{settings.filenames.html}"
            else:
                url = f"{self.url}{year}/{settings.filenames.html}"
            years.update({year: url})
        return years

    async def render_feeds(self):
        await self.AtomFeed(self).render()
        await self.RSSFeed(self).render()
        await self.JSONFeed(self).render()

    async def render(self):
        await self.render_feeds()
        await self.Gopher(self).render()
        if self.name in settings.flat:
            await self.Flat(self).render()
        else:
            for year in sorted(self.years.keys()):
                await self.Year(self, year).render()

    class JSONFeed(object):
        def __init__(self, parent):
            self.parent = parent

        @property
        def mtime(self):
            return max(
                list(sorted(self.parent.keys(), reverse=True))[
                    0 : settings.pagination
                ]
            )

        @property
        def renderfile(self):
            return os.path.join(
                self.parent.renderdir,
                settings.paths.feed,
                settings.filenames.json,
            )

        @property
        def exists(self):
            if settings.args.get("force"):
                return False
            if not os.path.exists(self.renderfile):
                return False
            if mtime(self.renderfile) >= self.mtime:
                return True
            return False

        async def render(self):
            if self.exists:
                logger.debug(
                    "category %s is up to date", self.parent.name
                )
                return

            logger.info(
                "rendering JSON feed for category %s", self.parent.name
            )

            js = {
                "version": "https://jsonfeed.org/version/1",
                "title": self.parent.title,
                "home_page_url": settings.site.url,
                "feed_url": f"{self.parent.url}{settings.filenames.json}",
                "author": {
                    "name": settings.author.name,
                    "url": settings.author.url,
                    "avatar": settings.author.image,
                },
                "items": [],
            }

            for key in list(sorted(self.parent.keys(), reverse=True))[
                0 : settings.pagination
            ]:
                post = self.parent[key]
                pjs = {
                    "id": post.url,
                    "content_text": post.txt_content,
                    "content_html": post.html_content,
                    "url": post.url,
                    "date_published": str(post.published),
                }
                if len(post.summary):
                    pjs.update({"summary": post.txt_summary})
                if post.is_photo:
                    pjs.update(
                        {
                            "attachment": {
                                "url": post.photo.href,
                                "mime_type": post.photo.mime_type,
                                "size_in_bytes": f"{post.photo.mime_size}",
                            }
                        }
                    )
                js["items"].append(pjs)
            writepath(
                self.renderfile,
                json.dumps(js, indent=4, ensure_ascii=False),
            )

    class XMLFeed(object):
        def __init__(self, parent):
            self.parent = parent

        def init_entry(self, post):
            fe = FeedEntry()
            fe.id(post.url)
            fe.title(post.title)
            fe.published(post.published.datetime)
            fe.updated(arrow.get(post.dt).datetime)
            lname = post.licence.upper()
            lyear = post.published.format("YYYY")
            fe.rights(f"{lname} {settings.author.name} {lyear}")
            fe.author(
                {
                    "name": settings.author.name,
                    "email": settings.author.email,
                }
            )
            categories = []
            for tag in set(post.tags):
                categories.append(
                    {
                        "term": tag
                        # "scheme": "https://schema.org/keywords"
                    }
                )
            fe.category(categories)
            if post.is_photo:
                fe.enclosure(
                    post.photo.href,
                    "%d" % post.photo.mime_size,
                    post.photo.mime_type,
                )
            return fe

        @property
        def rkeys(self):
            rkeys = list(sorted(self.parent.keys(), reverse=True))
            rkeys = rkeys[0 : settings.pagination]
            rkeys = list(sorted(rkeys, reverse=False))
            return rkeys

        @property
        def mtime(self):
            return max(
                list(sorted(self.parent.keys(), reverse=True))[
                    0 : settings.pagination
                ]
            )

        @property
        def renderfile(self):
            return os.path.join(
                self.parent.renderdir, settings.paths.feed, "index.xml"
            )

        @property
        def exists(self):
            if settings.args.get("force"):
                return False
            if not os.path.exists(self.renderfile):
                return False
            if mtime(self.renderfile) >= self.mtime:
                return True
            return False

        def uptodate(self):
            logger.debug(
                "category %s %s is up to date",
                self.parent.name,
                self.__class__.__name__,
            )

        def notuptodate(self):
            logger.info(
                "rendering %s feed for category %s",
                self.__class__.__name__,
                self.parent.name,
            )

        def init_fg(self):
            fg = FeedGenerator()
            fg.id(self.parent.feedurl)
            fg.title(self.parent.title)
            fg.logo(settings.site.image)
            fg.updated(arrow.get(self.mtime).to("utc").datetime)
            fg.description(settings.site.headline)
            fg.link(href=self.parent.feedurl)
            fg.author(
                {
                    "name": settings.author.name,
                    "email": settings.author.email,
                }
            )
            return fg

    class AtomFeed(XMLFeed):
        @property
        def renderfile(self):
            return os.path.join(
                self.parent.renderdir,
                settings.paths.feed,
                settings.filenames.atom,
            )

        async def render(self):
            if self.exists:
                self.uptodate()
                return

            self.notuptodate()
            fg = self.init_fg()

            for key in self.rkeys:
                post = self.parent[key]
                fe = self.init_entry(post)
                fe.link(
                    href=post.url, rel="alternate", type="text/html"
                )
                # fe.content(src=post.url, type="text/html")
                fe.content(post.html_content, type="html")
                if len(post.summary):
                    fe.summary(post.summary)
                fg.add_entry(fe)

            writepath(self.renderfile, fg.atom_str(pretty=True))

    class RSSFeed(XMLFeed):
        @property
        def renderfile(self):
            return os.path.join(
                self.parent.renderdir,
                settings.paths.feed,
                settings.filenames.rss,
            )

        async def render(self):
            if self.exists:
                self.uptodate()
                return

            self.notuptodate()
            fg = self.init_fg()

            for key in self.rkeys:
                post = self.parent[key]
                fe = self.init_entry(post)
                fe.link(href=post.url)
                fe.content(post.html_content, type="CDATA")
                fg.add_entry(fe)

            writepath(self.renderfile, fg.rss_str(pretty=True))

    class Year(object):
        def __init__(self, parent, year):
            self.parent = parent
            self.year = str(year)

        @cached_property
        def keys(self):
            year = arrow.get(self.year, "YYYY").to("utc")
            keys = []
            for key in list(sorted(self.parent.keys(), reverse=True)):
                ts = arrow.get(int(key))
                if ts <= year.ceil("year") and ts >= year.floor("year"):
                    keys.append(int(key))
            return keys

        @property
        def posttmplvars(self):
            return [self.parent[key].jsonld for key in self.keys]

        @property
        def mtime(self):
            return max(self.keys)

        @property
        def renderfile(self):
            if self.year == self.parent.newest_year:
                return os.path.join(
                    self.parent.renderdir, settings.filenames.html
                )
            else:
                return os.path.join(
                    self.parent.renderdir,
                    self.year,
                    settings.filenames.html,
                )

        @property
        def baseurl(self):
            if self.year == self.parent.newest_year:
                return self.parent.url
            else:
                return f"{self.parent.url}{self.year}/"

        @property
        def template(self):
            return "%s.j2.html" % (self.__class__.__name__)

        @property
        def exists(self):
            if settings.args.get("force"):
                return False
            if not os.path.exists(self.renderfile):
                return False
            if mtime(self.renderfile) >= self.mtime:
                return True
            return False

        @property
        def tmplvars(self):
            return {
                "baseurl": self.baseurl,
                "site": settings.site,
                "menu": settings.menu,
                "meta": settings.meta,
                "fnames": settings.filenames,
                "category": {
                    "name": self.parent.name,
                    "url": self.parent.url,
                    "feed": self.parent.feedurl,
                    "title": self.parent.title,
                    "paginated": True,
                    "years": self.parent.years,
                    "year": self.year,
                },
                "posts": self.posttmplvars,
            }

        async def render(self):
            if self.exists:
                logger.debug(
                    "category %s is up to date", self.parent.name
                )
                return
            logger.info(
                "rendering year %s for category %s",
                self.year,
                self.parent.name,
            )
            r = J2.get_template(self.template).render(self.tmplvars)
            writepath(self.renderfile, r)
            del r

    class Flat(object):
        def __init__(self, parent):
            self.parent = parent

        @property
        def posttmplvars(self):
            return [
                self.parent[key].jsonld
                for key in list(
                    sorted(self.parent.keys(), reverse=True)
                )
            ]

        @property
        def mtime(self):
            return max(self.parent.keys())

        @property
        def renderfile(self):
            return os.path.join(
                self.parent.renderdir, settings.filenames.html
            )

        @property
        def template(self):
            return "%s.j2.html" % (self.__class__.__name__)

        @property
        def exists(self):
            if settings.args.get("force"):
                return False
            if not os.path.exists(self.renderfile):
                return False
            if mtime(self.renderfile) >= self.mtime:
                return True
            return False

        @property
        def tmplvars(self):
            return {
                "baseurl": self.parent.url,
                "site": settings.site,
                "menu": settings.menu,
                "meta": settings.meta,
                "fnames": settings.filenames,
                "category": {
                    "name": self.parent.name,
                    "url": self.parent.url,
                    "feed": self.parent.feedurl,
                    "title": self.parent.title,
                },
                "posts": self.posttmplvars,
            }

        async def render(self):
            if self.exists:
                logger.debug(
                    "category %s is up to date", self.parent.name
                )
                return
            logger.info("rendering category %s", self.parent.name)
            r = J2.get_template(self.template).render(self.tmplvars)
            writepath(self.renderfile, r)
            del r

    class Gopher(object):
        def __init__(self, parent):
            self.parent = parent

        @property
        def mtime(self):
            return max(self.parent.keys())

        @property
        def exists(self):
            if settings.args.get("force"):
                return False
            if not os.path.exists(self.renderfile):
                return False
            if mtime(self.renderfile) >= self.mtime:
                return True
            return False

        @property
        def renderfile(self):
            return os.path.join(
                self.parent.renderdir, settings.filenames.gopher
            )

        async def render(self):
            if self.exists:
                logger.debug(
                    "category %s is up to date", self.parent.name
                )
                return

            lines = [
                "%s - %s" % (self.parent.name, settings.site.name),
                "",
                "",
            ]
            for post in [
                self.parent[key]
                for key in list(
                    sorted(self.parent.keys(), reverse=True)
                )
            ]:
                line = "0%s\t/%s/%s\t%s\t70" % (
                    post.title,
                    post.name,
                    settings.filenames.txt,
                    settings.site.name,
                )
                lines.append(line)
                if len(post.txt_summary):
                    lines.extend(post.txt_summary.split("\n"))
                for img in post.images.values():
                    line = "I%s\t/%s/%s\t%s\t70" % (
                        img.title,
                        post.name,
                        img.name,
                        settings.site.name,
                    )
                    lines.append(line)
                lines.append("")
            writepath(self.renderfile, "\r\n".join(lines))


class Sitemap(dict):
    @property
    def mtime(self):
        r = 0
        if os.path.exists(self.renderfile):
            r = mtime(self.renderfile)
        return r

    def append(self, post):
        self[post.url] = post.mtime

    @property
    def renderfile(self):
        return os.path.join(
            settings.paths.get("build"), settings.filenames.sitemap
        )

    async def render(self):
        if len(self) > 0:
            if self.mtime >= sorted(self.values())[-1]:
                return
            with open(self.renderfile, "wt") as f:
                f.write("\n".join(sorted(self.keys())))


class Webmention(object):
    """ outgoing webmention class """

    def __init__(self, source, target, dpath, mtime=0):
        self.source = source
        self.target = target
        self.dpath = dpath
        if not mtime:
            mtime = arrow.utcnow().timestamp
        self.mtime = mtime

    @property
    def fpath(self):
        return os.path.join(
            self.dpath, "%s.ping" % (url2slug(self.target))
        )

    @property
    def exists(self):
        if not os.path.isfile(self.fpath):
            return False
        elif mtime(self.fpath) > self.mtime:
            return True
        else:
            return False

    def save(self, content):
        writepath(self.fpath, content)

    async def send(self):
        if self.exists:
            return
        elif settings.args.get("noping"):
            self.save("noping entry at %s" % arrow.now())
            return

        telegraph_url = "https://telegraph.p3k.io/webmention"
        telegraph_params = {
            "token": "%s" % (keys.telegraph.get("token")),
            "source": "%s" % (self.source),
            "target": "%s" % (self.target),
        }
        r = requests.post(telegraph_url, data=telegraph_params)
        logger.info(
            "sent webmention to telegraph from %s to %s",
            self.source,
            self.target,
        )
        if r.status_code not in [200, 201, 202]:
            logger.error("sending failed: %s %s", r.status_code, r.text)
        else:
            self.save(r.text)

    async def backfill_syndication(self):
        """ this is very specific to webmention.io and brid.gy publish """

        if not self.exists:
            return
        if "fed.brid.gy" in self.target:
            return
        if "brid.gy" not in self.target:
            return
        if not self.exists:
            return

        with open(self.fpath, "rt") as f:
            txt = f.read()

        try:
            data = json.loads(txt)
        except Exception as e:
            """ if it's not a JSON, it's a manually placed file, ignore it """
            logger.debug("not a JSON webmention at %s", self.fpath)
            return

        # unprocessed webmention
        if "http_body" not in data and "location" in data:
            logger.debug(
                "fetching webmention.io respose from %s",
                data["location"],
            )
            wio = requests.get(data["location"])
            if wio.status_code != requests.codes.ok:
                logger.debug("fetching %s failed", data["location"])
                return

            try:
                wio_json = json.loads(wio.text)
                logger.debug("got response %s", wio_json)
                if "http_body" in wio_json and isinstance(
                    wio_json["http_body"], str
                ):
                    wio_json.update(
                        {
                            "http_body": json.loads(
                                "".join(wio_json["http_body"])
                            )
                        }
                    )
                    if "original" in wio_json["http_body"].keys():
                        wio_json.update(
                            {
                                "http_body": wio_json["http_body"][
                                    "original"
                                ]
                            }
                        )
                data = {**data, **wio_json}
            except Exception as e:
                logger.error(
                    "failed JSON from webmention.io %s because: %s",
                    wio.text,
                    e,
                )
                return

            logger.debug(
                "saving updated webmention.io data %s to %s",
                data,
                self.fpath,
            )
            with open(self.fpath, "wt") as update:
                update.write(json.dumps(data, sort_keys=True, indent=4))

        if "http_body" in data.keys():
            # healthy and processed webmention
            if (
                isinstance(data["http_body"], dict)
                and "url" in data["http_body"].keys()
            ):
                url = data["http_body"]["url"]
                sp = os.path.join(self.dpath, "%s.copy" % url2slug(url))
                if os.path.exists(sp):
                    logger.debug(
                        "syndication already exists for %s", url
                    )
                    return
                with open(sp, "wt") as f:
                    logger.info(
                        "writing syndication copy %s to %s", url, sp
                    )
                    f.write(url)
                    return


class WebmentionIO(object):
    def __init__(self):
        self.params = {
            "token": "%s" % (keys.webmentionio.get("token")),
            "since": "%s" % str(self.since),
            "domain": "%s" % (keys.webmentionio.get("domain")),
        }
        self.url = "https://webmention.io/api/mentions"

    @property
    def since(self):
        newest = 0
        content = settings.paths.get("content")
        for e in glob.glob(os.path.join(content, "*", "*", "*.md")):
            if os.path.basename(e) == settings.filenames.md:
                continue
            # filenames are like [received epoch]-[slugified source url].md
            try:
                mtime = int(os.path.basename(e).split("-")[0])
            except Exception as exc:
                logger.error(
                    "int conversation failed: %s, file was: %s", exc, e
                )
                continue
            if mtime > newest:
                newest = mtime
        return arrow.get(newest + 1)

    def makecomment(self, webmention):
        if "published_ts" in webmention.get("data"):
            maybe = webmention.get("data").get("published")
            if not maybe or maybe == "None":
                dt = arrow.get(webmention.get("verified_date"))
            else:
                dt = arrow.get(webmention.get("data").get("published"))

        slug = os.path.split(
            urlparse(webmention.get("target")).path.lstrip("/")
        )[0]

        author = webmention.get("data", {}).get("author", None)
        if not author:
            logger.error(
                "missing author info on webmention; skipping; webmention data is: %s",
                webmention.get("source"),
            )
            return

        # ignore selfpings
        if slug == settings.site.get("name"):
            return
        elif not len(slug):
            logger.error(
                "couldn't find post for incoming webmention: %s",
                webmention.get("source"),
            )

        fdir = glob.glob(
            os.path.join(settings.paths.get("content"), "*", slug)
        )

        if not len(fdir):
            logger.error(
                "couldn't find post for incoming webmention: %s",
                webmention.get("source"),
            )
            return
        elif len(fdir) > 1:
            logger.error(
                "multiple posts found for incoming webmention: %s",
                webmention.get("source"),
            )
            return

        fdir = fdir.pop()
        fpath = os.path.join(
            fdir,
            "%d-%s.md"
            % (dt.timestamp, url2slug(webmention.get("source"))),
        )

        author = webmention.get("data", {}).get("author", None)
        if not author:
            logger.error(
                "missing author info on webmention: %s", webmention
            )
            return
        meta = {
            "author": {
                "name": author.get("name", ""),
                "url": author.get("url", ""),
                "photo": author.get("photo", ""),
            },
            "date": str(dt),
            "source": webmention.get("source"),
            "target": webmention.get("target"),
            "type": webmention.get("activity").get(
                "type", "webmention"
            ),
        }

        try:
            txt = webmention.get("data").get("content", "").strip()
        except Exception as e:
            txt = ""
            pass

        r = "---\n%s\n---\n\n%s\n" % (utfyamldump(meta), txt)
        writepath(fpath, r, mtime=dt.timestamp)

    def run(self):
        webmentions = requests.get(self.url, params=self.params)
        logger.info("queried webmention.io with: %s", webmentions.url)
        if webmentions.status_code != requests.codes.ok:
            return
        try:
            mentions = webmentions.json()
            for webmention in mentions.get("links"):
                self.makecomment(webmention)
        except ValueError as e:
            logger.error("failed to query webmention.io: %s", e)
            pass


def make():
    start = int(round(time.time() * 1000))
    last = 0

    if not (
        settings.args.get("offline") or settings.args.get("noservices")
    ):
        incoming = WebmentionIO()
        incoming.run()

    queue = AQ()
    outbox = []
    to_archive = []

    content = settings.paths.get("content")
    rules = IndexPHP()

    sitemap = Sitemap()
    search = Search()
    categories = {}
    frontposts = Category()
    home = Home(settings.paths.get("home"))
    worldmap = WorldMap()
    postcount = 0
    commentcount = 0

    for e in glob.glob(os.path.join(content, "*", "*.url")):
        post = Redirect(e)
        rules.add_redirect(post.source, post.target)

    for e in sorted(
        glob.glob(
            os.path.join(content, "*", "*", settings.filenames.md)
        )
    ):
        post = Singular(e)
        if not post.is_future:
            postcount = postcount + 1
            commentcount = commentcount + len(post.comments)
            worldmap.add(post)
            for i in post.to_ping:
                outbox.append(i)
                if not (
                    settings.args.get("offline")
                    or settings.args.get("noservices")
                ):
                    queue.put(i.backfill_syndication())

        for i in post.images.values():
            queue.put(i.downsize())

        # if not post.is_future and not post.has_archive:
        # to_archive.append(post.url)

        # render and arbitrary file copy tasks for this very post
        queue.put(post.render())
        queue.put(post.copy_files())

        # skip draft posts from anything further
        if post.is_future:
            logger.info("%s is for the future", post.name)
            continue

        # add post to search database
        search.append(post)

        # start populating sitemap
        sitemap.append(post)

        # populate redirects, if any
        rules.add_redirect(post.shortslug, post.url)

        # any category starting with '_' are special: they shouldn't have a
        # category archive page
        if post.is_page:
            continue

        # populate the category with the post
        if post.category not in categories:
            categories[post.category] = Category(post.category)
        categories[post.category][post.published.timestamp] = post

        # add to front, if allowed
        if post.is_front:
            frontposts[post.published.timestamp] = post

    # commit to search database - this saves quite a few disk writes
    search.__exit__()

    # render search and sitemap
    queue.put(search.render())
    queue.put(sitemap.render())

    # make gone and redirect arrays for PHP
    for e in glob.glob(os.path.join(content, "*", "*.del")):
        post = Gone(e)
        queue.put(post.render())
        rules.add_gone(post.source)
    for e in glob.glob(os.path.join(content, "*", "*.url")):
        post = Redirect(e)
        rules.add_redirect(post.source, post.target)
        queue.put(post.render())
    # render 404 fallback PHP
    queue.put(rules.render())

    # render categories
    for category in categories.values():
        home.add(category, category.get(category.sortedkeys[0]))
        queue.put(category.render())

    queue.put(frontposts.render_feeds())
    queue.put(home.render())
    queue.put(worldmap.render())
    fediversemockery = FediverseStats(postcount, commentcount)
    queue.put(fediversemockery.render())
    micropub = Micropub()
    queue.put(micropub.render())
    queue.run()

    # copy static files
    for e in glob.glob(os.path.join(content, "*.*")):
        if e.endswith(".md"):
            continue
        t = os.path.join(
            settings.paths.get("build"), os.path.basename(e)
        )
        maybe_copy(e, t)

    end = int(round(time.time() * 1000))
    logger.info("process took %d ms" % (end - start))

    if not settings.args.get("offline"):
        # upload site
        try:
            logger.info("starting syncing")
            os.system(
                "rsync -avuhH --delete-after %s/ %s/"
                % (
                    settings.paths.get("build"),
                    "%s/%s"
                    % (
                        settings.syncserver,
                        settings.paths.get("remotewww"),
                    ),
                )
            )
            logger.info("syncing finished")
        except Exception as e:
            logger.error("syncing failed: %s", e)

        if not settings.args.get("noservices"):
            logger.info("sending webmentions")
            for wm in outbox:
                queue.put(wm.send())
            queue.run()
            logger.info("sending webmentions finished")


if __name__ == "__main__":
    make()