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"use strict";
const fs = require("fs");
const path = require("path");
const matter = require("gray-matter");
const markdown = require("../modules/markdown.js");
const { indentForTemplate, postIndentLevel } = require("../responders.js");
const grayMatterOptions = {
lang: "toml",
delims: "+++"
};
function* lowercaseKeys(iterator) {
for (let [k, v] of iterator) {
yield [String(k).toLowerCase(), v];
}
}
function canonicaliseMetadata(meta) {
if (meta.data) {
meta.data = new Map(lowercaseKeys(Object.entries(meta.data)));
} else {
meta.data = new Map();
}
return meta;
}
function getTitle(file) {
return path.basename(file.path, path.extname(file.path));
}
function get(getURL, filename) {
const fileMatter = matter.read(filename, grayMatterOptions);
fileMatter.basename = getTitle(fileMatter);
delete fileMatter.orig;
fileMatter.body = indentForTemplate(
markdown(fileMatter.content),
postIndentLevel
);
fileMatter.url = getURL(fileMatter.basename);
return canonicaliseMetadata(fileMatter);
}
function getFolder(folder, getURL) {
return new Map(
fs
.readdirSync(folder)
.map(f => path.resolve(folder, f))
.map(get.bind(this, getURL))
.map(f => [getTitle(f), f])
);
}
function taxonomise(taxonomies, posts) {
const taxons = new Map(Object.keys(taxonomies).map(t => [t, new Map()]));
for (let [, post] of posts) {
for (let [singularName, pluralName] of Object.entries(taxonomies)) {
if (post.data.has(pluralName)) {
for (let term of post.data.get(pluralName)) {
const current = taxons.get(singularName).get(term);
taxons
.get(singularName)
.set(term, current ? current.concat(post) : [post]);
}
}
}
}
return taxons;
}
module.exports = function(config, getURL) {
const posts = getFolder(config.folder, getURL);
const taxonomies = taxonomise(config.taxonomies, posts);
return {
posts,
taxonomies,
get
};
};
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