@diplodoc/transform
Version:
A simple transformer of text in YFM (Yandex Flavored Markdown) to HTML
134 lines • 5.1 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
const chalk_1 = require("chalk");
const js_yaml_1 = __importDefault(require("js-yaml"));
const CHANGELOG_OPEN_RE = /^\{% changelog %}/;
const CHANGELOG_CLOSE_RE = /^\{% endchangelog %}/;
function isOpenToken(tokens, i) {
return (tokens[i].type === 'paragraph_open' &&
tokens[i + 1].type === 'inline' &&
tokens[i + 2].type === 'paragraph_close' &&
CHANGELOG_OPEN_RE.test(tokens[i + 1].content));
}
function isCloseToken(tokens, i) {
var _a;
return (((_a = tokens[i]) === null || _a === void 0 ? void 0 : _a.type) === 'paragraph_open' &&
tokens[i + 1].type === 'inline' &&
tokens[i + 2].type === 'paragraph_close' &&
CHANGELOG_CLOSE_RE.test(tokens[i + 1].content));
}
function isTitle(tokens, i = 0) {
return (tokens[i].type === 'heading_open' &&
tokens[i + 1].type === 'inline' &&
tokens[i + 2].type === 'heading_close');
}
function isImageParagraph(tokens, i = 0) {
var _a;
return (tokens[i].type === 'paragraph_open' &&
tokens[i + 1].type === 'inline' &&
tokens[i + 2].type === 'paragraph_close' &&
((_a = tokens[i + 1].children) === null || _a === void 0 ? void 0 : _a.some((t) => t.type === 'image')));
}
function parseBody(tokens, state) {
var _a, _b;
const { md, env } = state;
const metadataToken = tokens.shift();
if ((metadataToken === null || metadataToken === void 0 ? void 0 : metadataToken.type) !== 'fence') {
throw new Error('Metadata tag not found');
}
let metadata = {};
const rawMetadata = js_yaml_1.default.load(metadataToken.content, {
schema: js_yaml_1.default.JSON_SCHEMA,
});
if (rawMetadata && typeof rawMetadata === 'object') {
metadata = rawMetadata;
}
if (!isTitle(tokens)) {
throw new Error('Title tag not found');
}
const title = tokens.splice(0, 3)[1].content;
let image;
if (isImageParagraph(tokens)) {
const paragraphTokens = tokens.splice(0, 3);
const imageToken = (_b = (_a = paragraphTokens[1]) === null || _a === void 0 ? void 0 : _a.children) === null || _b === void 0 ? void 0 : _b.find((token) => token.type === 'image');
if (imageToken) {
const width = Number(imageToken.attrGet('width'));
const height = Number(imageToken.attrGet('height'));
let ratio;
if (Number.isFinite(width) && Number.isFinite(height)) {
ratio = height / width;
}
let alt = imageToken.attrGet('title') || '';
if (!alt && imageToken.children) {
alt = md.renderer.renderInlineAsText(imageToken.children, md.options, env);
}
image = {
src: imageToken.attrGet('src'),
alt,
ratio,
};
}
}
const description = md.renderer.render(tokens, md.options, env);
if (typeof metadata.storyId === 'number') {
metadata.storyId = String(metadata.storyId);
}
return Object.assign(Object.assign({}, metadata), { title,
image,
description });
}
const changelog = function (md, { extractChangelogs, log, path }) {
const plugin = (state) => {
const { tokens, env } = state;
for (let i = 0, len = tokens.length; i < len; i++) {
const isOpen = isOpenToken(tokens, i);
if (!isOpen)
continue;
const openAt = i;
let isCloseFound = false;
while (i < len) {
i++;
if (isCloseToken(tokens, i)) {
isCloseFound = true;
break;
}
}
if (!isCloseFound) {
log.error(`Changelog close tag in not found: ${(0, chalk_1.bold)(path)}`);
break;
}
const closeAt = i + 2;
if (env && extractChangelogs) {
const content = tokens.slice(openAt, closeAt + 1);
// cut open
content.splice(0, 3);
// cut close
content.splice(-3);
try {
const changelogLocal = parseBody(content, state);
if (!env.changelogs) {
env.changelogs = [];
}
env.changelogs.push(changelogLocal);
}
catch (err) {
log.error(`Changelog error: ${err.message} in ${(0, chalk_1.bold)(path)}`);
continue;
}
}
tokens.splice(openAt, closeAt + 1 - openAt);
len = tokens.length;
i = openAt - 1;
}
};
try {
md.core.ruler.before('curly_attributes', 'changelog', plugin);
}
catch (e) {
md.core.ruler.push('changelog', plugin);
}
};
module.exports = changelog;
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