mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/DiscussionTools
synced 2024-09-24 19:08:16 +00:00
e5e6fdd3af
Native Range objects are automatically updated when the DOM elements they refer to are affected (e.g. detached from the DOM, or their offset changes because of siblings being added/removed). This seemed harmless or maybe even slightly useful, but it turns out it conflicts with VisualEditor, which has to wrap the entire page in a new DOM node when it opens (and unwrap it when it closes), effectively temporarily detaching it from the DOM, which destroys all our ranges. Just use a plain object that stores the same data as a Range. And when we need to use Range's API, we can simply construct a temporary one. Bug: T241861 Change-Id: Iee64aa3d667877265ef8a59293c202e6478d7fb6
906 lines
28 KiB
JavaScript
906 lines
28 KiB
JavaScript
/* eslint-disable no-console */
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'use strict';
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// DiscussionToolsHooks::getLocalData()
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var
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data = require( './data.json' ),
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moment = require( './lib/moment-timezone/moment-timezone-with-data-1970-2030.js' );
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/**
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* Utilities for detecting and parsing components of discussion pages: signatures, timestamps,
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* comments and threads.
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*
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* @class mw.dt.parser
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*/
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/**
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* Get text of localisation messages in content language.
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*
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* @private
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* @param {string[]} messages
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* @return {string[]}
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*/
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function getMessages( messages ) {
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return messages.map( function ( code ) {
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return data.contLangMessages[ code ];
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} );
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}
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/**
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* Get a regexp that matches timestamps generated using the given date format.
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*
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* This only supports format characters that are used by the default date format in any of
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* MediaWiki's languages, namely: D, d, F, G, H, i, j, l, M, n, Y, xg, xkY (and escape characters),
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* and only dates when MediaWiki existed, let's say 2000 onwards (Thai dates before 1941 are
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* complicated).
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*
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* @param {string} format Date format, as used by MediaWiki
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* @param {string} digits Regular expression matching a single localised digit, e.g. `[0-9]`
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* @param {Object} tzAbbrs Map of localised timezone abbreviations to IANA abbreviations
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* for the local timezone, e.g. `{EDT: "EDT", EST: "EST"}`
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* @return {string} Regular expression
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*/
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function getTimestampRegexp( format, digits, tzAbbrs ) {
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var s, p, num, code, endQuote, tzRegexp, regexp;
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function regexpGroup( regexp ) {
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return '(' + regexp + ')';
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}
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function regexpAlternateGroup( array ) {
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return '(' + array.map( mw.util.escapeRegExp ).join( '|' ) + ')';
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}
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s = '';
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// Adapted from Language::sprintfDate()
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for ( p = 0; p < format.length; p++ ) {
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num = false;
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code = format[ p ];
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if ( code === 'x' && p < format.length - 1 ) {
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code += format[ ++p ];
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}
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if ( code === 'xk' && p < format.length - 1 ) {
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code += format[ ++p ];
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}
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switch ( code ) {
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case 'xx':
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s += 'x';
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break;
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case 'xg':
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s += regexpAlternateGroup( getMessages( [
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'january-gen', 'february-gen', 'march-gen', 'april-gen', 'may-gen', 'june-gen',
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'july-gen', 'august-gen', 'september-gen', 'october-gen', 'november-gen',
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'december-gen'
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] ) );
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break;
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case 'd':
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num = '2';
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break;
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case 'D':
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s += regexpAlternateGroup( getMessages( [
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'sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'
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] ) );
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break;
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case 'j':
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num = '1,2';
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break;
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case 'l':
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s += regexpAlternateGroup( getMessages( [
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'sunday', 'monday', 'tuesday', 'wednesday', 'thursday',
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'friday', 'saturday'
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] ) );
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break;
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case 'F':
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s += regexpAlternateGroup( getMessages( [
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'january', 'february', 'march', 'april', 'may_long', 'june',
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'july', 'august', 'september', 'october', 'november',
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'december'
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] ) );
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break;
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case 'M':
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s += regexpAlternateGroup( getMessages( [
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'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
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'sep', 'oct', 'nov', 'dec'
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] ) );
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break;
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case 'n':
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num = '1,2';
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break;
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case 'Y':
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num = '4';
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break;
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case 'xkY':
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num = '4';
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break;
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case 'G':
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num = '1,2';
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break;
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case 'H':
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num = '2';
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break;
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case 'i':
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num = '2';
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break;
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case '\\':
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// Backslash escaping
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if ( p < format.length - 1 ) {
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s += mw.util.escapeRegExp( format[ ++p ] );
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} else {
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s += mw.util.escapeRegExp( '\\' );
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}
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break;
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case '"':
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// Quoted literal
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if ( p < format.length - 1 ) {
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endQuote = format.indexOf( '"', p + 1 );
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if ( endQuote === -1 ) {
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// No terminating quote, assume literal "
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s += '"';
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} else {
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s += mw.util.escapeRegExp( format.substr( p + 1, endQuote - p - 1 ) );
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p = endQuote;
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}
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} else {
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// Quote at end of string, assume literal "
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s += '"';
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}
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break;
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default:
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s += mw.util.escapeRegExp( format[ p ] );
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}
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if ( num !== false ) {
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s += regexpGroup( digits + '{' + num + '}' );
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}
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}
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tzRegexp = regexpAlternateGroup( Object.keys( tzAbbrs ) );
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// Hardcoded parentheses and space like in Parser::pstPass2
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regexp = s + ' \\(' + tzRegexp + '\\)';
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return regexp;
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}
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/**
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* Get a function that parses timestamps generated using the given date format, based on the result
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* of matching the regexp returned by #getTimestampRegexp.
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*
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* @param {string} format Date format, as used by MediaWiki
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* @param {string|null} digits Localised digits from 0 to 9, e.g. `0123456789`
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* @param {string} localTimezone Local timezone IANA name, e.g. `America/New_York`
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* @param {Object} tzAbbrs Map of localised timezone abbreviations to IANA abbreviations
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* for the local timezone, e.g. `{EDT: "EDT", EST: "EST"}`
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* @return {Function} Parser function
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* @return {Array} return.match Regexp match data
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* @return {Object} return.return Moment object
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*/
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function getTimestampParser( format, digits, localTimezone, tzAbbrs ) {
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var p, code, endQuote, matchingGroups = [];
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for ( p = 0; p < format.length; p++ ) {
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code = format[ p ];
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if ( code === 'x' && p < format.length - 1 ) {
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code += format[ ++p ];
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}
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if ( code === 'xk' && p < format.length - 1 ) {
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code += format[ ++p ];
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}
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switch ( code ) {
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case 'xx':
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break;
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case 'xg':
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case 'd':
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case 'j':
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case 'D':
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case 'l':
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case 'F':
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case 'M':
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case 'n':
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case 'Y':
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case 'xkY':
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case 'G':
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case 'H':
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case 'i':
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matchingGroups.push( code );
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break;
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case '\\':
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// Backslash escaping
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if ( p < format.length - 1 ) {
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++p;
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}
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break;
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case '"':
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// Quoted literal
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if ( p < format.length - 1 ) {
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endQuote = format.indexOf( '"', p + 1 );
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if ( endQuote !== -1 ) {
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p = endQuote;
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}
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}
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break;
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default:
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break;
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}
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}
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function untransformDigits( text ) {
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if ( !digits ) {
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return text;
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}
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return text.replace(
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new RegExp( '[' + digits + ']', 'g' ),
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function ( m ) {
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return digits.indexOf( m );
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}
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);
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}
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return function timestampParser( match ) {
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var
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year = 0,
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monthIdx = 0,
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day = 0,
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hour = 0,
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minute = 0,
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tzAbbr,
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i, code, text,
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date;
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for ( i = 0; i < matchingGroups.length; i++ ) {
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code = matchingGroups[ i ];
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text = match[ i + 1 ];
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switch ( code ) {
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case 'xg':
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monthIdx = getMessages( [
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'january-gen', 'february-gen', 'march-gen', 'april-gen', 'may-gen', 'june-gen',
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'july-gen', 'august-gen', 'september-gen', 'october-gen', 'november-gen',
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'december-gen'
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] ).indexOf( text );
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break;
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case 'd':
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case 'j':
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day = Number( untransformDigits( text ) );
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break;
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case 'D':
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case 'l':
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// Day of the week - unused
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break;
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case 'F':
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monthIdx = getMessages( [
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'january', 'february', 'march', 'april', 'may_long', 'june',
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'july', 'august', 'september', 'october', 'november',
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'december'
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] ).indexOf( text );
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break;
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case 'M':
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monthIdx = getMessages( [
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'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug',
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'sep', 'oct', 'nov', 'dec'
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] ).indexOf( text );
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break;
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case 'n':
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monthIdx = Number( untransformDigits( text ) ) - 1;
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break;
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case 'Y':
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year = Number( untransformDigits( text ) );
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break;
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case 'xkY':
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// Thai year
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year = Number( untransformDigits( text ) ) - 543;
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break;
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case 'G':
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case 'H':
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hour = Number( untransformDigits( text ) );
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break;
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case 'i':
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minute = Number( untransformDigits( text ) );
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break;
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default:
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throw new Error( 'Not implemented' );
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}
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}
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// The last matching group is the timezone abbreviation
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tzAbbr = tzAbbrs[ match[ i + 1 ] ];
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// Most of the time, the timezone abbreviation is not necessary to parse the date, since we
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// can assume all times are in the wiki's local timezone.
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date = moment.tz( [ year, monthIdx, day, hour, minute ], localTimezone );
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// But during the "fall back" at the end of DST, some times will happen twice. Per the docs,
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// "Moment Timezone handles this by always using the earlier instance of a duplicated hour."
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// https://momentjs.com/timezone/docs/#/using-timezones/parsing-ambiguous-inputs/
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// Since the timezone abbreviation disambiguates the DST/non-DST times, we can detect when
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// that behavior was incorrect...
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if ( date.zoneAbbr() !== tzAbbr ) {
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// ...and force the correct parsing. I can't find proper documentation for this feature,
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// but this pull request explains it: https://github.com/moment/moment-timezone/pull/101
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moment.tz.moveAmbiguousForward = true;
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date = moment.tz( [ year, monthIdx, day, hour, minute ], localTimezone );
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moment.tz.moveAmbiguousForward = false;
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if ( date.zoneAbbr() !== tzAbbr ) {
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// This should not be possible for "genuine" timestamps generated by MediaWiki.
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// But bots and humans get it wrong when marking up unsigned comments…
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// https://pl.wikipedia.org/w/index.php?title=Wikipedia:Kawiarenka/Artykuły&diff=prev&oldid=54772606
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console.log( 'Timestamp has timezone abbreviation for the wrong time: ' + match[ 0 ] );
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} else {
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console.log( 'Ambiguous time at DST switchover was parsed: ' + match[ 0 ] );
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}
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}
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return date;
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};
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}
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/**
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* Get a regexp that matches timestamps in the local date format.
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*
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* This calls #getTimestampRegexp with predefined data for the current wiki.
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*
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* @private
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* @return {string} Regular expression
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*/
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function getLocalTimestampRegexp() {
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var
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df = data.dateFormat,
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digitsRegexp = mw.config.get( 'wgTranslateNumerals' ) ? '[' + data.digits + ']' : '\\d',
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dfRegexp = getTimestampRegexp( df, digitsRegexp, data.timezones );
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return dfRegexp;
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}
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/**
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* Get a function that parses timestamps in the local date format, based on the result
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* of matching the regexp returned by #getLocalTimestampRegexp.
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*
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* This calls #getTimestampParser with predefined data for the current wiki.
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*
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* @private
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* @return {Function} Parser function
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* @return {Array} return.match Regexp match data
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* @return {Date} return.return
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*/
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function getLocalTimestampParser() {
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var
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df = data.dateFormat,
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digits = mw.config.get( 'wgTranslateNumerals' ) ? data.digits : null,
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parseFunction = getTimestampParser( df, digits, data.localTimezone, data.timezones );
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return parseFunction;
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}
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/**
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* Callback for document.createTreeWalker that will skip over nodes where we don't want to detect
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* comments (or section headings).
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*
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* @param {Node} node
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* @return {number} Appropriate NodeFilter constant
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*/
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function acceptOnlyNodesAllowingComments( node ) {
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// The table of contents has a heading that gets erroneously detected as a section
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if ( node.id === 'toc' ) {
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return NodeFilter.FILTER_REJECT;
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}
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return NodeFilter.FILTER_ACCEPT;
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}
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/**
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* Find all timestamps within a DOM subtree.
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*
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* @param {Node} rootNode Node to search
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* @return {Array[]} Results. Each result is a two-element array.
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* @return {Text} return.0 Text node containing the timestamp
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* @return {Array} return.1 Regexp match data, which specifies the location of the match, and which
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* can be parsed using #getLocalTimestampParser
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*/
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function findTimestamps( rootNode ) {
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var
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matches = [],
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treeWalker = rootNode.ownerDocument.createTreeWalker(
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rootNode,
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NodeFilter.SHOW_TEXT,
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acceptOnlyNodesAllowingComments,
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false
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),
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dateRegexp = getLocalTimestampRegexp(),
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node, match;
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while ( ( node = treeWalker.nextNode() ) ) {
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// Technically, there could be multiple matches in a single text node. However, the ultimate
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// point of this is to find the signatures which precede the timestamps, and any later
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// timestamps in the text node can't be directly preceded by a signature (as we require them to
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// have links), so we only concern ourselves with the first match.
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if ( ( match = node.nodeValue.match( dateRegexp ) ) ) {
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matches.push( [ node, match ] );
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}
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}
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return matches;
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}
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/**
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* Get the MediaWiki page title from an URI.
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*
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* @private
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* @param {string} uri
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* @return {string|null} Page title, or null if this isn't a link to a page
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*/
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function getPageTitleFromUri( uri ) {
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var articlePathRegexp, match;
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uri = new mw.Uri( uri );
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articlePathRegexp = new RegExp(
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mw.util.escapeRegExp( mw.config.get( 'wgArticlePath' ) )
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.replace( mw.util.escapeRegExp( '$1' ), '(.*)' )
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);
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if ( ( match = uri.path.match( articlePathRegexp ) ) ) {
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return decodeURIComponent( match[ 1 ] );
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}
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if ( uri.query.title ) {
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return uri.query.title;
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}
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return null;
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}
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/**
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* Find a user signature preceding a timestamp.
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*
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* The signature includes the timestamp node.
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*
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* A signature must contain at least one link to the user's userpage, discussion page or
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* contributions (and may contain other links). The link may be nested in other elements.
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*
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* @private
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* @param {Text} timestampNode Text node
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* @return {Array} Result, a two-element array
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* @return {Node[]} return.0 Sibling nodes comprising the signature (with `timestampNode`
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* as the last element)
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* @return {string|null} return.1 Username, null for unsigned comments
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*/
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function findSignature( timestampNode ) {
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var
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node = timestampNode,
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sigNodes = [ node ],
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sigUsername = null,
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length = 0,
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lastLinkNode = timestampNode,
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links, nodes;
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while ( ( node = node.previousSibling ) && length < data.signatureScanLimit ) {
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sigNodes.push( node );
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length += ( node.textContent || '' ).length;
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if ( !node.tagName ) {
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continue;
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}
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links = [];
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if ( node.tagName.toLowerCase() === 'a' ) {
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links.push( node );
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} else {
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// Handle links nested in formatting elements.
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// Helpful accidental feature: users whose signature is not detected in full (due to
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// text formatting) can just wrap it in a <span> to fix that.
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// "Ten Pound Hammer • (What did I screw up now?)"
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// "« Saper // dyskusja »"
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nodes = node.getElementsByTagName( 'a' );
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links.push.apply( links, nodes );
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}
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if ( !links.length ) {
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continue;
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}
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// Use .some() rather than .every() to permit vanity links
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// "TonyTheTiger (T / C / WP:FOUR / WP:CHICAGO / WP:WAWARD)"
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// eslint-disable-next-line no-loop-func
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if ( links.some( function ( link ) {
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var username, title, mwTitle;
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title = getPageTitleFromUri( link.href );
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if ( !title ) {
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return false;
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}
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mwTitle = mw.Title.newFromText( title );
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if (
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mwTitle.getNamespaceId() === mw.config.get( 'wgNamespaceIds' ).user ||
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mwTitle.getNamespaceId() === mw.config.get( 'wgNamespaceIds' ).user_talk
|
|
) {
|
|
username = mwTitle.getMainText();
|
|
if ( username.indexOf( '/' ) !== -1 ) {
|
|
return false;
|
|
}
|
|
} else if (
|
|
mwTitle.getNamespaceId() === mw.config.get( 'wgNamespaceIds' ).special &&
|
|
mwTitle.getMainText().split( '/' )[ 0 ] === data.specialContributionsName
|
|
) {
|
|
username = mwTitle.getMainText().split( '/' )[ 1 ];
|
|
// Users may link to their contributions with non-standard name
|
|
username = mw.Title.makeTitle( mw.config.get( 'wgNamespaceIds' ).user, username ).getMainText();
|
|
}
|
|
if ( !username ) {
|
|
return false;
|
|
}
|
|
if ( mw.util.isIPv6Address( username ) ) {
|
|
// Bot-generated links "Preceding unsigned comment added by" have non-standard case
|
|
username = username.toUpperCase();
|
|
}
|
|
|
|
// Check that every link points to the same user
|
|
if ( !sigUsername ) {
|
|
sigUsername = username;
|
|
}
|
|
return username === sigUsername;
|
|
} ) ) {
|
|
lastLinkNode = node;
|
|
}
|
|
// Keep looking if a node with links wasn't a link to a user page
|
|
// "Doc James (talk · contribs · email)"
|
|
}
|
|
// Pop excess text nodes
|
|
while ( sigNodes[ sigNodes.length - 1 ] !== lastLinkNode ) {
|
|
sigNodes.pop();
|
|
}
|
|
return [ sigNodes, sigUsername ];
|
|
}
|
|
|
|
/**
|
|
* Get the indent level of a node, relative to its ancestor node.
|
|
*
|
|
* The indent level is the number of lists inside of which it is nested.
|
|
*
|
|
* @private
|
|
* @param {Node} node
|
|
* @param {Node} rootNode Node to stop counting at
|
|
* @return {number}
|
|
*/
|
|
function getIndentLevel( node, rootNode ) {
|
|
var indent = 0, tagName;
|
|
while ( node ) {
|
|
if ( node === rootNode ) {
|
|
break;
|
|
}
|
|
tagName = node.tagName && node.tagName.toLowerCase();
|
|
if ( tagName === 'li' || tagName === 'dl' ) {
|
|
indent++;
|
|
}
|
|
node = node.parentNode;
|
|
}
|
|
return indent;
|
|
}
|
|
|
|
/**
|
|
* Return the next leaf node in the tree order that is not an empty or whitespace-only text node.
|
|
*
|
|
* In other words, this returns a Text node with content other than whitespace, or an Element node
|
|
* with no children, that follows the given node in the HTML source.
|
|
*
|
|
* @private
|
|
* @param {Node} node Node to start searching at. If it isn't a leaf node, its children are ignored.
|
|
* @param {Node} rootNode Node to stop searching at
|
|
* @return {Node|null}
|
|
*/
|
|
function nextInterestingLeafNode( node, rootNode ) {
|
|
var treeWalker = rootNode.ownerDocument.createTreeWalker(
|
|
rootNode,
|
|
// eslint-disable-next-line no-bitwise
|
|
NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_TEXT,
|
|
function ( n ) {
|
|
// Ignore this node and its descendants
|
|
// (unless it's the root node, this is a special case for "fakeHeading" handling)
|
|
if ( node !== rootNode && ( n === node || n.parentNode === node ) ) {
|
|
return NodeFilter.FILTER_REJECT;
|
|
}
|
|
if ( n.nodeType === Node.TEXT_NODE && n.textContent.trim() !== '' ) {
|
|
return NodeFilter.FILTER_ACCEPT;
|
|
}
|
|
if ( n.nodeType === Node.ELEMENT_NODE && !n.firstChild ) {
|
|
return NodeFilter.FILTER_ACCEPT;
|
|
}
|
|
return NodeFilter.FILTER_SKIP;
|
|
},
|
|
false
|
|
);
|
|
treeWalker.currentNode = node;
|
|
treeWalker.nextNode();
|
|
return treeWalker.currentNode;
|
|
}
|
|
|
|
/**
|
|
* Get all discussion comments (and headings) within a DOM subtree.
|
|
*
|
|
* This returns a flat list, use #groupThreads to associate replies to original messages and get a
|
|
* tree structure starting at section headings.
|
|
*
|
|
* For example, for a MediaWiki discussion like this (we're dealing with HTML DOM here, the wikitext
|
|
* syntax is just for illustration):
|
|
*
|
|
* == A ==
|
|
* B. ~~~~
|
|
* : C.
|
|
* : C. ~~~~
|
|
* :: D. ~~~~
|
|
* ::: E. ~~~~
|
|
* ::: F. ~~~~
|
|
* : G. ~~~~
|
|
* H. ~~~~
|
|
* : I. ~~~~
|
|
*
|
|
* This function would return a structure like:
|
|
*
|
|
* [
|
|
* { type: 'heading', level: 0, range: (h2: A) },
|
|
* { type: 'comment', level: 1, range: (p: B) },
|
|
* { type: 'comment', level: 2, range: (li: C, li: C) },
|
|
* { type: 'comment', level: 3, range: (li: D) },
|
|
* { type: 'comment', level: 4, range: (li: E) },
|
|
* { type: 'comment', level: 4, range: (li: F) },
|
|
* { type: 'comment', level: 2, range: (li: G) },
|
|
* { type: 'comment', level: 1, range: (p: H) },
|
|
* { type: 'comment', level: 2, range: (li: I) }
|
|
* ]
|
|
*
|
|
* @param {Node} rootNode
|
|
* @return {Object[]} Results. Each result is an object.
|
|
* @return {string} return.type `heading` or `comment`
|
|
* @return {Object} return.range Object describing the extent of the comment, including the
|
|
* signature and timestamp. It has the same properties as a Range object: `startContainer`,
|
|
* `startOffset`, `endContainer`, `endOffset` (we don't use a real Range because they change
|
|
* magically when the DOM structure changes).
|
|
* @return {number} return.level Indentation level of the comment. Headings are `0`, comments start
|
|
* at `1`.
|
|
* @return {Object} [return.timestamp] Timestamp (Moment object), undefined for headings
|
|
* @return {string|null} [return.author] Comment author's username, null for unsigned comments,
|
|
* undefined for headings
|
|
*/
|
|
function getComments( rootNode ) {
|
|
var
|
|
dfParser = getLocalTimestampParser(),
|
|
comments = [],
|
|
timestamps, nextTimestamp, treeWalker,
|
|
node, range, fakeHeading, curComment, startNode, match, startLevel, endLevel;
|
|
|
|
timestamps = findTimestamps( rootNode );
|
|
|
|
treeWalker = rootNode.ownerDocument.createTreeWalker(
|
|
rootNode,
|
|
// eslint-disable-next-line no-bitwise
|
|
NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_TEXT,
|
|
acceptOnlyNodesAllowingComments,
|
|
false
|
|
);
|
|
|
|
// Placeholder heading in case there are comments in the 0th section
|
|
range = {
|
|
startContainer: rootNode,
|
|
startOffset: 0,
|
|
endContainer: rootNode,
|
|
endOffset: 0
|
|
};
|
|
fakeHeading = {
|
|
type: 'heading',
|
|
range: range,
|
|
level: 0
|
|
};
|
|
|
|
curComment = fakeHeading;
|
|
|
|
nextTimestamp = 0;
|
|
while ( ( node = treeWalker.nextNode() ) ) {
|
|
if ( node.tagName && node.tagName.match( /^h[1-6]$/i ) ) {
|
|
range = {
|
|
startContainer: node,
|
|
startOffset: 0,
|
|
endContainer: node,
|
|
endOffset: node.childNodes.length
|
|
};
|
|
curComment = {
|
|
type: 'heading',
|
|
range: range,
|
|
level: 0
|
|
};
|
|
comments.push( curComment );
|
|
} else if ( timestamps[ nextTimestamp ] && node === timestamps[ nextTimestamp ][ 0 ] ) {
|
|
// Everything from last comment up to here is the next comment
|
|
startNode = nextInterestingLeafNode( curComment.range.endContainer, rootNode );
|
|
match = timestamps[ nextTimestamp ][ 1 ];
|
|
range = {
|
|
startContainer: startNode.parentNode,
|
|
startOffset: Array.prototype.indexOf.call( startNode.parentNode.childNodes, startNode ),
|
|
endContainer: node,
|
|
endOffset: match.index + match[ 0 ].length
|
|
};
|
|
|
|
startLevel = getIndentLevel( startNode, rootNode ) + 1;
|
|
endLevel = getIndentLevel( node, rootNode ) + 1;
|
|
if ( startLevel !== endLevel ) {
|
|
console.log( 'Comment starts and ends with different indentation', startNode, node );
|
|
}
|
|
|
|
// Avoid generating multiple comments when there is more than one signature on a single "line".
|
|
// Often this is done when someone edits their comment later and wants to add a note about that.
|
|
// (Or when another person corrects a typo, or strikes out a comment, etc.) Multiple comments
|
|
// within one paragraph/listitem result in a confusing double "Reply" button, and we also have
|
|
// no way to indicate which one you're replying to (this might matter in the future for
|
|
// notifications or something).
|
|
if (
|
|
nextTimestamp > 0 &&
|
|
timestamps[ nextTimestamp ][ 0 ].parentNode === timestamps[ nextTimestamp - 1 ][ 0 ].parentNode
|
|
) {
|
|
// Merge this with the previous comment.
|
|
// (As a result, the comment's timestamp node is in the middle of it, this should be okay?)
|
|
curComment.range.endContainer = node;
|
|
curComment.range.endOffset = match.index + match[ 0 ].length;
|
|
curComment.level = Math.min( Math.min( startLevel, endLevel ), curComment.level );
|
|
// Use previous comment's author and timestamp, unless it has no author, in which case it's
|
|
// probably not a real comment, but just a false match due to a copypasted timestamp.
|
|
if ( !curComment.author ) {
|
|
curComment.timestamp = dfParser( match );
|
|
curComment.author = findSignature( node )[ 1 ];
|
|
}
|
|
|
|
nextTimestamp++;
|
|
continue;
|
|
}
|
|
|
|
curComment = {
|
|
type: 'comment',
|
|
timestamp: dfParser( match ),
|
|
author: findSignature( node )[ 1 ],
|
|
range: range,
|
|
// Should this use the indent level of `startNode` or `node`?
|
|
level: Math.min( startLevel, endLevel )
|
|
};
|
|
comments.push( curComment );
|
|
nextTimestamp++;
|
|
}
|
|
}
|
|
|
|
// Insert the fake placeholder heading if there are any comments in the 0th section
|
|
// (before the first real heading)
|
|
if ( comments.length && comments[ 0 ].type !== 'heading' ) {
|
|
comments.unshift( fakeHeading );
|
|
}
|
|
|
|
return comments;
|
|
}
|
|
|
|
/**
|
|
* Group discussion comments into threads and associate replies to original messages.
|
|
*
|
|
* Each thread must begin with a heading. Original messages in the thread are treated as replies to
|
|
* its heading. Other replies are associated based on the order and indentation level.
|
|
*
|
|
* Note that the objects in `comments` are extended in-place with the additional data.
|
|
*
|
|
* For example, for a MediaWiki discussion like this (we're dealing with HTML DOM here, the wikitext
|
|
* syntax is just for illustration):
|
|
*
|
|
* == A ==
|
|
* B. ~~~~
|
|
* : C.
|
|
* : C. ~~~~
|
|
* :: D. ~~~~
|
|
* ::: E. ~~~~
|
|
* ::: F. ~~~~
|
|
* : G. ~~~~
|
|
* H. ~~~~
|
|
* : I. ~~~~
|
|
*
|
|
* This function would return a structure like:
|
|
*
|
|
* [
|
|
* { type: 'heading', level: 0, range: (h2: A), replies: [
|
|
* { type: 'comment', level: 1, range: (p: B), replies: [
|
|
* { type: 'comment', level: 2, range: (li: C, li: C), replies: [
|
|
* { type: 'comment', level: 3, range: (li: D), replies: [
|
|
* { type: 'comment', level: 4, range: (li: E), replies: [] },
|
|
* { type: 'comment', level: 4, range: (li: F), replies: [] },
|
|
* ] },
|
|
* ] },
|
|
* { type: 'comment', level: 2, range: (li: G), replies: [] },
|
|
* ] },
|
|
* { type: 'comment', level: 1, range: (p: H), replies: [
|
|
* { type: 'comment', level: 2, range: (li: I), replies: [] },
|
|
* ] },
|
|
* ] },
|
|
* ]
|
|
*
|
|
* @param {Object} comments Result of #getComments
|
|
* @return {Object[]} Tree structure of comments, using the same objects as `comments`. Top-level
|
|
* items are the headings. The following properties are added:
|
|
* @return {string} return.id Unique ID (within the page) for this comment, intended to be used to
|
|
* find this comment in other revisions of the same page
|
|
* @return {Object[]} return.replies Comment objects which are replies to this comment
|
|
* @return {Object|null} return.parent Comment object which this is a reply to (null for headings)
|
|
*/
|
|
function groupThreads( comments ) {
|
|
var
|
|
threads = [],
|
|
replies = [],
|
|
commentsById = {},
|
|
i, comment, id, number;
|
|
|
|
for ( i = 0; i < comments.length; i++ ) {
|
|
comment = comments[ i ];
|
|
|
|
if ( comment.level === 0 ) {
|
|
// We don't need ids for section headings right now, but we might in the future
|
|
// e.g. if we allow replying directly to sections (adding top-level comments)
|
|
id = null;
|
|
} else {
|
|
// username+timestamp
|
|
id = [
|
|
comment.author || '',
|
|
comment.timestamp.toISOString()
|
|
].join( '|' );
|
|
|
|
// If there would be multiple comments with the same ID (i.e. the user left multiple comments
|
|
// in one edit, or within a minute), append sequential numbers
|
|
number = 0;
|
|
while ( commentsById[ id + '|' + number ] ) {
|
|
number++;
|
|
}
|
|
id = id + '|' + number;
|
|
}
|
|
|
|
if ( id ) {
|
|
commentsById[ id ] = comment;
|
|
}
|
|
|
|
// This modifies the original objects in `comments`!
|
|
comment.id = id;
|
|
comment.replies = [];
|
|
comment.parent = null;
|
|
|
|
if ( replies.length < comment.level ) {
|
|
// Someone skipped an indentation level (or several). Pretend that the previous reply
|
|
// covers multiple indentation levels, so that following comments get connected to it.
|
|
console.log( 'Comment skips indentation level', comment.range );
|
|
while ( replies.length < comment.level ) {
|
|
replies[ replies.length ] = replies[ replies.length - 1 ];
|
|
}
|
|
}
|
|
|
|
if ( comment.level === 0 ) {
|
|
// new root (thread)
|
|
threads.push( comment );
|
|
} else if ( replies[ comment.level - 1 ] ) {
|
|
// add as a reply to closest less nested comment
|
|
replies[ comment.level - 1 ].replies.push( comment );
|
|
comment.parent = replies[ comment.level - 1 ];
|
|
} else {
|
|
console.log( 'Comment could not be connected to a thread', comment.range );
|
|
}
|
|
|
|
replies[ comment.level ] = comment;
|
|
// cut off more deeply nested replies
|
|
replies.length = comment.level + 1;
|
|
}
|
|
|
|
return threads;
|
|
}
|
|
|
|
/**
|
|
* Get the list of authors involved in a comment and its replies.
|
|
*
|
|
* You probably want to pass a thread root here (a heading).
|
|
*
|
|
* @param {Object} comment Comment object, as returned by #groupThreads
|
|
* @return {Object} Object with comment author usernames as keys
|
|
*/
|
|
function getAuthors( comment ) {
|
|
var authors = {};
|
|
if ( comment.author ) {
|
|
authors[ comment.author ] = true;
|
|
}
|
|
// Get the set of authors in the same format from each reply, and merge them all
|
|
authors = comment.replies.map( getAuthors ).reduce( function ( a, b ) {
|
|
return $.extend( a, b );
|
|
}, authors );
|
|
return authors;
|
|
}
|
|
|
|
module.exports = {
|
|
findTimestamps: findTimestamps,
|
|
getLocalTimestampParser: getLocalTimestampParser,
|
|
getTimestampRegexp: getTimestampRegexp,
|
|
getTimestampParser: getTimestampParser,
|
|
getComments: getComments,
|
|
groupThreads: groupThreads,
|
|
findSignature: findSignature,
|
|
getAuthors: getAuthors
|
|
};
|