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const CommentItem = require( './CommentItem.js' );
const HeadingItem = require( './HeadingItem.js' );
const ThreadItem = require( './ThreadItem.js' );
/**
* Groups thread items (headings and comments) generated by parsing a discussion page.
*
* @class ThreadItemSet
*/
function ThreadItemSet() {
this.threadItems = [];
this.commentItems = [];
this.threadItemsByName = {};
this.threadItemsById = {};
this.threads = [];
}
OO.initClass( ThreadItemSet );
/**
* Create a new ThreadItemSet from a JSON serialization
*
* @param {Array} threads Hash object
* @param {HTMLElement} rootNode
* @param {mw.dt.Parser} parser
* @return {ThreadItemSet}
*/
ThreadItemSet.static.newFromJSON = function ( threads, rootNode, parser ) {
const result = new ThreadItemSet();
function infuse( itemHash, parent ) {
const item = ThreadItem.static.newFromJSON( itemHash, rootNode );
result.addThreadItem( item );
item.replies = itemHash.replies.map( ( replyHash ) => infuse( replyHash, item ) );
item.parent = parent;
return item;
}
threads.forEach( ( itemHash ) => {
infuse( itemHash, null );
} );
// Calculate names (currently not stored in the metadata) - can't be done
// in the above loop because we have to wait until we have all the
// replies.
parser.computeIdsAndNames( result );
return result;
};
/**
* @param {ThreadItem} item
*/
ThreadItemSet.prototype.addThreadItem = function ( item ) {
this.threadItems.push( item );
if ( item instanceof CommentItem ) {
this.commentItems.push( item );
}
if ( item instanceof HeadingItem ) {
this.threads.push( item );
}
};
/**
* @return {boolean}
*/
ThreadItemSet.prototype.isEmpty = function () {
return this.threadItems.length === 0;
};
/**
* @param {ThreadItem} item
*/
ThreadItemSet.prototype.updateIdAndNameMaps = function ( item ) {
if ( !this.threadItemsByName[ item.name ] ) {
this.threadItemsByName[ item.name ] = [];
}
this.threadItemsByName[ item.name ].push( item );
this.threadItemsById[ item.id ] = item;
};
/**
* Get all discussion comments (and headings) within a DOM subtree.
*
* This returns a flat list, use #getThreads to 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:
*
* [
* HeadingItem( { level: 0, range: (h2: A) } ),
* CommentItem( { level: 1, range: (p: B) } ),
* CommentItem( { level: 2, range: (li: C, li: C) } ),
* CommentItem( { level: 3, range: (li: D) } ),
* CommentItem( { level: 4, range: (li: E) } ),
* CommentItem( { level: 4, range: (li: F) } ),
* CommentItem( { level: 2, range: (li: G) } ),
* CommentItem( { level: 1, range: (p: H) } ),
* CommentItem( { level: 2, range: (li: I) } )
* ]
*
* @return {ThreadItem[]} Thread items
*/
ThreadItemSet.prototype.getThreadItems = function () {
return this.threadItems;
};
/**
* Same as getFlatThreadItems, but only returns the CommentItems
*
* @return {CommentItem[]} Comment items
*/
ThreadItemSet.prototype.getCommentItems = function () {
return this.commentItems;
};
/**
* Find ThreadItems by their name
*
* This will usually return a single-element array, but it may return multiple comments if they're
* indistinguishable by name. In that case, use their IDs to disambiguate.
*
* @param {string} name Name
* @return {ThreadItem[]} Thread items, empty array if not found
*/
ThreadItemSet.prototype.findCommentsByName = function ( name ) {
return this.threadItemsByName[ name ] || [];
};
/**
* Find a ThreadItem by its ID
*
* @param {string} id ID
* @return {ThreadItem|null} Thread item, null if not found
*/
ThreadItemSet.prototype.findCommentById = function ( id ) {
return this.threadItemsById[ id ] || null;
};
/**
* 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:
*
* [
* HeadingItem( { level: 0, range: (h2: A), replies: [
* CommentItem( { level: 1, range: (p: B), replies: [
* CommentItem( { level: 2, range: (li: C, li: C), replies: [
* CommentItem( { level: 3, range: (li: D), replies: [
* CommentItem( { level: 4, range: (li: E), replies: [] } ),
* CommentItem( { level: 4, range: (li: F), replies: [] } ),
* ] } ),
* ] } ),
* CommentItem( { level: 2, range: (li: G), replies: [] } ),
* ] } ),
* CommentItem( { level: 1, range: (p: H), replies: [
* CommentItem( { level: 2, range: (li: I), replies: [] } ),
* ] } ),
* ] } )
* ]
*
* @return {HeadingItem[]} Tree structure of comments, top-level items are the headings.
*/
ThreadItemSet.prototype.getThreads = function () {
return this.threads;
};
module.exports = ThreadItemSet;