import 'package:lemmy_api_client/lemmy_api_client.dart'; import 'util/hot_rank.dart'; enum CommentSortType { hot, top, // ignore: constant_identifier_names new_, old, chat, } class CommentTree { CommentView comment; List children; CommentTree(this.comment, [this.children]) { children ??= []; } static List fromList(List comments) { CommentTree gatherChildren(CommentTree parent) { for (var el in comments) { if (el.parentId == parent.comment.id) { parent.children.add(gatherChildren(CommentTree(el))); } } return parent; } var parents = []; // first pass to get all the parents for (var i = 0; i < comments.length; i++) { if (comments[i].parentId == null) { parents.add(CommentTree(comments[i])); } } var result = parents.map(gatherChildren).toList(); return result; } void sort(CommentSortType sortType) { switch (sortType) { case CommentSortType.chat: // throw Exception('i dont do this kinda stuff kido'); return; case CommentSortType.hot: return _sort((b, a) => a.comment.computedHotRank.compareTo(b.comment.computedHotRank)); case CommentSortType.new_: return _sort( (b, a) => a.comment.published.compareTo(b.comment.published)); case CommentSortType.old: return _sort( (b, a) => b.comment.published.compareTo(a.comment.published)); case CommentSortType.top: return _sort((b, a) => a.comment.score.compareTo(b.comment.score)); } } void _sort(int compare(CommentTree a, CommentTree b)) { children.sort(compare); for (var el in children) { el._sort(compare); } } static List sortList( CommentSortType sortType, List comms) { switch (sortType) { case CommentSortType.chat: throw Exception('i dont do this kinda stuff kido'); case CommentSortType.hot: comms.sort((b, a) => a.comment.computedHotRank.compareTo(b.comment.computedHotRank)); for (var i = 0; i < comms.length; i++) { comms[i].sort(sortType); } return comms; case CommentSortType.new_: comms .sort((b, a) => a.comment.published.compareTo(b.comment.published)); for (var i = 0; i < comms.length; i++) { comms[i].sort(sortType); } return comms; case CommentSortType.old: comms .sort((b, a) => b.comment.published.compareTo(a.comment.published)); for (var i = 0; i < comms.length; i++) { comms[i].sort(sortType); } return comms; case CommentSortType.top: comms.sort((b, a) => a.comment.score.compareTo(b.comment.score)); for (var i = 0; i < comms.length; i++) { comms[i].sort(sortType); } return comms; } throw Exception('unreachable'); } }