114 lines
2.3 KiB
JavaScript
114 lines
2.3 KiB
JavaScript
let _instance;
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class Store {
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constructor() {
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if (_instance) return _instance;
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this.data = {};
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_instance = this;
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return _instance;
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}
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set(key, obj) {
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this.data[key] = obj;
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}
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get(key) {
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return this.data[key];
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}
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addComment({ text, id, pid }) {
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const comments = this.data.comments;
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const newComment = {
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comment: {
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id,
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text,
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user: this.get('user'),
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time: new Date(),
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...(pid ? { pid } : {}),
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},
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};
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if (pid) {
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this.pasteReply(newComment);
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} else {
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this.pasteComment(newComment);
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}
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}
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pasteReply(newReply) {
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let again = true;
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const concatReply = (root, reply) => {
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root.replies = root.replies || [];
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root.replies = [reply].concat(root.replies);
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again = false;
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return root;
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}
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const paste = (root, commentObj) => {
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if (!again) return root;
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if (root.comment.id === commentObj.comment.pid) {
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return concatReply(root, commentObj);
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}
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if (root.replies) {
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root.replies = root.replies.map(reply => {
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if (reply.comment.id === commentObj.comment.pid) {
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return concatReply(reply, commentObj);
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} else {
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return paste(reply, commentObj);
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}
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})
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}
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return root;
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};
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this.data.comments = this.data.comments.map(thread => paste(thread, newReply));
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}
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pasteComment(newComment) {
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this.data.comments = [newComment].concat(this.data.comments);
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}
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replaceComment(newComment) {
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let again = true;
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const replace = (thread, comment) => {
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if (!again) return thread;
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if (thread.comment.id === comment.id) {
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thread.comment = comment;
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again = false;
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return thread;
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}
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thread.replies = thread.replies.map(reply => replace(reply, comment));
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return thread;
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};
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this.data.comments = this.data.comments.map(thread => replace(thread, newComment));
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}
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getPinnedComments() {
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return this.data.comments.reduce((acc, thread) => acc.concat(findPinnedComments(thread)), []);
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}
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}
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function findPinnedComments(thread) {
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if (thread.comment.pin) return [thread.comment];
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if (thread.replies) return thread.replies.reduce((acc, thread) => findPinnedComments(thread), []);
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return [];
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}
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export default new Store();
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