Implement Vertex in Post
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@ -1,5 +1,7 @@
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import { Citation } from "./citation";
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import { Member } from "./member";
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import { Vertex } from "../graph.interface";
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import { randomUUID } from "crypto";
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export interface AuthorWeight {
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weight: number;
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@ -11,49 +13,52 @@ export interface CitationWeight {
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citation: Citation;
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}
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export class Post {
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export class Post implements Vertex {
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private static DEFAULT_WEIGHT = 1000;
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private static localStore = new Map<string, Post>;
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private title: string;
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private content: string;
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private authors: AuthorWeight[];
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private citations: CitationWeight[];
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private authorsWeightTotal: number;
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private citationsWeightTotal: number;
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public static getAllPosts() {
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return Array.from(Post.localStore.values());
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}
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constructor (title: string, content: string, authors: Member | Member[]) {
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this.title = title;
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this.content = content;
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this.authors = [];
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this.citations = [];
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this.authorsWeightTotal = 0;
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this.citationsWeightTotal = 0;
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if (!Array.isArray(authors)) authors = [authors];
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for (const author of <Member[]> authors) {
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this.authorsWeightTotal += Post.DEFAULT_WEIGHT;
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this.authors.push({
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weight: Post.DEFAULT_WEIGHT,
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author: author
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});
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}
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public static getPost(id: string) {
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return Post.localStore.get(id);
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}
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public static serialize(post: Post, pretty: boolean = true) {
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//TODO: Need to convert citations and authors to IDs.
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if (!pretty) return JSON.stringify(Post);
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return JSON.stringify(Post, undefined, 2);
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const postProperties = {
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id: post.id,
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title: post.title,
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content: post.content,
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authors: post.authors.map(author => { return {
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author: author.id,
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weight: post.getWeight(author)
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}}),
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citations: post.citations.map(citation => { return {
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citation: citation.id,
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weight: post.getWeight(citation)
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}})
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}
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if (!pretty) return JSON.stringify(postProperties);
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return JSON.stringify(postProperties, undefined, 2);
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}
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public static parse(serializedPost: string) {
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//TODO: Need to retrieve citations and authors from IDs.
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try {
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const parsed = JSON.parse(serializedPost);
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const title = <string> parsed?.title;
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const content = <string> parsed.content;
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const authors = <AuthorWeight[]> parsed.authors;
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const citations = <CitationWeight[]> parsed.citations;
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const post = new Post(title, content, authors[0].author);
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const properties = JSON.parse(serializedPost);
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const id = properties.id;
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const title = properties.title;
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const content = properties.content;
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const authors = properties.authors.map(({author, weight}) => {
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author = Member.getMember(author) || new Member(author);
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return {author, weight};
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});
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const citations = properties.citations.map(({citation, weight}) => {
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citation = Citation.getCitation(citation);
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if (citation) return {citation, weight};
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});
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const post = new Post(id, title, content, authors[0].author);
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for (const author of authors) post.setAuthor(author.author, author.weight);
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for (const citation of citations) post.setCitation(citation.citation, citation.weight);
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return post;
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@ -62,47 +67,84 @@ export class Post {
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}
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}
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public getTitle() { return this.title; }
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public getContent() { return this.content; }
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public getAuthors() { return this.authors.map(({author}) => author); }
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public getCitations() { return this.citations.map(({citation}) => citation); }
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public getAuthorsWeightTotal() { return this.authorsWeightTotal; }
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public getCitationWeightTotal() { return this.citationsWeightTotal; }
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private _id: string;
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private _title: string;
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private _content: string;
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private _authors: AuthorWeight[];
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private _citations: CitationWeight[];
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private _authorsWeightTotal: number;
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private _citationsWeightTotal: number;
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constructor (id: string | null, title: string, content: string, authors: Member | Member[]) {
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this._id = id ? id : randomUUID();
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this._title = title;
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this._content = content;
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this._authors = [];
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this._citations = [];
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this._authorsWeightTotal = 0;
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this._citationsWeightTotal = 0;
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if (!Array.isArray(authors)) authors = [authors];
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for (const author of <Member[]> authors) {
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this._authorsWeightTotal += Post.DEFAULT_WEIGHT;
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this._authors.push({
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weight: Post.DEFAULT_WEIGHT,
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author: author
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});
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}
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Post.localStore.set(this._id, this);
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}
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public get id() { return this._id; }
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public get edges() { return this.citations; }
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public get data() { return Post.serialize(this); }
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public get title() { return this._title; }
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public get content() { return this._content; }
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public get authors() { return this._authors.map(({author}) => author); }
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public get citations() { return this._citations.map(({citation}) => citation); }
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public get authorsWeightTotal() { return this._authorsWeightTotal; }
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public get citationsWeightTotal() { return this._citationsWeightTotal; }
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public setAuthor(author: Member, weight: number = Post.DEFAULT_WEIGHT) {
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this.removeAuthor(author);
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this.authors.push({author, weight});
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this.authorsWeightTotal += weight;
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const index = this.authors.indexOf(author);
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if (index != -1) {
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const current = this._authors[index];
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this._authorsWeightTotal -= current.weight;
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this._authors.splice(index, 1);
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}
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this._authors.push({author, weight});
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this._authorsWeightTotal += weight;
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}
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public removeAuthor(author: Member) {
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const index = this.getAuthors().indexOf(author);
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if (this.authors.length == 1 ) throw new Error("Cannot remove the last author of a post.");
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const index = this.authors.indexOf(author);
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if (index != -1) {
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const current = this.authors[index];
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this.authorsWeightTotal -= current.weight;
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this.authors.splice(index, 1);
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const current = this._authors[index];
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this._authorsWeightTotal -= current.weight;
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this._authors.splice(index, 1);
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}
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}
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public setCitation(citation: Citation, weight: number = Post.DEFAULT_WEIGHT) {
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this.removeCitation(citation);
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this.citations.push({citation, weight});
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this.citationsWeightTotal += weight;
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this._citations.push({citation, weight});
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this._citationsWeightTotal += weight;
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}
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public removeCitation(citation: Citation) {
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const index = this.getCitations().indexOf(citation);
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const index = this.citations.indexOf(citation);
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if (index != -1) {
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const current = this.citations[index];
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this.citationsWeightTotal -= current.weight;
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this.citations.splice(index, 1);
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const current = this._citations[index];
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this._citationsWeightTotal -= current.weight;
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this._citations.splice(index, 1);
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}
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}
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public getWeight(weighted: Member | Citation) {
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const forAuthor = weighted instanceof Member;
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const arr = forAuthor ? this.authors : this.citations;
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const arr = forAuthor ? this._authors : this._citations;
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const key = forAuthor ? "author" : "citation";
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const index = arr.findIndex(item => item[key] == weighted);
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if (index == -1) return -1;
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