DataAccess changes
- changed data access structure - changed graphql schema - changed create-tables sql script (added vote_type to votes table)pull/1/head
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abstract class DataObject {
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protected dataLoaded: boolean = false;
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constructor(public id: number, protected row?: any) {
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}
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protected abstract loadData(): Promise<void>;
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protected loadDataIfNotExists() {
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if (this.dataLoaded) {
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this.loadData();
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}
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}
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}
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import {queryHelper, VoteType} from "./index";
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import {User} from "./User";
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export class Post extends DataObject {
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public readonly id: number;
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private $upvotes: number;
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private $downvotes: number;
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private $createdAt: string;
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private $content: string;
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private $author: number;
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private $type: string;
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/**
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* Returns the upvotes of a post.
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*/
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public async upvotes(): Promise<number> {
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this.loadDataIfNotExists();
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return this.$upvotes;
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}
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/**
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* Returns the downvotes of the post
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*/
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public async downvotes(): Promise<number> {
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this.loadDataIfNotExists();
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return this.$downvotes;
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}
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/**
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* The content of the post (markdown)
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*/
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public async content(): Promise<string> {
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this.loadDataIfNotExists();
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return this.$content;
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}
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/**
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* The date the post was created at.
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*/
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public async createdAt(): Promise<string> {
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this.loadDataIfNotExists();
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return this.$createdAt;
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}
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/**
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* The autor of the post.
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*/
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public async author(): Promise<User> {
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this.loadDataIfNotExists();
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return new User(this.$author);
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}
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/**
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* Deletes the post.
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*/
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public async delete(): Promise<void> {
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const query = await queryHelper.first({
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text: "DELETE FROM posts WHERE id = $1",
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values: [this.id],
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});
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}
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/**
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* The type of vote the user performed on the post.
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*/
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public async userVote(userId: number): Promise<VoteType> {
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const result = await queryHelper.first({
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text: "SELECT vote_type FROM votes WHERE user_id = $1 AND item_id = $2",
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values: [userId, this.id],
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});
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if (result) {
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return result.vote_type;
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} else {
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return null;
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}
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}
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/**
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* Loads the data from the database if needed.
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*/
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protected async loadData(): Promise<void> {
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let result: any;
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if (this.row) {
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result = this.row;
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} else {
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result = await queryHelper.first({
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text: "SELECT * FROM posts WHERE posts.id = $1",
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values: [this.id],
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});
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}
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if (result) {
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this.$author = result.author;
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this.$content = result.content;
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this.$downvotes = result.downvotes;
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this.$upvotes = result.upvotes;
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this.$createdAt = result.created_at;
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this.$type = result.type;
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this.dataLoaded = true;
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}
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}
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}
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import {queryHelper} from "./index";
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import {Post} from "./Post";
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export class User extends DataObject {
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private $name: string;
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private $handle: string;
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private $email: string;
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private $greenpoints: number;
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private $joinedAt: string;
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/**
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* The name of the user
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*/
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public async name(): Promise<string> {
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this.loadDataIfNotExists();
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return this.$name;
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}
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/**
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* Sets the username of the user
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* @param name
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*/
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public async setName(name: string): Promise<string> {
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const result = await queryHelper.first({
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text: "UPDATE TABLE users SET name = $1 WHERE id = $2",
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values: [name, this.id],
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});
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return result.name;
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}
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/**
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* The unique handle of the user.
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*/
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public async handle(): Promise<string> {
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this.loadDataIfNotExists();
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return this.$handle;
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}
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/**
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* Updates the handle of the user
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*/
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public async setHandle(handle: string): Promise<string> {
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const result = await queryHelper.first({
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text: "UPDATE TABLE users SET handle = $1 WHERE id = $2",
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values: [handle, this.id],
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});
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return result.handle;
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}
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/**
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* The email of the user
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*/
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public async email(): Promise<string> {
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this.loadDataIfNotExists();
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return this.$email;
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}
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/**
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* Sets the email of the user
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* @param email
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*/
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public async setEmail(email: string): Promise<string> {
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const result = await queryHelper.first({
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text: "UPDATE TABLE users SET email = $1 WHERE users.id = $2 RETURNING email",
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values: [email, this.id],
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});
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return result.email;
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}
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/**
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* The number of greenpoints of the user
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*/
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public async greenpoints(): Promise<number> {
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this.loadDataIfNotExists();
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return this.$greenpoints;
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}
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/**
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* Sets the greenpoints of a user.
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* @param points
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*/
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public async setGreenpoints(points: number): Promise<number> {
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const result = await queryHelper.first({
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text: "UPDATE users SET greenpoints = $1 WHERE id = $2 RETURNING greenpoints",
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values: [points, this.id],
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});
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return result.greenpoints;
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}
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/**
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* The date the user joined the platform
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*/
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public async joinedAt(): Promise<Date> {
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this.loadDataIfNotExists();
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return new Date(this.$joinedAt);
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}
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/**
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* Returns all posts for a user.
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*/
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public async posts(): Promise<Post[]> {
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const result = await queryHelper.all({
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text: "SELECT * FROM posts WHERE author = $1",
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values: [this.id],
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});
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const posts = [];
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for (const row of result) {
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posts.push(new Post(row.id, row));
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}
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return posts;
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}
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/**
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* Fetches the data for the user.
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*/
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protected async loadData(): Promise<void> {
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let result: any;
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if (this.row) {
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result = this.row;
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} else {
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result = await queryHelper.first({
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text: "SELECT * FROM users WHERE user.id = $1",
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values: [this.id],
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});
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}
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if (result) {
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this.$name = result.name;
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this.$handle = result.handle;
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this.$email = result.email;
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this.$greenpoints = result.greenpoints;
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this.$joinedAt = result.joined_at;
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this.dataLoaded = true;
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}
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}
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}
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import {Runtime} from "inspector";
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import {Pool} from "pg";
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import globals from "./globals";
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import {QueryHelper} from "./QueryHelper";
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import globals from "../globals";
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import {QueryHelper} from "../QueryHelper";
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const config = globals.config;
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const tableCreationFile = __dirname + "/../sql/create-tables.sql";
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type Query {
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"returns the user object for a given user id"
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getUser(userId: ID): User
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"returns the post object for a post id"
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getPost(postId: ID): Post
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"returns the chat object for a chat id"
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getChat(chatId: ID): ChatRoom
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"returns the request object for a request id"
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getRequest(requestId: ID): Request
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"find a post by the posted date or content"
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findPost(first: Int, offset: Int, text: String!, postedDate: String): [Post]
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"find a user by user name or handle"
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findUser(first: Int, offset: Int, name: String!, handle: String!): [User]
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"returns the user object for a given user id"
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getUser(userId: ID): User
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"returns the post object for a post id"
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getPost(postId: ID): Post
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"returns the chat object for a chat id"
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getChat(chatId: ID): ChatRoom
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"returns the request object for a request id"
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getRequest(requestId: ID): Request
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"find a post by the posted date or content"
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findPost(first: Int, offset: Int, text: String!, postedDate: String): [Post]
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"find a user by user name or handle"
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findUser(first: Int, offset: Int, name: String!, handle: String!): [User]
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}
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type Mutation {
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"Upvote/downvote a Post"
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vote(postId: ID!, type: [VoteType!]!): Boolean
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"Report the post"
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report(postId: ID!): Boolean
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"Upvote/downvote a Post"
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vote(postId: ID!, type: [VoteType!]!): Boolean
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"Report the post"
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report(postId: ID!): Boolean
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"lets you accept a request for a given request id"
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acceptRequest(requestId: ID!): Boolean
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acceptRequest(requestId: ID!): Boolean
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"send a message in a Chatroom"
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sendMessage(chatId: ID!, content: String!): Boolean
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sendMessage(chatId: ID!, content: String!): Boolean
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# TODO: createPost, deletePost, sendRequest, denyRequest
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}
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"represents a single user account"
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type User {
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"url for the Profile picture of the User"
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profilePicture: String!
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"name of the User"
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name: String!
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"unique identifier name from the User"
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handle: String!
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"Id of the User"
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id: ID!
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"the total number of posts the user posted"
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numberOfPosts: Int
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"returns a given number of posts of a user"
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getAllPosts(first: Int=10, offset: Int): [Post]
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"creation date of the user account"
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joinedDate: String!
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"returns chats the user pinned"
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pinnedChats: [ChatRoom]
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"returns all friends of the user"
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friends: [User]
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"all request for groupChats/friends/events"
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requests: [Request]
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"url for the Profile picture of the User"
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profilePicture: String!
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"name of the User"
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name: String!
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"unique identifier name from the User"
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handle: String!
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"Id of the User"
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id: ID!
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"the total number of posts the user posted"
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numberOfPosts: Int
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"returns a given number of posts of a user"
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getAllPosts(first: Int=10, offset: Int): [Post]
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"creation date of the user account"
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joinedDate: String!
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"returns chats the user pinned"
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pinnedChats: [ChatRoom]
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"returns all friends of the user"
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friends: [User]
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"all request for groupChats/friends/events"
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requests: [Request]
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}
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"represents a single user post"
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type Post {
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"returns the path to the posts picture if it has one"
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picture: String
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"returns the text of the post"
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text: String
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"upvotes of the Post"
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upvotes: Int!
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"downvotes of the Post"
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downvotes: Int!
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"the user that is the author of the Post"
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author: User!
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"date the post was created"
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creationDate: String!
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"returns the type of vote the user performed on the post"
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alreadyVoted: VoteType
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"returns the tags of the post"
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tags: [String]
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"returns the path to the posts picture if it has one"
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picture: String
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"returns the text of the post"
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text: String
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"upvotes of the Post"
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upvotes: Int!
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"downvotes of the Post"
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downvotes: Int!
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"the user that is the author of the Post"
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author: User!
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"date the post was created"
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creationDate: String!
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"returns the type of vote the user performed on the post"
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userVote: VoteType
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"returns the tags of the post"
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tags: [String]
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}
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"represents a request of any type"
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type Request {
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"id of the request"
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id: ID!
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"type of the request"
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requestType: RequestType!
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"id of the request"
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id: ID!
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"type of the request"
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requestType: RequestType!
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}
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"represents a chatroom"
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type ChatRoom {
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"the members of the chatroom"
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members: [User!]
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"return a specfic range of messages posted in the chat"
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getMessages(first: Int, offset: Int): [String]
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"id of the chat"
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id: ID!
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"the members of the chatroom"
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members: [User!]
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"return a specfic range of messages posted in the chat"
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getMessages(first: Int, offset: Int): [String]
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"id of the chat"
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id: ID!
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}
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"represents the type of vote performed on a post"
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enum VoteType {
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UPVOTE
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DOWNVOTE
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UPVOTE
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DOWNVOTE
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}
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"represents the type of request that the user has received"
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enum RequestType {
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FRIENDREQUEST
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GROUPINVITE
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EVENTINVITE
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FRIENDREQUEST
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GROUPINVITE
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EVENTINVITE
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}
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Reference in New Issue