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* Services for the post table.
* @packageDocumentation
*/
import { BaseService, getTime, newUniqueID } from "./util";
import { Image } from "./image";
import { Rating, RatingParams } from "./rating";
import { User } from "./user";
/**
* Post architecture.
*/
export interface Post {
id: string;
userID: string;
content: string;
location: string;
city: string;
country: string;
locationTypeID: number;
programID: number;
ratingID: string;
threeWords: string;
currentUserStatusID: number;
address: string | null;
phone: string | null;
website: string | null;
approved: boolean;
createTime: number;
editTime: number | null;
}
/**
* Post with only ID architecture.
*/
interface PostID {
id: string;
}
/**
* Post with only user ID architecture.
*/
interface PostUserID {
userID: string;
}
/**
* Post with only rating ID architecture.
*/
interface PostRatingID {
ratingID: string;
}
/**
* Post with only content architecture.
*/
interface PostContent {
content: string;
}
/**
* Post with only approved architecture.
*/
interface PostApproved {
approved: boolean;
}
/**
* Post with only ID and rating ID architecture.
*/
interface PostIDRatingID {
id: string;
ratingID: string;
}
/**
* Unapproved post architecture.
*/
export interface UnapprovedPost {
postID: string;
firstname: string;
lastname: string;
content: string;
location: string;
city: string;
country: string;
locationType: string;
program: string;
threeWords: string;
createTime: number;
}
/**
* User post architecture.
*/
export interface UserPost extends Post {
program: string;
}
/**
* Post details architecture.
*/
interface PostDetails {
content?: string;
location?: string;
city?: string;
country?: string;
locationTypeID?: number;
programID?: number;
threeWords?: string;
address?: string;
phone?: string;
website?: string;
}
/**
* Post services.
*/
export class PostService extends BaseService {
/**
* Create a post.
*
* @param userID The ID of the user making the post.
* @param content The text content of the post.
* @param imageData The binary data of the images associated with the post.
* @param location The post's location.
* @param city The location's city.
* @param country The location's country.
* @param locationTypeID The type ID of location.
* @param programID The ID of the program the user is in.
* @param rating The user's rating of the location.
* @param threeWords Three words to describe the location.
* @param address The location's address.
* @param phone The location's phone number.
* @param website The location's website.
* @returns The new post's ID.
*/
public async createPost(
userID: string,
content: string,
imageData: Buffer[],
location: string,
city: string,
country: string,
locationTypeID: number,
programID: number,
rating: RatingParams,
threeWords: string,
address: string = null,
phone: string = null,
website: string = null
): Promise<string> {
const postID = await newUniqueID(this.dbm, "Post");
const ratingID = await this.dbm.ratingService.createRating(rating);
const user = await this.dbm.userService.getUser(userID);
const sql = `
INSERT INTO Post (
id, userID, content, location, city, country, locationTypeID,
programID, ratingID, threeWords, currentUserStatusID, address, phone,
website, createTime
) VALUES (
?, ?, ?, ?, ?, ?, ?,
?, ?, ?, ?, ?, ?,
?, ?
);
`;
const params = [
postID,
userID,
content,
location,
city,
country,
locationTypeID,
programID,
ratingID,
threeWords,
user.statusID,
address,
phone,
website,
getTime(),
];
await this.dbm.execute(sql, params);
await this.dbm.postImageService.createPostImages(postID, imageData);
await this.dbm.userService.updateLastPostTime(userID);
return postID;
}
/**
* Check if a post exists.
*
* @param postID A post's ID.
* @returns Whether or not the post exists.
*/
public async postExists(postID: string): Promise<boolean> {
const sql = `SELECT id FROM Post WHERE id = ?;`;
const params = [postID];
const rows: PostID[] = await this.dbm.execute(sql, params);
return rows.length > 0;
}
/**
* Get a post.
*
* @param postID A post's ID.
* @returns The post.
*/
public async getPost(postID: string): Promise<Post> {
const sql = `SELECT * FROM Post WHERE id = ?;`;
const params = [postID];
const rows: Post[] = await this.dbm.execute(sql, params);
return rows[0];
}
/**
* Delete a post.
*
* @param postID A post's ID.
*/
public async deletePost(postID: string): Promise<void> {
let sql = `SELECT ratingID FROM Post WHERE id = ?;`;
let params = [postID];
let rows: PostRatingID[] = await this.dbm.execute(sql, params);
await this.dbm.postImageService.deletePostImages(postID);
await this.dbm.adminFavoritesService.unfavorite(postID);
await this.dbm.postVoteService.deletePostVotes(postID);
sql = `DELETE FROM Post WHERE id = ?;`;
params = [postID];
await this.dbm.execute(sql, params);
const ratingID = rows[0]?.ratingID;
await this.dbm.ratingService.deleteRating(ratingID);
}
/**
* Edit a post, given the parts of the post that have been edited.
*
* @param postID A post's ID.
* @param postDetails The post details.
*/
public async editPost(
postID: string,
postDetails: PostDetails
): Promise<void> {
const newFields = Object.keys(postDetails)
.filter((field) => field !== undefined && field !== null)
.map((field) => `${field} = ?`);
const newValues = Object.keys(postDetails)
.filter((field) => field !== undefined && field !== null)
.map((field) => postDetails[field]);
const sql = `UPDATE Post SET ${newFields.join(
", "
)}, editTime = ? WHERE id = ?;`;
const params = [...newValues, getTime(), postID];
await this.dbm.execute(sql, params);
}
/**
* Get the user who made the post.
*
* @param postID A post's ID.
* @returns The user who made the post.
*/
public async getPostUser(postID: string): Promise<User> {
const sql = `SELECT userID FROM Post WHERE id = ?;`;
const params = [postID];
const rows: PostUserID[] = await this.dbm.execute(sql, params);
const userID = rows[0]?.userID;
const user = await this.dbm.userService.getUser(userID);
return user;
}
/**
* Get a post's rating.
*
* @param postID A post's ID.
* @returns The post's rating.
*/
public async getPostRating(postID: string): Promise<Rating> {
const sql = `SELECT ratingID FROM Post WHERE id = ?;`;
const params = [postID];
const rows: PostRatingID[] = await this.dbm.execute(sql, params);
const ratingID = rows[0]?.ratingID;
const rating = await this.dbm.ratingService.getRating(ratingID);
return rating;
}
/**
* Get all of a user's posts.
*
* @param userID A user's ID.
* @returns A list of all posts made by the user.
*/
public async getUserPosts(userID: string): Promise<UserPost[]> {
const sql = `
SELECT Post.*, Program.name AS program
FROM Post
JOIN Program ON Post.programID = Program.id
WHERE Post.userID = ?
ORDER BY Post.createTime;
`;
const params = [userID];
const rows: UserPost[] = await this.dbm.execute(sql, params);
return rows;
}
/**
* Delete all of a user's posts.
*
* @param userID A user's ID.
*/
public async deleteUserPosts(userID: string): Promise<void> {
let sql = `SELECT id, ratingID FROM Post WHERE userID = ?;`;
let params = [userID];
const rows: PostIDRatingID[] = await this.dbm.execute(sql, params);
const postIDs = rows.map((post) => post.id);
for (const postID of postIDs) {
await this.dbm.postImageService.deletePostImages(postID);
}
sql = `DELETE FROM Post WHERE userID = ?;`;
params = [userID];
await this.dbm.execute(sql, params);
const ratingIDs = rows.map((post) => `'${post.ratingID}'`);
if (ratingIDs.length > 0) {
sql = `DELETE FROM Rating WHERE id IN (${ratingIDs.join(", ")});`;
params = [];
await this.dbm.execute(sql, params);
}
}
/**
* Get a post's text content.
*
* @param postID A post's ID.
* @returns The post's text content.
*/
public async getPostContent(postID: string): Promise<string> {
const sql = `SELECT content FROM Post WHERE id = ?;`;
const params = [postID];
const rows: PostContent[] = await this.dbm.execute(sql, params);
return rows[0]?.content;
}
/**
* Set a post's text content.
*
* @param postID A post's ID.
* @param content The new text content of a post.
*/
public async setPostContent(postID: string, content: string): Promise<void> {
const sql = `UPDATE Post SET content = ? WHERE id = ?;`;
const params = [content, postID];
await this.dbm.execute(sql, params);
}
/**
* Get a post's images.
*
* @param postID A post's ID.
* @returns The images associated with the post.
*/
public async getPostImages(postID: string): Promise<Image[]> {
return await this.dbm.postImageService.getPostImages(postID);
}
/**
* Set a post's images.
*
* @param postID A post's ID.
* @param imageData The binary data of the new images.
* @returns The IDs of the new images.
*/
public async setPostImages(
postID: string,
imageData: Buffer[]
): Promise<string[]> {
return await this.dbm.postImageService.createPostImages(postID, imageData);
}
/**
* Check if a post has been approved.
*
* @param postID A post's ID.
* @returns Whether or not the post has been approved by an admin.
*/
public async isApproved(postID: string): Promise<boolean> {
const sql = `SELECT approved FROM Post WHERE id = ?;`;
const params = [postID];
const rows: PostApproved[] = await this.dbm.execute(sql, params);
return !!rows[0]?.approved;
}
/**
* Set a post's approved status.
*
* @param postID A post's ID.
* @param approved Approved status.
*/
public async setApproved(
postID: string,
approved: boolean = true
): Promise<void> {
const sql = `UPDATE Post SET approved = ? WHERE id = ?;`;
const params = [approved, postID];
await this.dbm.execute(sql, params);
}
/**
* Get all unapproved posts.
*
* @returns All unapproved posts.
*/
public async getUnapproved(): Promise<UnapprovedPost[]> {
const sql = `
SELECT
Post.id AS postID, User.firstname AS firstname,
User.lastname AS lastname, content, location, city, country,
LocationType.name AS locationType, Program.name AS program,
threeWords, createTime
FROM Post
JOIN User
ON Post.userID = User.id
JOIN LocationType
ON Post.locationTypeID = LocationType.id
JOIN Program
ON Post.programID = Program.id
WHERE Post.approved = FALSE
ORDER BY createTime;
`;
const rows: UnapprovedPost[] = await this.dbm.execute(sql);
return rows;
}
}
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