Basic post display
This commit is contained in:
250
src/lib/server/db.ts
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250
src/lib/server/db.ts
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@ -0,0 +1,250 @@
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import type { Account, Post, Tag } from '$lib/mastodon/response';
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import sqlite3 from 'sqlite3';
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const { MODE } = import.meta.env;
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const db: sqlite3.Database = new sqlite3.Database('moshingmammut.db');
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if (MODE === 'development') {
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sqlite3.verbose();
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db.on('change', (t, d, table, rowid) => {
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console.debug('DB change event', t, d, table, rowid);
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})
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db.on('trace', (sql) => {
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console.debug('Running', sql);
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});
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db.on('profile', (sql) => {
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console.debug('Finished', sql);
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});
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}
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interface Migration {
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id: number,
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name: string,
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statement: string
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}
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db.on('open', () => {
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console.log('Opened database');
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db.run('CREATE TABLE IF NOT EXISTS "migrations" ("id" integer,"name" TEXT, PRIMARY KEY (id))');
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db.serialize();
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db.all('SELECT id FROM migrations', (err, rows) => {
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if (err !== null) {
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console.error('Could not fetch existing migrations', err);
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return;
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}
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console.debug('Already applied migrations', rows);
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const appliedMigrations: Set<number> = new Set(rows.map((row: any) => row['id']));
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const toApply = getMigrations().filter(m => !appliedMigrations.has(m.id));
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for (let migration of toApply) {
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db.exec(migration.statement, (err) => {
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if (err !== null) {
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console.error(`Failed to apply migration ${migration.name}`, err);
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return;
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}
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db.run('INSERT INTO migrations (id, name) VALUES(?, ?)', [migration.id, migration.name], (e: Error) => {
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if (e !== null) {
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console.error(`Failed to mark migration ${migration.name} as applied`, e);
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return;
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}
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console.info(`Applied migration ${migration.name}`);
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});
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});
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}
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});
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});
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db.on('error', (err) => {
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console.error('Error opening database', err);
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});
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function getMigrations(): Migration[] {
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return [{
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id: 1,
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name: 'initial',
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statement: `
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CREATE TABLE accounts (
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id TEXT NOT NULL PRIMARY KEY,
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acct TEXT,
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username TEXT,
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display_name TEXT,
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url TEXT,
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avatar TEXT,
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avatar_static TEXT
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);
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CREATE TABLE tags (url TEXT NOT NULL PRIMARY KEY, tag TEXT NOT NULL);
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CREATE TABLE posts (
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id TEXT NOT NULL PRIMARY KEY,
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content TEXT,
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created_at TEXT,
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url TEXT NOT NULL,
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account_id TEXT NOT NULL,
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FOREIGN KEY (account_id) REFERENCES accounts(id)
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);
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CREATE TABLE poststags (
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id integer PRIMARY KEY,
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post_id TEXT NOT NULL,
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tag_url TEXT NOT NULL,
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FOREIGN KEY (post_id) REFERENCES posts(id),
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FOREIGN KEY (tag_url) REFERENCES tags(url)
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)`
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}];
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}
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export function savePost(post: Post): void {
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console.debug(`Saving post ${post.url}`);
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const account = post.account;
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db.run(`
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INSERT INTO accounts (id, acct, username, display_name, url, avatar, avatar_static)
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VALUES(?, ?, ?, ?, ?, ?, ?)
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ON CONFLICT(id)
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DO UPDATE SET
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acct=excluded.acct,
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username=excluded.username,
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display_name=excluded.display_name,
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url=excluded.url,
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avatar=excluded.avatar,
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avatar_static=excluded.avatar_static;`,
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[
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account.id,
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account.acct,
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account.username,
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account.display_name,
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account.url,
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account.avatar,
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account.avatar_static
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],
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(err) => {
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if (err !== null) {
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console.error(`Could not insert/update account ${account.id}`, err);
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return;
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}
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db.run(`
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INSERT INTO posts (id, content, created_at, url, account_id)
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VALUES (?, ?, ?, ?, ?) ON CONFLICT(id) DO UPDATE SET
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content=excluded.content,
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created_at=excluded.created_at,
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url=excluded.url,
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account_id=excluded.account_id;`,
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[
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post.id,
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post.content,
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post.created_at,
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post.url,
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post.account.id
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],
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(postErr) => {
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if (postErr !== null) {
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console.error(`Could not insert post ${post.url}`, postErr);
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return;
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}
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db.parallelize(() => {
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for (let tag of post.tags) {
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db.run(`
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INSERT INTO tags (url, tag) VALUES (?, ?)
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ON CONFLICT(url) DO UPDATE SET
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tag=excluded.tag;`,
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[
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tag.url,
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tag.name
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],
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(tagErr) => {
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if (tagErr !== null) {
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console.error(`Could not insert/update tag ${tag.url}`, tagErr);
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return;
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}
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db.run('INSERT INTO poststags (post_id, tag_url) VALUES (?, ?)',
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[post.id, tag.url],
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(posttagserr) => {
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if (posttagserr !== null) {
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console.error(`Could not insert poststags ${tag.url}, ${post.url}`, posttagserr);
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return;
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}
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}
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);
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}
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);
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}
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});
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});
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});
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}
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export async function getPosts(since: string | null, limit: number) {
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let promise = await new Promise<Post[]>((resolve, reject) => {
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let filter_query;
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let params: any = { $limit: limit };
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if (since === null) {
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filter_query = '';
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} else {
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filter_query = 'WHERE posts.created_at > $since';
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params.$since = since;
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console.debug('Filtering by created_at > ', since);
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}
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const sql = `SELECT posts.id, posts.content, posts.created_at, posts.url,
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accounts.id AS account_id, accounts.acct, accounts.username, accounts.display_name,
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accounts.url AS account_url, accounts.avatar
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FROM posts
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JOIN accounts ON posts.account_id = accounts.id
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${filter_query}
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ORDER BY created_at DESC
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LIMIT $limit`;
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db.all(
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sql,
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params,
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(err, rows: any[]) => {
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if (err != null) {
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console.error('Error loading posts', err);
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reject(err);
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return;
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}
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const postIdsParams = rows.map(() => '?').join(', ');
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db.all(
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`SELECT post_id, tags.url, tags.tag
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FROM poststags
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JOIN tags ON poststags.tag_url = tags.url
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WHERE post_id IN (${postIdsParams});`,
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rows.map((r: any) => r.id),
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(tagErr, tagRows: any[]) => {
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if (tagErr != null) {
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console.error('Error loading post tags', tagErr);
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reject(tagErr);
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return;
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}
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const tagMap: Map<string, Tag[]> = tagRows.reduce(
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(result: Map<string, Tag[]>, item) => {
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const tag: Tag = {
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url: item.url,
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name: item.tag
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};
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result.set(item.post_id, [...result.get(item.post_id) || [], tag]);
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return result;
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}, new Map());
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const posts = rows.map(row => {
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return {
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id: row.id,
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content: row.content,
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created_at: row.created_at,
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url: row.url,
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tags: tagMap.get(row.id) || [],
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account: {
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id: row.account_id,
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acct: row.acct,
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username: row.username,
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display_name: row.display_name,
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url: row.account_url,
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avatar: row.avatar,
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avatar_static: ''
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} as Account
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} as Post
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});
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resolve(posts);
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}
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);
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}
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);
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});
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return promise;
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}
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