forked from cory/tildefriends
279 lines
8.6 KiB
JavaScript
279 lines
8.6 KiB
JavaScript
import {LitElement, html, unsafeHTML, until} from './lit-all.min.js';
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import * as tfrpc from '/static/tfrpc.js';
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import {styles} from './tf-styles.js';
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class TfTabNewsFeedElement extends LitElement {
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static get properties() {
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return {
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whoami: {type: String},
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users: {type: Object},
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hash: {type: String},
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following: {type: Array},
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messages: {type: Array},
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drafts: {type: Object},
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expanded: {type: Object},
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channels_unread: {type: Object},
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loading: {type: Number},
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time_range: {type: Array},
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};
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}
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static styles = styles;
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constructor() {
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super();
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let self = this;
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this.whoami = null;
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this.users = {};
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this.hash = '#';
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this.following = [];
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this.drafts = {};
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this.expanded = {};
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this.channels_unread = {};
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this.start_time = (new Date()).valueOf();
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this.time_range = [0, 0];
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}
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channel() {
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return this.hash.startsWith('##') ? this.hash.substring(2) : '';
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}
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async fetch_messages(start_time, end_time) {
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if (this.hash.startsWith('#@')) {
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let r = await tfrpc.rpc.query(
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`
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WITH mine AS (SELECT rowid, id, previous, author, sequence, timestamp, hash, json(content) AS content, signature
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FROM messages
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WHERE messages.author = ?
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ORDER BY sequence DESC
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LIMIT 20)
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SELECT messages.rowid, messages.id, messages.previous, messages.author, messages.sequence, messages.timestamp, messages.hash, json(messages.content) AS content, messages.signature
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FROM mine
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JOIN messages_refs ON mine.id = messages_refs.ref
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JOIN messages ON messages_refs.message = messages.id
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UNION
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SELECT * FROM mine
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`,
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[this.hash.substring(1)]
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);
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return r;
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} else if (this.hash.startsWith('#%')) {
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return await tfrpc.rpc.query(
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`
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SELECT id, previous, author, sequence, timestamp, hash, json(content) AS content, signature
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FROM messages
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WHERE id = ?1
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UNION
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SELECT id, previous, author, sequence, timestamp, hash, json(content) AS content, signature
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FROM messages JOIN messages_refs
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ON messages.id = messages_refs.message
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WHERE messages_refs.ref = ?1
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`,
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[this.hash.substring(1)]
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);
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} else if (this.hash.startsWith('##')) {
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let promises = [];
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const k_following_limit = 256;
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for (let i = 0; i < this.following.length; i += k_following_limit) {
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promises.push(
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tfrpc.rpc.query(
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`
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WITH news AS (SELECT messages.rowid, messages.id, messages.previous, messages.author, messages.sequence, messages.timestamp, messages.hash, json(messages.content) AS content, messages.signature
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FROM messages
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JOIN json_each(?) AS following ON messages.author = following.value
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WHERE
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messages.timestamp > ? AND
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messages.timestamp < ? AND
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messages.content ->> 'channel' = ?
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ORDER BY messages.timestamp DESC)
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SELECT messages.rowid, messages.id, messages.previous, messages.author, messages.sequence, messages.timestamp, messages.hash, json(messages.content) AS content, messages.signature
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FROM news
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JOIN messages_refs ON news.id = messages_refs.ref
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JOIN messages ON messages_refs.message = messages.id
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UNION
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SELECT messages.rowid, messages.id, messages.previous, messages.author, messages.sequence, messages.timestamp, messages.hash, json(messages.content) AS content, messages.signature
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FROM news
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JOIN messages_refs ON news.id = messages_refs.message
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JOIN messages ON messages_refs.ref = messages.id
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UNION
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SELECT news.* FROM news
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`,
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[
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JSON.stringify(this.following.slice(i, i + k_following_limit)),
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start_time,
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end_time,
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this.hash.substring(2),
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]
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)
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);
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}
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return [].concat(...(await Promise.all(promises)));
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} else {
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let promises = [];
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const k_following_limit = 256;
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for (let i = 0; i < this.following.length; i += k_following_limit) {
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promises.push(
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tfrpc.rpc.query(
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`
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WITH news AS (SELECT messages.rowid, messages.id, messages.previous, messages.author, messages.sequence, messages.timestamp, messages.hash, json(messages.content) AS content, messages.signature
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FROM messages
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JOIN json_each(?) AS following ON messages.author = following.value
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WHERE messages.timestamp > ? AND messages.timestamp < ?
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ORDER BY messages.timestamp DESC)
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SELECT messages.rowid, messages.id, messages.previous, messages.author, messages.sequence, messages.timestamp, messages.hash, json(messages.content) AS content, messages.signature
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FROM news
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JOIN messages_refs ON news.id = messages_refs.ref
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JOIN messages ON messages_refs.message = messages.id
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UNION
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SELECT messages.rowid, messages.id, messages.previous, messages.author, messages.sequence, messages.timestamp, messages.hash, json(messages.content) AS content, messages.signature
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FROM news
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JOIN messages_refs ON news.id = messages_refs.message
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JOIN messages ON messages_refs.ref = messages.id
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UNION
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SELECT news.* FROM news
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`,
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[
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JSON.stringify(this.following.slice(i, i + k_following_limit)),
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start_time,
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end_time,
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]
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)
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);
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}
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return [].concat(...(await Promise.all(promises)));
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}
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}
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async load_more() {
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this.loading++;
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try {
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let more = [];
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while (!more.length) {
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let last_start_time = this.start_time;
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this.start_time = last_start_time - 7 * 24 * 60 * 60 * 1000;
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more = await this.fetch_messages(this.start_time, last_start_time);
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this.time_range = [this.start_time, this.time_range[1]];
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}
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this.messages = await this.decrypt([...more, ...this.messages]);
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} finally {
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this.loading--;
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}
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}
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async decrypt(messages) {
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console.log('decrypt');
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let result = [];
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for (let message of messages) {
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let content;
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try {
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content = JSON.parse(message?.content);
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} catch {}
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if (typeof content === 'string') {
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let decrypted;
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try {
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decrypted = await tfrpc.rpc.try_decrypt(this.whoami, content);
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} catch {}
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if (decrypted) {
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try {
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message.decrypted = JSON.parse(decrypted);
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} catch {
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message.decrypted = decrypted;
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}
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}
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}
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result.push(message);
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}
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return result;
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}
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async add_messages(messages) {
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this.messages = await this.decrypt([...messages, ...this.messages]);
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}
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async load_messages() {
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let self = this;
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this.loading = true;
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let messages = [];
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try {
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this.messages = [];
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this._messages_hash = this.hash;
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this._messages_following = this.following;
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let now = new Date().valueOf();
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let start_time = now - 24 * 60 * 60 * 1000;
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this.start_time = start_time;
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this.time_range = [this.start_time, now + 24 * 60 * 60 * 1000];
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messages = await this.fetch_messages(this.time_range[0], this.time_range[1]);
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messages = await this.decrypt(messages);
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if (!messages.length) {
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let more = [];
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while (!more.length && start_time >= 0) {
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let last_start_time = start_time;
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start_time = last_start_time - 7 * 24 * 60 * 60 * 1000;
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more = await this.fetch_messages(start_time, last_start_time);
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}
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this.time_range = [start_time, this.time_range[1]];
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messages = await this.decrypt([...more, ...this.messages]);
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}
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} finally {
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this.loading = false;
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}
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this.messages = messages;
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console.log(`loading messages done for ${self.whoami}`);
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}
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mark_all_read() {
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let newest = this.messages.reduce((accumulator, current) => Math.max(accumulator, current.rowid), -1);
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if (newest >= 0) {
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this.dispatchEvent(new CustomEvent('channelsetunread', {
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bubbles: true,
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composed: true,
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detail: {
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channel: this.channel(),
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unread: newest + 1,
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},
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}));
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}
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}
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render() {
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if (
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!this.messages ||
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this._messages_hash !== this.hash ||
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this._messages_following !== this.following
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) {
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console.log(
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`loading messages for ${this.whoami} (following ${this.following.length})`
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);
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this.load_messages();
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}
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let more;
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if (!this.hash.startsWith('#@') && !this.hash.startsWith('#%')) {
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more = html`
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<p>
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<button class="w3-button w3-theme-d1" @click=${this.mark_all_read}>Mark All Read</button>
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<button ?disabled=${this.loading} class="w3-button w3-theme-d1" @click=${this.load_more}>
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Load More
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</button>
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<span>Showing ${new Date(this.time_range[0]).toLocaleDateString()} - ${new Date(this.time_range[1]).toLocaleDateString()}.</span>
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</p>
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`;
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}
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return html`
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<tf-news
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id="news"
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whoami=${this.whoami}
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.users=${this.users}
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.messages=${this.messages}
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.following=${this.following}
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.drafts=${this.drafts}
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.expanded=${this.expanded}
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channel=${this.channel()}
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channel_unread=${this.channels_unread?.[this.channel()]}
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></tf-news>
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${more}
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`;
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}
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}
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customElements.define('tf-tab-news-feed', TfTabNewsFeedElement);
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