Oh yeah, I was playing with the follow app.
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4368 ed5197a5-7fde-0310-b194-c3ffbd925b24
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1102feaac3
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@ -1,73 +1,163 @@
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var g_following_cache = {};
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var g_following_deep_cache = {};
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var g_about_cache = {};
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let g_about_cache = {};
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async function following(db, id) {
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if (g_following_cache[id]) {
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return g_following_cache[id];
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}
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var o = await db.get(id + ":following");
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const k_version = 5;
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var f = o ? JSON.parse(o) : o;
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if (!f || f.version != k_version) {
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f = {users: [], sequence: 0, version: k_version};
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}
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f.users = new Set(f.users);
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await ssb.sqlAsync(
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"SELECT "+
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" sequence, "+
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" json_extract(content, '$.contact') AS contact, "+
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" json_extract(content, '$.following') AS following "+
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"FROM messages "+
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"WHERE "+
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" author = ?1 AND "+
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" sequence > ?2 AND "+
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" json_extract(content, '$.type') = 'contact' "+
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"UNION SELECT MAX(sequence) AS sequence, NULL, NULL FROM messages WHERE author = ?1 "+
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"ORDER BY sequence",
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[id, f.sequence],
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function(row) {
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if (row.following) {
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f.users.add(row.contact);
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} else {
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f.users.delete(row.contact);
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}
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f.sequence = row.sequence;
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});
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var as_set = f.users;
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f.users = Array.from(f.users).sort();
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var j = JSON.stringify(f);
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if (o != j) {
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await db.set(id + ":following", j);
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}
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f.users = as_set;
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g_following_cache[id] = f.users;
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return f.users;
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async function query(sql, args) {
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let result = [];
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await ssb.sqlAsync(sql, args, function(row) {
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result.push(row);
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});
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return result;
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}
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async function followingDeep(db, seed_ids, depth) {
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if (depth <= 0) {
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return seed_ids;
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async function contacts_internal(id, last_row_id, following, max_row_id) {
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let result = Object.assign({}, following[id] || {});
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result.following = result.following || {};
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result.blocking = result.blocking || {};
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let contacts = await query(
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`
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SELECT content FROM messages
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WHERE author = ? AND
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rowid > ? AND
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rowid <= ? AND
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json_extract(content, '$.type') = 'contact'
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ORDER BY sequence
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`,
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[id, last_row_id, max_row_id]);
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for (let row of contacts) {
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let contact = JSON.parse(row.content);
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if (contact.following === true) {
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result.following[contact.contact] = true;
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} else if (contact.following === false) {
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delete result.following[contact.contact];
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} else if (contact.blocking === true) {
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result.blocking[contact.contact] = true;
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} else if (contact.blocking === false) {
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delete result.blocking[contact.contact];
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}
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}
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var key = JSON.stringify([seed_ids, depth]);
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if (g_following_deep_cache[key]) {
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return g_following_deep_cache[key];
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following[id] = result;
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return result;
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}
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async function contact(id, last_row_id, following, max_row_id) {
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return await contacts_internal(id, last_row_id, following, max_row_id);
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}
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async function following_deep_internal(ids, depth, blocking, last_row_id, following, max_row_id) {
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let contacts = await Promise.all([...new Set(ids)].map(x => contact(x, last_row_id, following, max_row_id)));
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let result = {};
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for (let i = 0; i < ids.length; i++) {
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let id = ids[i];
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let contact = contacts[i];
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let all_blocking = Object.assign({}, contact.blocking, blocking);
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let found = Object.keys(contact.following).filter(y => !all_blocking[y]);
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let deeper = depth > 1 ? await following_deep_internal(found, depth - 1, all_blocking, last_row_id, following, max_row_id) : [];
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result[id] = [id, ...found, ...deeper];
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}
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var f = await Promise.all(seed_ids.map(x => following(db, x).then(x => [...x])));
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var ids = [].concat(...f);
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var x = await followingDeep(db, [...new Set(ids)].sort(), depth - 1);
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x = [...new Set([].concat(...x, ...seed_ids))].sort();
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g_following_deep_cache[key] = x;
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return x;
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return [...new Set(Object.values(result).flat())];
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}
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async function following_deep(ids, depth, blocking) {
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let db = await database('cache');
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const k_cache_version = 5;
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let cache = await db.get('following');
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cache = cache ? JSON.parse(cache) : {};
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if (cache.version !== k_cache_version) {
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cache = {
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version: k_cache_version,
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following: {},
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last_row_id: 0,
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};
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}
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let max_row_id = (await query(`
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SELECT MAX(rowid) AS max_row_id FROM messages
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`, []))[0].max_row_id;
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let result = await following_deep_internal(ids, depth, blocking, cache.last_row_id, cache.following, max_row_id);
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cache.last_row_id = max_row_id;
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let store = JSON.stringify(cache);
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await db.set('following', store);
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return result;
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}
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async function fetch_about(db, ids, users) {
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const k_cache_version = 1;
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let cache = await db.get('about');
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cache = cache ? JSON.parse(cache) : {};
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if (cache.version !== k_cache_version) {
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cache = {
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version: k_cache_version,
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about: {},
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last_row_id: 0,
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};
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}
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let max_row_id = 0;
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await ssb.sqlAsync(`
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SELECT MAX(rowid) AS max_row_id FROM messages
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`,
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[],
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function(row) {
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max_row_id = row.max_row_id;
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});
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for (let id of Object.keys(cache.about)) {
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if (ids.indexOf(id) == -1) {
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delete cache.about[id];
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}
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}
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let abouts = [];
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await ssb.sqlAsync(
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`
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SELECT
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messages.*
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FROM
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messages,
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json_each(?1) AS following
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WHERE
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messages.author = following.value AND
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messages.rowid > ?3 AND
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messages.rowid <= ?4 AND
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json_extract(messages.content, '$.type') = 'about'
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UNION
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SELECT
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messages.*
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FROM
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messages,
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json_each(?2) AS following
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WHERE
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messages.author = following.value AND
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messages.rowid <= ?4 AND
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json_extract(messages.content, '$.type') = 'about'
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ORDER BY messages.author, messages.sequence
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`,
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[
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JSON.stringify(ids.filter(id => cache.about[id])),
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JSON.stringify(ids.filter(id => !cache.about[id])),
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cache.last_row_id,
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max_row_id,
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]);
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for (let about of abouts) {
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let content = JSON.parse(about.content);
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if (content.about === about.author) {
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delete content.type;
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delete content.about;
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cache.about[about.author] = Object.assign(cache.about[about.author] || {}, content);
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}
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}
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cache.last_row_id = max_row_id;
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await db.set('about', JSON.stringify(cache));
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users = users || {};
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for (let id of Object.keys(cache.about)) {
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users[id] = Object.assign(users[id] || {}, cache.about[id]);
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}
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return Object.assign({}, users);
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}
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async function getAbout(db, id) {
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if (g_about_cache[id]) {
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return g_about_cache[id];
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}
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var o = await db.get(id + ":about");
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let o = await db.get(id + ":about");
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const k_version = 4;
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var f = o ? JSON.parse(o) : o;
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let f = o ? JSON.parse(o) : o;
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if (!f || f.version != k_version) {
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f = {about: {}, sequence: 0, version: k_version};
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}
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@ -87,7 +177,7 @@ async function getAbout(db, id) {
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function(row) {
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f.sequence = row.sequence;
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if (row.content) {
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var about = {};
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let about = {};
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try {
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about = JSON.parse(row.content);
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} catch {
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@ -97,7 +187,7 @@ async function getAbout(db, id) {
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f.about = Object.assign(f.about, about);
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}
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});
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var j = JSON.stringify(f);
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let j = JSON.stringify(f);
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if (o != j) {
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await db.set(id + ":about", j);
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}
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@ -108,7 +198,7 @@ async function getAbout(db, id) {
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async function getSize(db, id) {
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let size = 0;
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await ssb.sqlAsync(
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"SELECT (SUM(LENGTH(content)) + SUM(LENGTH(author)) + SUM(LENGTH(id))) AS size FROM messages WHERE author = ?1",
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"SELECT (LENGTH(author) * COUNT(*) + SUM(LENGTH(content)) + SUM(LENGTH(id))) AS size FROM messages WHERE author = ?1",
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[id],
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function (row) {
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size += row.size;
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@ -116,6 +206,25 @@ async function getSize(db, id) {
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return size;
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}
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async function getSizes(ids) {
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let sizes = {};
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await ssb.sqlAsync(
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`
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SELECT
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author,
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(SUM(LENGTH(content)) + SUM(LENGTH(author)) + SUM(LENGTH(messages.id))) AS size
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FROM messages
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JOIN json_each(?) AS ids ON author = ids.value
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GROUP BY author
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`,
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[JSON.stringify(ids)],
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function (row) {
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sizes[row.author] = row.size;
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});
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return sizes;
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}
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function niceSize(bytes) {
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let value = bytes;
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let unit = 'B';
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@ -131,27 +240,28 @@ function niceSize(bytes) {
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return Math.round(value * 10) / 10 + ' ' + unit;
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}
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async function buildTree(db, root, indent, depth) {
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var f = await following(db, root);
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var result = indent + '[' + f.size + '] ' + '<a target="_top" href="../index/#' + root + '">' + ((await getAbout(db, root)).name || root) + '</a> ' + niceSize(await getSize(db, root)) + '\n';
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if (depth > 0) {
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for (let next of f) {
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result += await buildTree(db, next, indent + ' ', depth - 1);
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}
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}
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return result;
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function escape(value) {
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return value.replaceAll('&', '&').replaceAll('<', '<').replaceAll('>', '>');
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}
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async function main() {
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await app.setDocument('<pre style="color: #fff">building...</pre>');
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var db = await database('ssb');
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var whoami = await ssb.getIdentities();
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var tree = '';
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for (let id of whoami) {
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await app.setDocument(`<pre style="color: #fff">building... ${id}</pre>`);
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tree += await buildTree(db, id, '', 2);
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let db = await database('ssb');
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let whoami = await ssb.getIdentities();
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let tree = '';
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await app.setDocument(`<pre style="color: #fff">Enumerating followed users...</pre>`);
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let following = await following_deep(whoami, 2, {});
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await app.setDocument(`<pre style="color: #fff">Getting names and sizes...</pre>`);
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let [about, sizes] = await Promise.all([
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fetch_about(db, following, {}),
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getSizes(following),
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]);
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await app.setDocument(`<pre style="color: #fff">Finishing...</pre>`);
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following.sort((a, b) => ((sizes[b] ?? 0) - (sizes[a] ?? 0)));
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for (let id of following) {
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tree += `<li><a href="/~core/ssb/#${id}">${escape(about[id]?.name ?? id)}</a> ${niceSize(sizes[id] ?? 0)}</li>\n`;
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}
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await app.setDocument('<pre style="color: #fff">FOLLOWING:\n' + tree + '</pre>');
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await app.setDocument('<!DOCTYPE html>\n<html>\n<body style="color: #fff"><h1>Following</h1>\n<ul>' + tree + '</ul>\n</body>\n</html>');
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}
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main();
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