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flags.js
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flags.js
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'use strict';
const _ = require('lodash');
const winston = require('winston');
const validator = require('validator');
const db = require('./database');
const user = require('./user');
const groups = require('./groups');
const meta = require('./meta');
const notifications = require('./notifications');
const analytics = require('./analytics');
const categories = require('./categories');
const topics = require('./topics');
const posts = require('./posts');
const privileges = require('./privileges');
const plugins = require('./plugins');
const utils = require('../public/src/utils');
const Flags = module.exports;
Flags._constants = {
states: ['open', 'wip', 'resolved', 'rejected'],
state_class: {
open: 'info',
wip: 'warning',
resolved: 'success',
rejected: 'danger',
},
};
Flags.init = async function () {
// Query plugins for custom filter strategies and merge into core filter strategies
function prepareSets(sets, orSets, prefix, value) {
if (!Array.isArray(value)) {
sets.push(prefix + value);
} else if (value.length) {
value.forEach(x => orSets.push(prefix + x));
}
}
const hookData = {
filters: {
type: function (sets, orSets, key) {
prepareSets(sets, orSets, 'flags:byType:', key);
},
state: function (sets, orSets, key) {
prepareSets(sets, orSets, 'flags:byState:', key);
},
reporterId: function (sets, orSets, key) {
prepareSets(sets, orSets, 'flags:byReporter:', key);
},
assignee: function (sets, orSets, key) {
prepareSets(sets, orSets, 'flags:byAssignee:', key);
},
targetUid: function (sets, orSets, key) {
prepareSets(sets, orSets, 'flags:byTargetUid:', key);
},
cid: function (sets, orSets, key) {
prepareSets(sets, orSets, 'flags:byCid:', key);
},
page: function () { /* noop */ },
perPage: function () { /* noop */ },
quick: function (sets, orSets, key, uid) {
switch (key) {
case 'mine':
sets.push('flags:byAssignee:' + uid);
break;
}
},
},
helpers: {
prepareSets: prepareSets,
},
};
try {
const data = await plugins.fireHook('filter:flags.getFilters', hookData);
Flags._filters = data.filters;
} catch (err) {
winston.error('[flags/init] Could not retrieve filters', err.stack);
Flags._filters = {};
}
};
Flags.get = async function (flagId) {
const [base, history, notes] = await Promise.all([
db.getObject('flag:' + flagId),
Flags.getHistory(flagId),
Flags.getNotes(flagId),
]);
if (!base) {
return;
}
const [userObj, targetObj] = await Promise.all([
user.getUserFields(base.uid, ['username', 'userslug', 'picture', 'reputation']),
Flags.getTarget(base.type, base.targetId, 0),
]);
const flagObj = {
state: 'open',
assignee: null,
...base,
description: validator.escape(base.description),
datetimeISO: utils.toISOString(base.datetime),
target_readable: base.type.charAt(0).toUpperCase() + base.type.slice(1) + ' ' + base.targetId,
target: targetObj,
history: history,
notes: notes,
reporter: userObj,
};
const data = await plugins.fireHook('filter:flags.get', {
flag: flagObj,
});
return data.flag;
};
Flags.list = async function (filters, uid) {
filters = filters || {};
let sets = [];
const orSets = [];
// Default filter
filters.page = filters.hasOwnProperty('page') ? Math.abs(parseInt(filters.page, 10) || 1) : 1;
filters.perPage = filters.hasOwnProperty('perPage') ? Math.abs(parseInt(filters.perPage, 10) || 20) : 20;
for (var type in filters) {
if (filters.hasOwnProperty(type)) {
if (Flags._filters.hasOwnProperty(type)) {
Flags._filters[type](sets, orSets, filters[type], uid);
} else {
winston.warn('[flags/list] No flag filter type found: ' + type);
}
}
}
sets = (sets.length || orSets.length) ? sets : ['flags:datetime']; // No filter default
let flagIds = [];
if (sets.length === 1) {
flagIds = await db.getSortedSetRevRange(sets[0], 0, -1);
} else if (sets.length > 1) {
flagIds = await db.getSortedSetRevIntersect({ sets: sets, start: 0, stop: -1, aggregate: 'MAX' });
}
if (orSets.length) {
const _flagIds = await db.getSortedSetRevUnion({ sets: orSets, start: 0, stop: -1, aggregate: 'MAX' });
if (sets.length) {
// If flag ids are already present, return a subset of flags that are in both sets
flagIds = _.intersection(flagIds, _flagIds);
} else {
// Otherwise, return all flags returned via orSets
flagIds = _.union(flagIds, _flagIds);
}
}
// Create subset for parsing based on page number (n=20)
const flagsPerPage = Math.abs(parseInt(filters.perPage, 10) || 1);
const pageCount = Math.ceil(flagIds.length / flagsPerPage);
flagIds = flagIds.slice((filters.page - 1) * flagsPerPage, filters.page * flagsPerPage);
const flags = await Promise.all(flagIds.map(async (flagId) => {
let flagObj = await db.getObject('flag:' + flagId);
const userObj = await user.getUserFields(flagObj.uid, ['username', 'picture']);
flagObj = {
state: 'open',
assignee: null,
...flagObj,
reporter: {
username: userObj.username,
picture: userObj.picture,
'icon:bgColor': userObj['icon:bgColor'],
'icon:text': userObj['icon:text'],
},
};
flagObj.labelClass = Flags._constants.state_class[flagObj.state];
return Object.assign(flagObj, {
description: validator.escape(String(flagObj.description)),
target_readable: flagObj.type.charAt(0).toUpperCase() + flagObj.type.slice(1) + ' ' + flagObj.targetId,
datetimeISO: utils.toISOString(flagObj.datetime),
});
}));
const data = await plugins.fireHook('filter:flags.list', {
flags: flags,
page: filters.page,
});
return {
flags: data.flags,
page: data.page,
pageCount: pageCount,
};
};
Flags.validate = async function (payload) {
const [target, reporter] = await Promise.all([
Flags.getTarget(payload.type, payload.id, payload.uid),
user.getUserData(payload.uid),
]);
if (!target) {
throw new Error('[[error:invalid-data]]');
} else if (target.deleted) {
throw new Error('[[error:post-deleted]]');
} else if (!reporter || !reporter.userslug) {
throw new Error('[[error:no-user]]');
} else if (reporter.banned) {
throw new Error('[[error:user-banned]]');
}
if (payload.type === 'post') {
const editable = await privileges.posts.canEdit(payload.id, payload.uid);
if (!editable.flag && !meta.config['reputation:disabled'] && reporter.reputation < meta.config['min:rep:flag']) {
throw new Error('[[error:not-enough-reputation-to-flag]]');
}
} else if (payload.type === 'user') {
const editable = await privileges.users.canEdit(payload.uid, payload.id);
if (!editable && !meta.config['reputation:disabled'] && reporter.reputation < meta.config['min:rep:flag']) {
throw new Error('[[error:not-enough-reputation-to-flag]]');
}
} else {
throw new Error('[[error:invalid-data]]');
}
};
Flags.getNotes = async function (flagId) {
let notes = await db.getSortedSetRevRangeWithScores('flag:' + flagId + ':notes', 0, -1);
notes = await modifyNotes(notes);
return notes;
};
Flags.getNote = async function (flagId, datetime) {
let notes = await db.getSortedSetRangeByScoreWithScores('flag:' + flagId + ':notes', 0, 1, datetime, datetime);
if (!notes.length) {
throw new Error('[[error:invalid-data]]');
}
notes = await modifyNotes(notes);
return notes[0];
};
async function modifyNotes(notes) {
const uids = [];
notes = notes.map(function (note) {
const noteObj = JSON.parse(note.value);
uids.push(noteObj[0]);
return {
uid: noteObj[0],
content: noteObj[1],
datetime: note.score,
datetimeISO: utils.toISOString(note.score),
};
});
const userData = await user.getUsersFields(uids, ['username', 'userslug', 'picture']);
return notes.map(function (note, idx) {
note.user = userData[idx];
note.content = validator.escape(note.content);
return note;
});
}
Flags.deleteNote = async function (flagId, datetime) {
const note = await db.getSortedSetRangeByScore('flag:' + flagId + ':notes', 0, 1, datetime, datetime);
if (!note.length) {
throw new Error('[[error:invalid-data]]');
}
await db.sortedSetRemove('flag:' + flagId + ':notes', note[0]);
};
Flags.create = async function (type, id, uid, reason, timestamp) {
let doHistoryAppend = false;
if (!timestamp) {
timestamp = Date.now();
doHistoryAppend = true;
}
const [flagExists, targetExists,, targetUid, targetCid] = await Promise.all([
// Sanity checks
Flags.exists(type, id, uid),
Flags.targetExists(type, id),
Flags.canFlag(type, id, uid),
// Extra data for zset insertion
Flags.getTargetUid(type, id),
Flags.getTargetCid(type, id),
]);
if (flagExists) {
throw new Error(`[[error:${type}-already-flagged]]`);
} else if (!targetExists) {
throw new Error('[[error:invalid-data]]');
}
const flagId = await db.incrObjectField('global', 'nextFlagId');
await db.setObject('flag:' + flagId, {
flagId: flagId,
type: type,
targetId: id,
description: reason,
uid: uid,
datetime: timestamp,
});
await db.sortedSetAdd('flags:datetime', timestamp, flagId); // by time, the default
await db.sortedSetAdd('flags:byReporter:' + uid, timestamp, flagId); // by reporter
await db.sortedSetAdd('flags:byType:' + type, timestamp, flagId); // by flag type
await db.sortedSetAdd('flags:hash', flagId, [type, id, uid].join(':')); // save zset for duplicate checking
await db.sortedSetIncrBy('flags:byTarget', 1, [type, id].join(':')); // by flag target (score is count)
await analytics.increment('flags'); // some fancy analytics
if (targetUid) {
await db.sortedSetAdd('flags:byTargetUid:' + targetUid, timestamp, flagId); // by target uid
}
if (targetCid) {
await db.sortedSetAdd('flags:byCid:' + targetCid, timestamp, flagId); // by target cid
}
if (type === 'post') {
await db.sortedSetAdd('flags:byPid:' + id, timestamp, flagId); // by target pid
if (targetUid) {
await user.incrementUserFlagsBy(targetUid, 1);
}
}
if (doHistoryAppend) {
await Flags.update(flagId, uid, { state: 'open' });
}
return await Flags.get(flagId);
};
Flags.exists = async function (type, id, uid) {
return await db.isSortedSetMember('flags:hash', [type, id, uid].join(':'));
};
Flags.canFlag = async function (type, id, uid) {
const limit = meta.config['flags:limitPerTarget'];
if (limit > 0) {
const score = await db.sortedSetScore('flags:byTarget', `${type}:${id}`);
if (score >= limit) {
throw new Error(`[[error:${type}-flagged-too-many-times]]`);
}
}
const canRead = await privileges.posts.can('topics:read', id, uid);
switch (type) {
case 'user':
return true;
case 'post':
if (!canRead) {
throw new Error('[[error:no-privileges]]');
}
break;
default:
throw new Error('[[error:invalid-data]]');
}
};
Flags.getTarget = async function (type, id, uid) {
if (type === 'user') {
const userData = await user.getUserData(id);
return userData && userData.uid ? userData : {};
}
if (type === 'post') {
let postData = await posts.getPostData(id);
if (!postData) {
return {};
}
postData = await posts.parsePost(postData);
postData = await topics.addPostData([postData], uid);
return postData[0];
}
throw new Error('[[error:invalid-data]]');
};
Flags.targetExists = async function (type, id) {
if (type === 'post') {
return await posts.exists(id);
} else if (type === 'user') {
return await user.exists(id);
}
throw new Error('[[error:invalid-data]]');
};
Flags.getTargetUid = async function (type, id) {
if (type === 'post') {
return await posts.getPostField(id, 'uid');
}
return id;
};
Flags.getTargetCid = async function (type, id) {
if (type === 'post') {
return await posts.getCidByPid(id);
}
return null;
};
Flags.update = async function (flagId, uid, changeset) {
const current = await db.getObjectFields('flag:' + flagId, ['uid', 'state', 'assignee', 'type', 'targetId']);
const now = changeset.datetime || Date.now();
const notifyAssignee = async function (assigneeId) {
if (assigneeId === '' || parseInt(uid, 10) === parseInt(assigneeId, 10)) {
return;
}
const notifObj = await notifications.create({
type: 'my-flags',
bodyShort: '[[notifications:flag_assigned_to_you, ' + flagId + ']]',
bodyLong: '',
path: '/flags/' + flagId,
nid: 'flags:assign:' + flagId + ':uid:' + assigneeId,
from: uid,
});
await notifications.push(notifObj, [assigneeId]);
};
const isAssignable = async function (assigneeId) {
let allowed = false;
allowed = await user.isAdminOrGlobalMod(assigneeId);
// Mods are also allowed to be assigned, if flag target is post in uid's moderated cid
if (!allowed && current.type === 'post') {
const cid = await posts.getCidByPid(current.targetId);
allowed = await user.isModerator(assigneeId, cid);
}
return allowed;
};
// Retrieve existing flag data to compare for history-saving/reference purposes
const tasks = [];
for (var prop in changeset) {
if (changeset.hasOwnProperty(prop)) {
if (current[prop] === changeset[prop]) {
delete changeset[prop];
} else if (prop === 'state') {
if (!Flags._constants.states.includes(changeset[prop])) {
delete changeset[prop];
} else {
tasks.push(db.sortedSetAdd('flags:byState:' + changeset[prop], now, flagId));
tasks.push(db.sortedSetRemove('flags:byState:' + current[prop], flagId));
if (changeset[prop] === 'resolved' || changeset[prop] === 'rejected') {
tasks.push(notifications.rescind('flag:' + current.type + ':' + current.targetId + ':uid:' + current.uid));
}
}
} else if (prop === 'assignee') {
/* eslint-disable-next-line */
if (!await isAssignable(parseInt(changeset[prop], 10))) {
delete changeset[prop];
} else {
tasks.push(db.sortedSetAdd('flags:byAssignee:' + changeset[prop], now, flagId));
tasks.push(notifyAssignee(changeset[prop]));
}
}
}
}
if (!Object.keys(changeset).length) {
return;
}
tasks.push(db.setObject('flag:' + flagId, changeset));
tasks.push(Flags.appendHistory(flagId, uid, changeset));
tasks.push(plugins.fireHook('action:flags.update', { flagId: flagId, changeset: changeset, uid: uid }));
await Promise.all(tasks);
};
Flags.getHistory = async function (flagId) {
const uids = [];
let history = await db.getSortedSetRevRangeWithScores('flag:' + flagId + ':history', 0, -1);
const flagData = await db.getObjectFields('flag:' + flagId, ['type', 'targetId']);
const targetUid = await Flags.getTargetUid(flagData.type, flagData.targetId);
history = history.map(function (entry) {
entry.value = JSON.parse(entry.value);
uids.push(entry.value[0]);
// Deserialise changeset
const changeset = entry.value[1];
if (changeset.hasOwnProperty('state')) {
changeset.state = changeset.state === undefined ? '' : '[[flags:state-' + changeset.state + ']]';
}
return {
uid: entry.value[0],
fields: changeset,
datetime: entry.score,
datetimeISO: utils.toISOString(entry.score),
};
});
// Append ban history and username change data
history = await mergeBanHistory(history, targetUid, uids);
history = await mergeUsernameEmailChanges(history, targetUid, uids);
const userData = await user.getUsersFields(uids, ['username', 'userslug', 'picture']);
history.forEach((event, idx) => { event.user = userData[idx]; });
// Resort by date
history = history.sort((a, b) => b.datetime - a.datetime);
return history;
};
Flags.appendHistory = async function (flagId, uid, changeset) {
const datetime = changeset.datetime || Date.now();
delete changeset.datetime;
const payload = JSON.stringify([uid, changeset, datetime]);
await db.sortedSetAdd('flag:' + flagId + ':history', datetime, payload);
};
Flags.appendNote = async function (flagId, uid, note, datetime) {
if (datetime) {
await Flags.deleteNote(flagId, datetime);
}
datetime = datetime || Date.now();
const payload = JSON.stringify([uid, note]);
await db.sortedSetAdd('flag:' + flagId + ':notes', datetime, payload);
await Flags.appendHistory(flagId, uid, {
notes: null,
datetime: datetime,
});
};
Flags.notify = async function (flagObj, uid) {
const [admins, globalMods] = await Promise.all([
groups.getMembers('administrators', 0, -1),
groups.getMembers('Global Moderators', 0, -1),
]);
let uids = admins.concat(globalMods);
let notifObj = null;
if (flagObj.type === 'post') {
const [title, cid] = await Promise.all([
topics.getTitleByPid(flagObj.targetId),
posts.getCidByPid(flagObj.targetId),
]);
const modUids = await categories.getModeratorUids([cid]);
const titleEscaped = utils.decodeHTMLEntities(title).replace(/%/g, '%').replace(/,/g, ',');
notifObj = await notifications.create({
type: 'new-post-flag',
bodyShort: '[[notifications:user_flagged_post_in, ' + flagObj.reporter.username + ', ' + titleEscaped + ']]',
bodyLong: flagObj.description,
pid: flagObj.targetId,
path: '/flags/' + flagObj.flagId,
nid: 'flag:post:' + flagObj.targetId + ':uid:' + uid,
from: uid,
mergeId: 'notifications:user_flagged_post_in|' + flagObj.targetId,
topicTitle: title,
});
uids = uids.concat(modUids[0]);
} else if (flagObj.type === 'user') {
notifObj = await notifications.create({
type: 'new-user-flag',
bodyShort: '[[notifications:user_flagged_user, ' + flagObj.reporter.username + ', ' + flagObj.target.username + ']]',
bodyLong: flagObj.description,
path: '/flags/' + flagObj.flagId,
nid: 'flag:user:' + flagObj.targetId + ':uid:' + uid,
from: uid,
mergeId: 'notifications:user_flagged_user|' + flagObj.targetId,
});
} else {
throw new Error('[[error:invalid-data]]');
}
plugins.fireHook('action:flags.create', {
flag: flagObj,
});
uids = uids.filter(_uid => parseInt(_uid, 10) !== parseInt(uid, 10));
await notifications.push(notifObj, uids);
};
async function mergeBanHistory(history, targetUid, uids) {
let recentBans = await db.getSortedSetRevRange('uid:' + targetUid + ':bans:timestamp', 0, 19);
recentBans = await db.getObjects(recentBans);
return history.concat(recentBans.reduce((memo, cur) => {
uids.push(cur.fromUid);
memo.push({
uid: cur.fromUid,
meta: [
{
key: '[[user:banned]]',
value: cur.reason,
labelClass: 'danger',
},
{
key: '[[user:info.banned-expiry]]',
value: new Date(parseInt(cur.expire, 10)).toISOString(),
labelClass: 'default',
},
],
datetime: parseInt(cur.timestamp, 10),
datetimeISO: utils.toISOString(parseInt(cur.timestamp, 10)),
});
return memo;
}, []));
}
async function mergeUsernameEmailChanges(history, targetUid, uids) {
const usernameChanges = await user.getHistory('user:' + targetUid + ':usernames');
const emailChanges = await user.getHistory('user:' + targetUid + ':emails');
return history.concat(usernameChanges.reduce((memo, changeObj) => {
uids.push(targetUid);
memo.push({
uid: targetUid,
meta: [
{
key: '[[user:change_username]]',
value: changeObj.value,
labelClass: 'primary',
},
],
datetime: changeObj.timestamp,
datetimeISO: changeObj.timestampISO,
});
return memo;
}, [])).concat(emailChanges.reduce((memo, changeObj) => {
uids.push(targetUid);
memo.push({
uid: targetUid,
meta: [
{
key: '[[user:change_email]]',
value: changeObj.value,
labelClass: 'primary',
},
],
datetime: changeObj.timestamp,
datetimeISO: changeObj.timestampISO,
});
return memo;
}, []));
}
require('./promisify')(Flags);