var nest = require('depnest') var { Struct, map, concat, dictToCollection, computed, lookup, watch, keys, resolve } = require('mutant') exports.gives = nest('about.async.suggest') exports.needs = nest({ 'about.obs.groupedValues': 'first', 'about.obs.name': 'first', 'about.obs.imageUrl': 'first', 'contact.obs.following': 'first', 'feed.obs.recent': 'first', 'keys.sync.id': 'first' }) exports.create = function (api) { var suggestions = null var recentSuggestions = null return nest('about.async.suggest', suggest) function suggest () { loadSuggestions() return function (word) { if (!word) return recentSuggestions() return suggestions() .filter((item) => { return item.title.toLowerCase().startsWith(word.toLowerCase()) }) .reverse() } } function loadSuggestions () { if (suggestions) return var id = api.keys.sync.id() var following = api.contact.obs.following(id) var recentlyUpdated = api.feed.obs.recent() var contacts = computed([following, recentlyUpdated], (a, b) => { var result = new Set(a) b.forEach(item => result.add(item)) return Array.from(result) }) recentSuggestions = map( computed(recentlyUpdated, (items) => Array.from(items).slice(0, 10)), suggestion, {idle: true} ) const suggestionsRecord = lookup(contacts, contact => { return [contact, keys(api.about.obs.groupedValues(contact, 'name'))] }) suggestions = concat( map(dictToCollection(suggestionsRecord), pluralSuggestions, {idle: true}) ) watch(recentSuggestions) watch(suggestions) } function pluralSuggestions (item) { const id = resolve(item.key) return map(item.value, name => { return Struct({ id, title: name, subtitle: subtitle(id, name), value: computed([name, id], mention), image: api.about.obs.imageUrl(id), showBoth: true }) }) } function suggestion (id) { var name = api.about.obs.name(id) return Struct({ title: name, id, subtitle: id.substring(0, 10), value: computed([name, id], mention), image: api.about.obs.imageUrl(id), showBoth: true }) } function subtitle (id, name) { return computed([api.about.obs.name(id)], commonName => { return name.toLowerCase() === commonName.toLowerCase() ? id.substring(0, 10) : `${commonName} ${id.substring(0, 10)}` }) } } function mention (name, id) { return `[@${name}](${id})` }