var computed = require('mutant/computed') var nest = require('depnest') exports.needs = nest({ 'keys.sync.id': 'first', 'contact.obs': { followers: 'first', following: 'first', blockers: 'first' } }) exports.gives = nest('profile.obs.contact') exports.create = function (api) { return nest('profile.obs.contact', function (id) { var yourId = api.keys.sync.id() var yourFollowing = api.contact.obs.following(yourId) var yourFollowers = api.contact.obs.followers(yourId) var followers = api.contact.obs.followers(id) var following = api.contact.obs.following(id) var sync = computed([followers.sync, following.sync], (...x) => x.every(Boolean)) var blockers = api.contact.obs.blockers(id) var youBlock = computed(blockers, function (blockers) { return blockers.includes(yourId) }) var youFollow = computed([yourFollowing], function (yourFollowing) { return yourFollowing.includes(id) }) var yourFriends = computed([yourFollowers, yourFollowing], inAllSets) var blockingFriends = computed([yourFollowers, yourFollowing, blockers], inAllSets) var mutualFriends = computed([yourFollowers, yourFollowing, followers, following], inAllSets) var outgoingVia = computed([yourFollowers, following], inAllSets) var incomingVia = computed([yourFollowing, followers], inAllSets) var hasOutgoing = computed([yourFollowers, following], (a, b) => { return a.some((id) => b.includes(id)) }) var hasIncoming = computed([followers, yourFollowing], (a, b) => { return a.some((id) => b.includes(id)) }) var isYou = computed([yourId, id], (a, b) => a === b) var isNotFollowingAnybody = computed([following, following.sync], (following, sync) => { return sync && (!following || !following.length) }) var hasNoFollowers = computed([followers, followers.sync], (followers, sync) => { return sync && (!followers || !followers.length) }) return { followers, following, blockers, blockingFriends, blockingFriendsCount: count(blockingFriends), mutualFriends, mutualFriendsCount: count(mutualFriends), outgoingVia, outgoingViaCount: count(outgoingVia), incomingVia, incomingViaCount: count(incomingVia), hasOutgoing, isNotFollowingAnybody, hasNoFollowers, noOutgoing: not(hasOutgoing, isYou), hasIncoming, noIncoming: not(hasIncoming, isYou), yourId, yourFollowing, yourFollowers, yourFriends, youFollow, youBlock, isYou, notFollowing: not(youFollow, isYou), sync } }) } function inAllSets (first, ...rest) { return first.filter(value => rest.every((collection) => collection.includes(value))) } function not (obs, isFalse) { return computed([obs, isFalse], (x, isFalse) => isFalse ? false : !x) } function count (obs) { return computed(obs, (x) => x.length) }