334 lines
7.9 KiB
JavaScript
334 lines
7.9 KiB
JavaScript
const pull = require("pull-stream");
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const cat = require("pull-cat");
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const debugPosts = require("debug")("queries:posts"),
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debugMessages = require("debug")("queries:messages"),
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debugFriends = require("debug")("queries:friends"),
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debugFriendshipStatus = require("debug")("queries:friendship_status"),
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debugPeople = require("debug")("queries:people"),
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debugProfile = require("debug")("queries:profile");
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const paramap = require("pull-paramap");
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const { promisePull, mapValues } = require("./utils");
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const latestOwnerValue = (ssbServer, { key, dest }) => {
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return promisePull(
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ssbServer.query.read({
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reverse: true,
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query: [
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{
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$filter: {
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value: {
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author: dest,
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content: { type: "about", about: dest },
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},
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},
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},
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],
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}),
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pull.filter((msg) => {
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return (
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msg.value.content &&
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key in msg.value.content &&
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!(msg.value.content[key] && msg.value.content[key].remove)
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);
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}),
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pull.take(1)
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).then(([entry]) => {
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if (entry) {
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return entry.value.content[key];
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}
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return ssbServer.about.latestValue({ key, dest });
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});
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};
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const mapProfiles = (ssbServer) => (data, callback) =>
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getProfile(ssbServer, data.value.author)
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.then((author) => {
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data.value.authorProfile = author;
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callback(null, data);
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})
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.catch((err) => callback(err, null));
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const getPosts = async (ssbServer, profile) => {
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debugPosts("Fetching");
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const posts = await promisePull(
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// @ts-ignore
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cat([
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ssbServer.query.read({
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reverse: true,
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query: [
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{
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$filter: {
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value: {
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private: { $not: true },
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content: {
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root: profile.id,
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},
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},
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},
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},
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],
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limit: 100,
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}),
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ssbServer.query.read({
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reverse: true,
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query: [
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{
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$filter: {
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value: {
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author: profile.id,
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private: { $not: true },
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content: {
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type: "post",
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root: { $not: true },
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channel: { $not: true },
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},
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},
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},
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},
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],
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limit: 100,
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}),
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]),
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pull.filter((msg) => msg.value.content.type == "post"),
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paramap(mapProfiles(ssbServer))
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);
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debugPosts("Done");
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return mapValues(posts);
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};
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const getVanishingMessages = async (ssbServer, profile) => {
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debugMessages("Fetching");
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const messagesPromise = promisePull(
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// @ts-ignore
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cat([
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ssbServer.private.read({
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reverse: true,
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limit: 100,
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}),
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]),
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pull.filter(
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(msg) =>
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msg.value.content.type == "post" &&
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(msg.value.content.root == profile.id ||
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msg.value.content.recps.includes(profile.id))
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),
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paramap(mapProfiles(ssbServer))
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);
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const deletedPromise = promisePull(
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ssbServer.query.read({
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reverse: true,
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query: [
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{
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$filter: {
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value: {
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author: profile.id,
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content: {
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type: "delete",
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},
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},
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},
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},
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],
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})
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).then(Object.values);
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const [messages, deleted] = await Promise.all([
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messagesPromise,
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deletedPromise,
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]);
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const deletedIds = deleted.map((x) => x.value.content.dest);
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debugMessages("Done");
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return messages.filter((m) => !deletedIds.includes(m.key));
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};
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const searchPeople = async (ssbServer, search) => {
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debugPeople("Fetching");
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const people = await promisePull(
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ssbServer.query.read({
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reverse: true,
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query: [
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{
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$filter: {
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value: {
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content: {
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type: "about",
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name: { $is: "string" },
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},
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},
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},
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},
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],
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}),
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pull.filter((msg) => {
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return (
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msg.value.content &&
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msg.value.author == msg.value.content.about &&
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msg.value.content.name.includes(search)
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);
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})
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);
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debugPeople("Done");
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return Object.values(mapValues(people));
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};
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const getFriends = async (ssbServer, profile) => {
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debugFriends("Fetching");
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let graph = await ssbServer.friends.getGraph();
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let connections = {};
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for (let key in graph) {
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let isFollowing = graph[profile.id] && graph[profile.id][key] > 0;
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let isFollowingBack = graph[key] && graph[key][profile.id] > 0;
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if (isFollowing && isFollowingBack) {
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connections[key] = "friends";
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} else if (isFollowing && !isFollowingBack) {
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connections[key] = "requestsSent";
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} else if (!isFollowing && isFollowingBack) {
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if (!graph[profile.id] || graph[profile.id][key] === undefined)
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connections[key] = "requestsReceived";
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}
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}
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const profilesList = await Promise.all(
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Object.keys(connections).map((id) => getProfile(ssbServer, id))
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);
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const profilesHash = profilesList.reduce((hash, profile) => {
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hash[profile.id] = profile;
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return hash;
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}, {});
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let result = {
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friends: [],
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requestsSent: [],
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requestsReceived: [],
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};
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for (let key in connections) {
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result[connections[key]].push(profilesHash[key]);
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}
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debugFriends("Done");
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return result;
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};
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const getFriendshipStatus = async (ssbServer, source, dest) => {
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debugFriendshipStatus("Fetching");
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let requestRejectionsPromise = promisePull(
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ssbServer.query.read({
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reverse: true,
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query: [
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{
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$filter: {
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value: {
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author: source,
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content: {
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type: "contact",
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following: false,
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},
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},
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},
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},
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],
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limit: 100,
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})
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).then(mapValues);
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const [isFollowing, isFollowingBack, requestRejections] = await Promise.all([
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ssbServer.friends.isFollowing({ source: source, dest: dest }),
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ssbServer.friends.isFollowing({ source: dest, dest: source }),
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requestRejectionsPromise.then((x) => x.map((y) => y.content.contact)),
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]);
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let status = "no_relation";
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if (isFollowing && isFollowingBack) {
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status = "friends";
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} else if (isFollowing && !isFollowingBack) {
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status = "request_sent";
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} else if (!isFollowing && isFollowingBack) {
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if (requestRejections.includes(dest)) {
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status = "request_rejected";
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} else {
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status = "request_received";
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}
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}
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debugFriendshipStatus("Done");
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return status;
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};
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const getAllEntries = (ssbServer, query) => {
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let queries = [];
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if (query.author) {
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queries.push({ $filter: { value: { author: query.author } } });
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}
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if (query.type) {
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queries.push({ $filter: { value: { content: { type: query.type } } } });
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}
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const queryOpts = queries.length > 0 ? { query: queries } : {};
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return promisePull(
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ssbServer.query.read({
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reverse: true,
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limit: 500,
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...queryOpts,
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})
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);
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};
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let profileCache = {};
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const getProfile = async (ssbServer, id) => {
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if (profileCache[id]) return profileCache[id];
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let getKey = (key) => latestOwnerValue(ssbServer, { key, dest: id });
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let [name, image, description] = await Promise.all([
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getKey("name"),
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getKey("image"),
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getKey("description"),
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]).catch((err) => {
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console.error("Could not retrieve profile for", id, err);
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});
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let profile = { id, name, image, description };
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profileCache[id] = profile;
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return profile;
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};
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const progress = (ssbServer, callback) => {
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pull(
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ssbServer.replicate.changes(),
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pull.drain(
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callback,
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(err) => {
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console.error("Progress drain error", err);
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}
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)
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);
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};
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setInterval(() => {
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debugProfile("Clearing profile cache");
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profileCache = {};
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}, 5 * 60 * 1000);
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module.exports = {
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mapProfiles,
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getPosts,
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searchPeople,
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getFriends,
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getAllEntries,
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getProfile,
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getVanishingMessages,
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profileCache,
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getFriendshipStatus,
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progress,
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};
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