Files: 637052c9e8948e5ef870c227d291ba5a91efea5f / 4_lastMsgs_live_with_author.js
1860 bytesRaw
1 | const Client = require('ssb-client') |
2 | const pull = require('pull-stream') |
3 | const paraMap = require('pull-paramap') |
4 | const Abortable = require('pull-abortable') |
5 | const get = require('lodash/get') |
6 | |
7 | var minutes = 60*1000 |
8 | |
9 | Client((err, sbot) => { |
10 | if (err) throw err |
11 | |
12 | var someTimeAgo = Number(new Date()) - 60*minutes |
13 | |
14 | pull( |
15 | sbot.createFeedStream({ reverse: true, gt: someTimeAgo, live: true }), // source |
16 | addAuthorName(), |
17 | pull.drain(renderMsg) // sink |
18 | ) |
19 | |
20 | function renderMsg (msg) { |
21 | if (msg.sync) { |
22 | console.log('*** up to date, now listening for new messages ***') |
23 | return |
24 | } |
25 | |
26 | console.log(`author: ${get(msg, 'value.authorName')} (${get(msg, 'value.author')})`) |
27 | console.log('time:', new Date(msg.value.timestamp)) |
28 | console.log('type:', get(msg, 'value.content.type')) |
29 | console.log('text:', get(msg, 'value.content.text')) |
30 | console.log() |
31 | } |
32 | |
33 | function addAuthorName () { |
34 | return paraMap((msg, doneCb) => { |
35 | if (msg.sync) { |
36 | doneCb(null, msg) |
37 | return |
38 | } |
39 | |
40 | // take a msg in, pull out the author id : @yeasdasd..asd |
41 | const id = get(msg, 'value.author') |
42 | const abortable = Abortable() |
43 | |
44 | // create a new user stream, and look for the most recent `about` message they have published |
45 | pull( |
46 | sbot.createUserStream({ id, reverse: true }), |
47 | abortable, |
48 | pull.filter(msg => { |
49 | return get(msg, 'value.content.type') === 'about' && |
50 | get(msg, 'value.content.about') === id |
51 | }), |
52 | pull.drain(aboutMsg => { |
53 | // add the name from that about message to decorate the orignal msg |
54 | msg.value.authorName = get(aboutMsg, 'value.content.name') |
55 | |
56 | doneCb(null, msg) |
57 | |
58 | // abort the stream once you'e found the most recent about msg |
59 | abortable.abort() |
60 | }) |
61 | ) |
62 | }) |
63 | } |
64 | |
65 | }) |
66 | |
67 | |
68 |
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