Files: ceb725feeb3aac110f9c519878705290803c3ce7 / index.js
1751 bytesRaw
1 | const FlumeView = require('flumeview-reduce') |
2 | const get = require('lodash/get') |
3 | const set = require('lodash/set') |
4 | |
5 | const FLUME_VIEW_VERSION = 1.3 |
6 | |
7 | module.exports = { |
8 | name: 'channels', |
9 | version: require('./package.json').version, |
10 | manifest: { |
11 | get: 'async', |
12 | stream: 'source', |
13 | }, |
14 | init: (server, config) => { |
15 | console.log('///// CHANNELS plugin loaded /////') |
16 | |
17 | const view = server._flumeUse( |
18 | 'channels', |
19 | FlumeView(FLUME_VIEW_VERSION, reduce, map, null, initialState()) |
20 | ) |
21 | |
22 | return { |
23 | get: view.get, |
24 | stream: view.stream, |
25 | } |
26 | } |
27 | } |
28 | |
29 | function initialState () { |
30 | return {} |
31 | } |
32 | |
33 | |
34 | function map (msg) { |
35 | if (get(msg, 'value.content.type') !== 'channel') return null |
36 | |
37 | const author = msg.value.author |
38 | const channel = get(msg, 'value.content.channel') |
39 | const subscribed = get(msg, 'value.content.subscribed') |
40 | |
41 | if (typeof channel === undefined || typeof subscribed === undefined) { |
42 | console.log('Malformed channel subscription', msg) |
43 | return null |
44 | } |
45 | |
46 | return { |
47 | channel, |
48 | author, |
49 | subscribed |
50 | } |
51 | } |
52 | |
53 | function reduce (soFar, newSub) { |
54 | process.stdout.write('c') |
55 | const { channel, author, subscribed } = newSub |
56 | |
57 | const channelSubs = get(soFar, [channel], new Set()) |
58 | if (subscribed) channelSubs.add(author) |
59 | else channelSubs.delete(author) |
60 | |
61 | soFar[channel] = channelSubs |
62 | |
63 | return soFar |
64 | } |
65 | |
66 | // state: |
67 | // { |
68 | // [Channel]: [ Set |
69 | // FeedId |
70 | // ] |
71 | // } |
72 | |
73 | |
74 | // { |
75 | // 'ssb-learning': [ |
76 | // '@ye14....', |
77 | // '@weandre..', |
78 | // ], |
79 | // 'brazil': [ |
80 | // '@weandre..', |
81 | // ] |
82 | // } |
83 | |
84 | // channel message: |
85 | // value: { |
86 | // author: FeedId, |
87 | // content: { |
88 | // { |
89 | // type: 'channel', |
90 | // channel: String, // ssb-learning |
91 | // subscribed: Boolean |
92 | // } |
93 | // } |
94 | // } |
95 | |
96 |
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