Commit ef0e10c810ad27d20f17c2d63252757f3d0f4cb9
update index to include timestamps
mix irving committed on 2/15/2018, 2:52:29 AMParent: 8c7fdd33cde838895b5c0ab9073e759d1a631da8
Files changed
| index.js | changed |
| package-lock.json | changed |
| index.js | ||
|---|---|---|
| @@ -1,74 +1,78 @@ | ||
| 1 | 1 … | const FlumeView = require('flumeview-reduce') |
| 2 | 2 … | const get = require('lodash/get') |
| 3 | 3 … | const set = require('lodash/set') |
| 4 | 4 … | |
| 5 | -const FLUME_VIEW_VERSION = 1.0 | |
| 5 … | +const FLUME_VIEW_VERSION = 1.1 | |
| 6 | 6 … | |
| 7 | 7 … | module.exports = { |
| 8 | 8 … | name: 'channel', |
| 9 | 9 … | version: require('./package.json').version, |
| 10 | 10 … | manifest: { |
| 11 | 11 … | get: 'async', |
| 12 | 12 … | stream: 'source', |
| 13 | - subscriptions: 'async' | |
| 13 … | + subscriptions: 'async', | |
| 14 … | + reduce: 'sync' | |
| 14 | 15 … | }, |
| 15 | 16 … | init: (server, config) => { |
| 16 | 17 … | // console.log('///// CHANNELS plugin loaded /////') |
| 17 | 18 … | |
| 18 | 19 … | const view = server._flumeUse( |
| 19 | - 'channels', | |
| 20 … | + 'channel', | |
| 20 | 21 … | FlumeView(FLUME_VIEW_VERSION, reduce, map, null, initialState()) |
| 21 | 22 … | ) |
| 22 | 23 … | |
| 23 | 24 … | return { |
| 24 | 25 … | get: view.get, |
| 25 | 26 … | subscriptions: view.get, |
| 26 | 27 … | stream: view.stream, |
| 28 … | + reduce | |
| 27 | 29 … | } |
| 28 | 30 … | } |
| 29 | 31 … | } |
| 30 | 32 … | |
| 31 | 33 … | function initialState() { |
| 32 | 34 … | return {} |
| 33 | 35 … | } |
| 34 | 36 … | |
| 35 | - | |
| 36 | 37 … | function map(msg) { |
| 37 | 38 … | if (get(msg, 'value.content.type') !== 'channel') return null |
| 38 | 39 … | |
| 39 | 40 … | const author = msg.value.author |
| 40 | - const channel = get(msg, 'value.content.channel') | |
| 41 … | + const timestamp = msg.value.timestamp | |
| 42 … | + const channel = get(msg, 'value.content.channel', '').replace(/^#/, '') | |
| 41 | 43 … | const subscribed = get(msg, 'value.content.subscribed') |
| 42 | 44 … | |
| 43 | 45 … | if (typeof channel === undefined || typeof subscribed === undefined) { |
| 44 | 46 … | console.log('Malformed channel subscription', msg) |
| 45 | 47 … | return null |
| 46 | 48 … | } |
| 47 | 49 … | |
| 48 | 50 … | return { |
| 51 … | + author, | |
| 52 … | + timestamp, | |
| 49 | 53 … | channel, |
| 50 | - author, | |
| 51 | 54 … | subscribed |
| 52 | 55 … | } |
| 53 | 56 … | } |
| 54 | 57 … | |
| 55 | -function reduce(soFar, newSub) { | |
| 58 … | +function reduce (soFar, newSub) { | |
| 56 | 59 … | process.stdout.write('c') |
| 57 | - const { channel, author, subscribed } = newSub | |
| 60 … | + const { author, timestamp, channel, subscribed } = newSub | |
| 58 | 61 … | |
| 59 | - let channelSubs = get(soFar, [channel], []) | |
| 62 … | + var channelSubs = get(soFar, [channel], []) | |
| 63 … | + var current = channelSubs.find(entry => entry[0] === author) | |
| 60 | 64 … | |
| 61 | - channelSubs = new Set(channelSubs) | |
| 65 … | + // if current recorded statement was more recent than this 'newSub', ignore newSub | |
| 66 … | + if (current && current[1] > timestamp) return soFar | |
| 62 | 67 … | |
| 63 | - if (subscribed) { | |
| 64 | - channelSubs.add(author) | |
| 65 | - } else { | |
| 66 | - channelSubs.delete(author) | |
| 67 | - } | |
| 68 … | + // remove all subs entries for this author | |
| 69 … | + channelSubs = channelSubs.filter(entry => entry[0] !== author) | |
| 68 | 70 … | |
| 69 | - soFar[channel] = [...channelSubs] | |
| 71 … | + if (subscribed) channelSubs.push([author, Number(new Date())]) | |
| 70 | 72 … | |
| 73 … | + soFar[channel] = channelSubs | |
| 74 … | + | |
| 71 | 75 … | return soFar |
| 72 | 76 … | } |
| 73 | 77 … | |
| 74 | 78 … | // state: |
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