Files: ed00f21688c47a809f1724a50ce7a3239f9929a6 / message / html / backlinks.js
1330 bytesRaw
| 1 | const nest = require('depnest') |
| 2 | const { h, map, computed, when } = require('mutant') |
| 3 | const ref = require('ssb-ref') |
| 4 | |
| 5 | exports.needs = nest({ |
| 6 | 'message.obs.backlinks': 'first', |
| 7 | 'message.obs.name': 'first', |
| 8 | 'message.async.name': 'first', |
| 9 | 'sbot.sync.cache': 'first' |
| 10 | }) |
| 11 | |
| 12 | exports.gives = nest('message.html.backlinks') |
| 13 | |
| 14 | exports.create = function (api) { |
| 15 | return nest('message.html.backlinks', function (msg) { |
| 16 | if (!ref.isMsg(msg.key)) return [] |
| 17 | var backlinks = api.message.obs.backlinks(msg.key) |
| 18 | var references = computed([backlinks, msg], onlyReferences) |
| 19 | return when(computed(references, hasItems), |
| 20 | h('MessageBacklinks', [ |
| 21 | h('header', 'Referenced:'), |
| 22 | h('ul', [ |
| 23 | map(references, (backlink) => { |
| 24 | return h('li', [ |
| 25 | h('a -backlink', { href: backlink.id, title: backlink.id }, api.message.obs.name(backlink.id)) |
| 26 | ]) |
| 27 | }) |
| 28 | ]) |
| 29 | ]) |
| 30 | ) |
| 31 | }) |
| 32 | } |
| 33 | |
| 34 | function onlyReferences (backlinks, msg) { |
| 35 | return backlinks.filter(link => link.root !== msg.key && !includeOrEqual(link.branch, msg.key)) |
| 36 | } |
| 37 | |
| 38 | function hasItems (items, msg) { |
| 39 | return (items && items.length) |
| 40 | } |
| 41 | |
| 42 | function includeOrEqual (valueOrArray, item) { |
| 43 | if (Array.isArray(valueOrArray)) { |
| 44 | return valueOrArray.includes(item) |
| 45 | } else { |
| 46 | return valueOrArray === item |
| 47 | } |
| 48 | } |
| 49 |
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