Files: 0975af1e429bd7b240f035de3051d6ea2cf38c75 / modules / page / html / render / message.js
4665 bytesRaw
1 | var { h, when, map, Proxy, Struct, Value, computed } = require('mutant') |
2 | var nest = require('depnest') |
3 | var ref = require('ssb-ref') |
4 | var AnchorHook = require('../../../../lib/anchor-hook') |
5 | |
6 | exports.needs = nest({ |
7 | 'keys.sync.id': 'first', |
8 | 'feed.obs.thread': 'first', |
9 | 'message.sync.unbox': 'first', |
10 | 'message.sync.root': 'first', |
11 | 'message.html': { |
12 | render: 'first', |
13 | compose: 'first' |
14 | }, |
15 | 'sbot.async.get': 'first', |
16 | 'intl.sync.i18n': 'first', |
17 | 'message.html.missing': 'first' |
18 | }) |
19 | |
20 | exports.gives = nest('page.html.render') |
21 | |
22 | exports.create = function (api) { |
23 | const i18n = api.intl.sync.i18n |
24 | return nest('page.html.render', function (id) { |
25 | if (!ref.isMsg(id)) return |
26 | var loader = h('div', {className: 'Loading -large'}) |
27 | |
28 | var result = Proxy(loader) |
29 | var anchor = Value() |
30 | var participants = Proxy([]) |
31 | |
32 | var meta = Struct({ |
33 | type: 'post', |
34 | root: Proxy(id), |
35 | branch: Proxy(id), |
36 | reply: Proxy(undefined), |
37 | channel: Value(undefined), |
38 | recps: Value(undefined) |
39 | }) |
40 | |
41 | var compose = api.message.html.compose({ |
42 | meta, |
43 | isPrivate: when(meta.recps, true), |
44 | shrink: false, |
45 | participants, |
46 | hooks: [ |
47 | AnchorHook('reply', anchor, (el) => el.focus()) |
48 | ], |
49 | placeholder: when(meta.recps, i18n('Write a private reply'), i18n('Write a public reply')) |
50 | }) |
51 | |
52 | api.sbot.async.get(id, (err, value) => { |
53 | if (err) { |
54 | return result.set(h('PageHeading', [ |
55 | h('h1', i18n('Cannot load thread')) |
56 | ])) |
57 | } |
58 | |
59 | if (typeof value.content === 'string') { |
60 | value = api.message.sync.unbox(value) |
61 | } |
62 | |
63 | if (!value) { |
64 | return result.set(h('PageHeading', [ |
65 | h('h1', i18n('Cannot display message.')) |
66 | ])) |
67 | } |
68 | |
69 | // what happens in private stays in private! |
70 | meta.recps.set(value.content.recps) |
71 | |
72 | var root = api.message.sync.root({key: id, value}) || id |
73 | var isReply = id !== root |
74 | var thread = api.feed.obs.thread(id, {branch: isReply}) |
75 | |
76 | meta.channel.set(value.content.channel) |
77 | meta.root.set(root || thread.rootId) |
78 | |
79 | // track message author for resolving missing messages and reply mentions |
80 | meta.reply.set(computed(thread.messages, messages => { |
81 | var result = {} |
82 | var first = messages[0] |
83 | var last = messages[messages.length - 1] |
84 | |
85 | if (first && first.value) { |
86 | result[messages[0].key] = messages[0].value.author |
87 | } |
88 | |
89 | if (last && last !== first && last.value) { |
90 | result[last.key] = last.value.author |
91 | } |
92 | |
93 | return result |
94 | })) |
95 | |
96 | // if root thread, reply to last post |
97 | meta.branch.set(isReply ? thread.branchId : thread.lastId) |
98 | |
99 | participants.set(computed(thread.messages, messages => { |
100 | return messages.map(msg => msg && msg.value && msg.value.author) |
101 | })) |
102 | |
103 | var container = h('Thread', [ |
104 | h('div.messages', [ |
105 | when(thread.branchId, h('a.full', {href: thread.rootId, anchor: id}, [i18n('View full thread')])), |
106 | map(thread.messages, (msg) => { |
107 | return computed([msg, thread.previousKey(msg)], (msg, previousId) => { |
108 | return h('div', { |
109 | hooks: [AnchorHook(msg.key, anchor, showContext)] |
110 | }, [ |
111 | msg.key !== id ? api.message.html.missing(last(msg.value.content.branch), msg) : null, |
112 | api.message.html.render(msg, { |
113 | pageId: id, |
114 | previousId, |
115 | includeForks: msg.key !== id, |
116 | includeReferences: true |
117 | }) |
118 | ]) |
119 | }) |
120 | }) |
121 | ]), |
122 | compose |
123 | ]) |
124 | result.set(when(thread.sync, container, loader)) |
125 | }) |
126 | |
127 | var view = h('div', {className: 'SplitView'}, [ |
128 | h('div.main', [ |
129 | result |
130 | ]) |
131 | ]) |
132 | |
133 | view.setAnchor = function (value) { |
134 | anchor.set(value) |
135 | } |
136 | |
137 | return view |
138 | }) |
139 | } |
140 | |
141 | function showContext (element) { |
142 | var scrollParent = getScrollParent(element) |
143 | if (scrollParent) { |
144 | // ensure context is visible |
145 | scrollParent.scrollTop = Math.max(0, scrollParent.scrollTop - 100) |
146 | } |
147 | } |
148 | |
149 | function getScrollParent (element) { |
150 | while (element.parentNode) { |
151 | if (element.parentNode.scrollTop > 10 && isScroller(element.parentNode)) { |
152 | return element.parentNode |
153 | } else { |
154 | element = element.parentNode |
155 | } |
156 | } |
157 | } |
158 | |
159 | function isScroller (element) { |
160 | var value = window.getComputedStyle(element)['overflow-y'] |
161 | return (value === 'auto' || value === 'scroll') |
162 | } |
163 | |
164 | function last (array) { |
165 | if (Array.isArray(array)) { |
166 | return array[array.length - 1] |
167 | } else { |
168 | return array |
169 | } |
170 | } |
171 |
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