Mercurial > prosody-modules
view mod_muc_media_metadata/mod_muc_media_metadata.lua @ 4936:a85efae90e21
mod_rest: Expand mapping of XEP-0045 join stanza
The previous 'join' mapping was apparently lost in translation when
swithing to datamapper, so might as well map some properties allowing
history control. Usually you probably want either zero history or
history since the last known time of being joined. Maybe that the former
should be the default?
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sat, 30 Apr 2022 01:00:01 +0200 |
parents | d4537f045a78 |
children |
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local async = require "util.async"; local promise = require "util.promise"; local http = require "net.http"; local st = require "util.stanza"; local xmlns_metadata = "xmpp:prosody.im/protocol/media-metadata#0" local fetch_headers = { bytes = "content-length"; type = "content-type"; etag = "etag"; blurhash = "blurhash"; }; local function fetch_media_metadata(url) return promise.new(function (resolve) http.request(url, { method = "HEAD" }, function (body, code, response) --luacheck: ignore 212/body if code == 200 then local metadata = {}; for metadata_name, header_name in pairs(fetch_headers) do metadata[metadata_name] = response.headers[header_name]; end resolve(metadata); else resolve(nil); end end); end); end local function metadata_to_tag(metadata) if not metadata then return; end local metadata_tag = st.stanza("metadata", { xmlns = xmlns_metadata }); for k, v in pairs(metadata) do metadata_tag:text_tag(k, v) end return metadata_tag; end module:hook("muc-occupant-groupchat", function (event) local stanza = event.stanza; local promises; for oob in stanza:childtags("x", "jabber:x:oob") do if not promises then promises = {}; end local url = oob:get_child_text("url"); local p = fetch_media_metadata(url) :next(metadata_to_tag) :next(function (metadata_tag) oob:add_child(metadata_tag); end); table.insert(promises, p); end if not promises then return; end async.wait(promise.all(promises)); end);