mod_muc_media_metadata/README.markdown
author Matthew Wild <mwild1@gmail.com>
Sat, 24 Sep 2022 09:26:26 +0100
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---
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labels:
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- 'Stage-Alpha'
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summary: 'Experimental module to add metadata to media in MUCs'
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...
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# Introduction
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This module adds additional metadata to media shared in a MUC. This can help clients
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make decisions and provide better UI and enhanced privacy, by knowing things like file
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size without needing to make external network requests.
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::: {.alert .alert-danger}
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**NOTE:** This is an experimental module. It is not supported by any
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clients, and therefore is mainly of interest to client developers who
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wish to explore the idea.
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:::
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# Configuring
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## Enabling
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``` {.lua}
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Component "rooms.example.net" "muc"
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modules_enabled = {
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    "muc_media_metadata";
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}
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```
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## Settings
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There are no configuration options for this module.
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# Developers
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## Example stanzas
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A normal message in a chatroom containing an image:
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```
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<message from="test@rooms.example.com/matthew" id="9f45a784-5e5b-4db5-a9b3-8ea1d7c1162d" type="groupchat">
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  <body>https://matthewwild.co.uk/share.php/70334772-ff74-439b-8173-a71e40ca28db/mam-flow.png</body>
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  <x xmlns="jabber:x:oob">
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    <url>https://matthewwild.co.uk/share.php/70334772-ff74-439b-8173-a71e40ca28db/mam-flow.png</url>
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  </x>
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</message>
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```
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The same stanza with this module loaded now contains additional metadata added by the server:
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```
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<message from="test@rooms.example.com/matthew" id="9f45a784-5e5b-4db5-a9b3-8ea1d7c1162d" type="groupchat">
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  <body>https://matthewwild.co.uk/share.php/70334772-ff74-439b-8173-a71e40ca28db/mam-flow.png</body>
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  <x xmlns="jabber:x:oob">
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    <url>https://matthewwild.co.uk/share.php/70334772-ff74-439b-8173-a71e40ca28db/mam-flow.png</url>
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    <metadata xmlns="xmpp:prosody.im/protocol/media-metadata#0">
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      <bytes>15690</bytes>
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      <type>image/png</type>
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      <blurhash>LEHV6nWB2yk8pyo0adR*.7kCMdnj</blurhash>
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    </metadata>
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  </x>
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</message>
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```