XEP-0264: Jingle Content Thumbnails (new plugin)

Cheogram actually uses it with SIMS to embed
a blurhash preview in the stanza.

slixmpp/plugins/__init__.py

@@ -76,6 +76,7 @@ PLUGINS = [
     'xep_0256',  # Last Activity in Presence
     'xep_0257',  # Client Certificate Management for SASL EXTERNAL
     'xep_0258',  # Security Labels in XMPP
+    'xep_0264',  # Jingle Content Thumbnails
 #   'xep_0270',  # XMPP Compliance Suites 2010. Don’t automatically load
     'xep_0279',  # Server IP Check
     'xep_0280',  # Message Carbons

slixmpp/plugins/xep_0264/__init__.py

@@ -0,0 +1,5 @@
+from slixmpp.plugins.base import register_plugin
+
+from .thumbnail import XEP_0264
+
+register_plugin(XEP_0264)

slixmpp/plugins/xep_0264/stanza.py

@@ -0,0 +1,36 @@
+from typing import Optional
+
+from slixmpp import register_stanza_plugin
+from slixmpp.plugins.xep_0234.stanza import File
+from slixmpp.xmlstream import ElementBase
+
+NS = "urn:xmpp:thumbs:1"
+
+
+class Thumbnail(ElementBase):
+    name = plugin_attrib = "thumbnail"
+    namespace = NS
+    interfaces = {"uri", "media-type", "width", "height"}
+
+    def get_width(self) -> int:
+        return _int_or_none(self._get_attr("width"))
+
+    def get_height(self) -> int:
+        return _int_or_none(self._get_attr("height"))
+
+    def set_width(self, v: int) -> None:
+        self._set_attr("width", str(v))
+
+    def set_height(self, v: int) -> None:
+        self._set_attr("height", str(v))
+
+
+def _int_or_none(v) -> Optional[int]:
+    try:
+        return int(v)
+    except ValueError:
+        return None
+
+
+def register_plugin():
+    register_stanza_plugin(File, Thumbnail)

slixmpp/plugins/xep_0264/thumbnail.py

@@ -0,0 +1,24 @@
+import logging
+
+from slixmpp.plugins import BasePlugin
+
+from . import stanza
+
+log = logging.getLogger(__name__)
+
+
+class XEP_0264(BasePlugin):
+
+    """
+    XEP-0264: Jingle Content Thumbnails
+
+    Can also be used with 0385 (Stateless inline media sharing)
+    """
+
+    name = "xep_0264"
+    description = "XEP-0264: Jingle Content Thumbnails"
+    dependencies = {"xep_0234"}
+    stanza = stanza
+
+    def plugin_init(self):
+        stanza.register_plugin()

slixmpp/pluginsdict.py

@@ -69,6 +69,7 @@ from slixmpp.plugins.xep_0249 import XEP_0249
 from slixmpp.plugins.xep_0256 import XEP_0256
 from slixmpp.plugins.xep_0257 import XEP_0257
 from slixmpp.plugins.xep_0258 import XEP_0258
+from slixmpp.plugins.xep_0264 import XEP_0264
 from slixmpp.plugins.xep_0279 import XEP_0279
 from slixmpp.plugins.xep_0280 import XEP_0280
 from slixmpp.plugins.xep_0297 import XEP_0297
@@ -163,6 +164,7 @@ class PluginsDict(TypedDict):
     xep_0256: XEP_0256
     xep_0257: XEP_0257
     xep_0258: XEP_0258
+    xep_0264: XEP_0264
     xep_0279: XEP_0279
     xep_0280: XEP_0280
     xep_0297: XEP_0297