xmpp: Implement the basis for XEP-0446 and XEP-0447

lib/xmpp/namespaces.dart

@@ -32,3 +32,12 @@ const csiXmlns = "urn:xmpp:csi:0";
 
 // XEP-0359
 const stableIdXmlns = "urn:xmpp:sid:0";
+
+// XEP-0446
+const fileMetadataXmlns = "urn:xmpp:file:metadata:0";
+
+// XEP-0447
+const sfsXmlns = "urn:xmpp:sfs:0";
+
+// ???
+const urlDataXmlns = "http://jabber.org/protocol/url-data";

lib/xmpp/xeps/xep_0446.dart

@@ -0,0 +1,51 @@
+import "package:moxxyv2/xmpp/stringxml.dart";
+import "package:moxxyv2/xmpp/namespaces.dart";
+
+// TODO: Thumbnail
+class FileMetadataData {
+  final String? mediaType;
+
+  // TODO: Maybe create a special type for this
+  final String? dimensions;
+
+  final String? desc;
+  final Map<String, String>? hashes;
+  final int? length;
+  final String? name;
+  final int? size;
+
+  const FileMetadataData({
+      this.mediaType,
+      this.dimensions,
+      this.desc,
+      this.hashes,
+      this.length,
+      this.name,
+      this.size
+  });
+}
+
+FileMetadataData parseFileMetadataElement(XMLNode node) {
+  assert(node.attributes["xmlns"] == fileMetadataXmlns);
+  assert(node.tag == "file");
+
+  final lengthElement = node.firstTag("length");
+  final int? length = lengthElement != null ? int.parse(lengthElement.innerText()) : null;
+  final sizeElement = node.firstTag("size");
+  final int? size = sizeElement != null ? int.parse(sizeElement.innerText()) : null;
+
+  final Map<String, String> hashes = {};
+  for (final e in node.findTags("hash")) {
+    hashes[e.attributes["algo"]] = e.innerText();
+  }
+  
+  return FileMetadataData(
+    mediaType: node.firstTag("media-type")?.innerText(),
+    dimensions: node.firstTag("dimensions")?.innerText(),
+    desc: node.firstTag("desc")?.innerText(),
+    hashes: hashes,
+    length: length,
+    name: node.firstTag("name")?.innerText(),
+    size: size
+  );
+}

lib/xmpp/xeps/xep_0447.dart

@@ -0,0 +1,25 @@
+import "package:moxxyv2/xmpp/stringxml.dart";
+import "package:moxxyv2/xmpp/namespaces.dart";
+import "package:moxxyv2/xmpp/xeps/xep_0446.dart";
+
+class StatelessFileSharingData {
+  final FileMetadataData metadata;
+  final String url;
+
+  const StatelessFileSharingData({ required this.metadata, required this.url });
+}
+
+StatelessFileSharingData parseSFSElement(XMLNode node) {
+  assert(node.attributes["xmlns"] == sfsXmlns);
+  assert(node.tag == "file-sharing");
+
+  final metadata = parseFileMetadataElement(node.firstTag("file")!);
+  final sources = node.firstTag("sources")!;
+  final urldata = sources.firstTag("url-data", xmlns: urlDataXmlns);
+  final url = urldata?.attributes["target"]!;
+
+  return StatelessFileSharingData(
+    metadata: metadata,
+    url: url
+  );
+}

moxxy.doap

@@ -84,5 +84,21 @@
 	<xmpp:version>1.1.0</xmpp:version>
       </xmpp:SupportedXep>
     </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0446.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>0.1.0</xmpp:version>
+	<xmpp:note xml:lang="en">Not connected read-only implementation</xmpp:note>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0447.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>0.1.2</xmpp:version>
+	<xmpp:note xml:lang="en">Not connected read-only implementation</xmpp:note>
+      </xmpp:SupportedXep>
+    </implements>
   </Project>
 </rdf:RDF>