Add initial message markup (XEP-0394) support

1 files changed, 81 insertions, 0 deletions

diff --git a/xmpp-vala/src/module/xep/0394_message_markup.vala b/xmpp-vala/src/module/xep/0394_message_markup.vala
new file mode 100644
index 00000000..32b441af
--- /dev/null
+++ b/xmpp-vala/src/module/xep/0394_message_markup.vala
@@ -0,0 +1,81 @@
+using Gee;
+
+namespace Xmpp.Xep.MessageMarkup {
+
+    public const string NS_URI = "urn:xmpp:markup:0";
+
+    public enum SpanType {
+        EMPHASIS,
+        STRONG_EMPHASIS,
+        DELETED,
+    }
+
+    public class Span : Object {
+        public Gee.List<SpanType> types { get; set; }
+        public int start_char { get; set; }
+        public int end_char { get; set; }
+    }
+
+    public Gee.List<Span> get_spans(MessageStanza stanza) {
+        var ret = new ArrayList<Span>();
+
+        foreach (StanzaNode span_node in stanza.stanza.get_deep_subnodes(NS_URI + ":markup", NS_URI + ":span")) {
+            int start_char = span_node.get_attribute_int("start", -1, NS_URI);
+            int end_char = span_node.get_attribute_int("end", -1, NS_URI);
+            if (start_char == -1 || end_char == -1) continue;
+
+            var types = new ArrayList<SpanType>();
+            foreach (StanzaNode span_subnode in span_node.get_all_subnodes()) {
+                types.add(str_to_span_type(span_subnode.name));
+            }
+            ret.add(new Span() { types=types, start_char=start_char, end_char=end_char });
+        }
+        return ret;
+    }
+
+    public void add_spans(MessageStanza stanza, Gee.List<Span> spans) {
+        if (spans.is_empty) return;
+
+        StanzaNode markup_node = new StanzaNode.build("markup", NS_URI).add_self_xmlns();
+
+        foreach (var span in spans) {
+            StanzaNode span_node = new StanzaNode.build("span", NS_URI)
+                    .put_attribute("start", span.start_char.to_string(), NS_URI)
+                    .put_attribute("end", span.end_char.to_string(), NS_URI);
+
+            foreach (var type in span.types) {
+                span_node.put_node(new StanzaNode.build(span_type_to_str(type), NS_URI));
+            }
+            markup_node.put_node(span_node);
+        }
+
+        stanza.stanza.put_node(markup_node);
+    }
+
+    public static string span_type_to_str(Xep.MessageMarkup.SpanType span_type) {
+        switch (span_type) {
+            case Xep.MessageMarkup.SpanType.EMPHASIS:
+                return "emphasis";
+            case Xep.MessageMarkup.SpanType.STRONG_EMPHASIS:
+                return "strong";
+            case Xep.MessageMarkup.SpanType.DELETED:
+                return "deleted";
+            default:
+                return "";
+        }
+    }
+
+    public static Xep.MessageMarkup.SpanType str_to_span_type(string span_str) {
+        switch (span_str) {
+            case "emphasis":
+                return Xep.MessageMarkup.SpanType.EMPHASIS;
+            case "strong":
+                return Xep.MessageMarkup.SpanType.STRONG_EMPHASIS;
+            case "deleted":
+                return Xep.MessageMarkup.SpanType.DELETED;
+            default:
+                return Xep.MessageMarkup.SpanType.EMPHASIS;
+        }
+    }
+
+}
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