+local vcard4 = { }
+
+function vcard4:text(node, params, value)
+ self:tag(node:lower())
+ -- FIXME params
+ if type(value) == "string" then
+ self:tag("text"):text(value):up()
+ elseif vcard4[node] then
+ vcard4[node](value);
+ end
+ self:up();
+end
+
+function vcard4.N(value)
+ for i, k in ipairs(vCard_dtd.N.values) do
+ value:tag(k):text(value[i]):up();
+ end
+end
+
+local xmlns_vcard4 = "urn:ietf:params:xml:ns:vcard-4.0"
+
+local function item_to_vcard4(item)
+ local typ = item.name:lower();
+ local t = st.stanza(typ, { xmlns = xmlns_vcard4 });
+
+ local prop_def = vCard4_dtd[typ];
+ if prop_def == "text" then
+ t:tag("text"):text(item[1]):up();
+ elseif type(prop_def) == "table" then
+ if prop_def.values then
+ for i, v in ipairs(prop_def.values) do
+ t:tag(v:lower()):text(item[i] or ""):up();
+ end
+ else
+ t:tag("unsupported",{xmlns="http://zash.se/protocol/vcardlib"})
+ end
+ else
+ t:tag("unsupported",{xmlns="http://zash.se/protocol/vcardlib"})
+ end
+ return t;
+end
+
+local function vcard_to_vcard4xml(vCard)
+ local t = st.stanza("vcard", { xmlns = xmlns_vcard4 });
+ for i=1,#vCard do
+ t:add_child(item_to_vcard4(vCard[i]));
+ end
+ return t;
+end
+
+local function vcards_to_vcard4xml(vCards)
+ if not vCards[1] or vCards[1].name then
+ return vcard_to_vcard4xml(vCards)
+ else
+ local t = st.stanza("vcards", { xmlns = xmlns_vcard4 });
+ for i=1,#vCards do
+ t:add_child(vcard_to_vcard4xml(vCards[i]));
+ end
+ return t;
+ end
+end
+