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util.dataforms: Add a simple function for identifying form types

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This is meant to allow identifying forms without parsing them
completely.
This commit is contained in:
Kim Alvefur 2018-06-02 19:57:46 +02:00
parent 5b1a236029
commit a7448e43e0
2 changed files with 25 additions and 0 deletions
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9
spec/util_dataforms_spec.lua
View file

@ -301,5 +301,14 @@ describe("util.dataforms", function ()
assert.equal("text-single-value", f:get_child_text("value"));
end);
describe("get_type()", function ()
it("identifes dataforms", function ()
assert.equal(nil, dataforms.get_type(nil));
assert.equal(nil, dataforms.get_type(""));
assert.equal(nil, dataforms.get_type({}));
assert.equal(nil, dataforms.get_type(st.stanza("no-a-form")));
assert.equal("xmpp:prosody.im/spec/util.dataforms#1", dataforms.get_type(xform));
end);
end);
end);

16
util/dataforms.lua
View file

@ -249,8 +249,24 @@ field_readers["hidden"] =
return field_tag:get_child_text("value");
end
local function get_form_type(form)
if not st.is_stanza(form) then
return nil, "not a stanza object";
elseif form.attr.xmlns ~= "jabber:x:data" or form.name ~= "x" then
return nil, "not a dataform element";
end
for field in form:childtags("field") do
if field.attr.var == "FORM_TYPE" then
return field:get_child_text("value");
end
end
return "";
end
return {
new = new;
get_type = get_form_type;
};