icky XPath/namespace parsing is now Blather-native

Denver Gingerich created 9 years ago

We used to catch all iq stanzas and do our own checks to see if they
matched the element name and namespace we were looking for.  Something
like this:

```
	query_node = i.children.find { |v| v.element_name == "query" }
	if query_node.namespace.href ==
		'http://jabber.org/protocol/disco#items'
		...
```

But singpolyma pointed out that this isn't necessary.  So now we use
Blather-native message filtering, and things are much prettier.  And,
more importantly, they are also much more correct.

This diff is fairly small because the largest blocks remain the same
(with the same indentation).  Smaller blocks were moved, de-indented.

Change summary

sgx-catapult.rb | 85 ++++++++++++++++++++++----------------------------
1 file changed, 38 insertions(+), 47 deletions(-)

Detailed changes

sgx-catapult.rb

@@ -47,22 +47,48 @@ module SGXcatapult
 		end
 	end
 
-	iq do |i|
+	iq '/iq/ns:query', :ns =>
+		'http://jabber.org/protocol/disco#items' do |i, xpath_result|
+
 		puts "IQ: #{i.inspect}"
 
-		if i.type == :set
-			puts "received set, likely for jabber:iq:register"
+		msg = Blather::Stanza::Iq::DiscoItems.new
+		msg.id = i.id
+		msg.to = i.from
+		msg.type = 'result'
+
+		puts "RESPONSE0: #{msg.inspect}"
+		write_to_stream msg
+		puts "SENT"
+	end
 
-			# TODO: resilient error handling; what if no query node?
+	iq '/iq/ns:query', :ns =>
+		'http://jabber.org/protocol/disco#info' do |i, xpath_result|
 
-			qn = i.children.find { |v| v.element_name == "query" }
-			# TODO: add below check - as-written has unmatched end
-	i		#if qn.namespace.href != 'jabber:iq:register'
-			#	# TODO: error
-			#	puts "weird xmlns: " + qn.namespace.href
-			#	next
-			#end
+		puts "IQ: #{i.inspect}"
+
+		msg = Blather::Stanza::Iq::DiscoInfo.new
+		msg.id = i.id
+		msg.to = i.from
+		msg.type = 'result'
+
+		msg.identities = [{:name =>
+			'Soprani.ca Gateway to XMPP - Catapult',
+			:type => 'sms-ctplt', :category => 'gateway'}]
+		msg.features = ["jabber:iq:register",
+			"jabber:iq:gateway", "jabber:iq:private",
+			"http://jabber.org/protocol/disco#info",
+			"http://jabber.org/protocol/commands",
+			"http://jabber.org/protocol/muc"]
+		puts "RESPONSE1: #{msg.inspect}"
+		write_to_stream msg
+		puts "SENT"
+	end
 
+	iq '/iq/ns:query', :ns => 'jabber:iq:register' do |i, qn|
+		puts "IQ: #{i.inspect}"
+
+		if i.type == :set
 			xn = qn.children.find { |v| v.element_name == "x" }
 
 			if xn.nil?
@@ -110,42 +136,7 @@ module SGXcatapult
 			write_to_stream msg
 			puts "SENT"
 
-			# TODO: implement this (verify/save data, return result)
-			next
-		end
-
-		query_node = i.children.find { |v| v.element_name == "query" }
-		if query_node.namespace.href ==
-			'http://jabber.org/protocol/disco#items'
-
-			msg = Blather::Stanza::Iq::DiscoItems.new
-			msg.id = i.id
-			msg.to = i.from
-			msg.type = 'result'
-
-			puts "RESPONSE0: #{msg.inspect}"
-			write_to_stream msg
-			puts "SENT"
-		elsif query_node.namespace.href ==
-			'http://jabber.org/protocol/disco#info'
-
-			msg = Blather::Stanza::Iq::DiscoInfo.new
-			msg.id = i.id
-			msg.to = i.from
-			msg.type = 'result'
-
-			msg.identities = [{:name =>
-				'Soprani.ca Gateway to XMPP - Catapult',
-				:type => 'sms-ctplt', :category => 'gateway'}]
-			msg.features = ["jabber:iq:register",
-				"jabber:iq:gateway", "jabber:iq:private",
-				"http://jabber.org/protocol/disco#info",
-				"http://jabber.org/protocol/commands",
-				"http://jabber.org/protocol/muc"]
-			puts "RESPONSE1: #{msg.inspect}"
-			write_to_stream msg
-			puts "SENT"
-		elsif query_node.namespace.href == 'jabber:iq:register'
+		elsif i.type == :get
 			orig = Blather::Stanza::Iq.new
 			orig.id = i.id
 			orig.to = i.from