Decode emails in the queue

Imported from pgeu. Do simple decoding of emails in the queue instead of
just showing the b64-encoded version in the admin interface. Intended to
help with debugging only.

pgweb/mailqueue/admin.py

@@ -1,5 +1,30 @@
 from django.contrib import admin
 
+from email.parser import Parser
+
 from models import QueuedMail
 
-admin.site.register(QueuedMail)
+class QueuedMailAdmin(admin.ModelAdmin):
+	model = QueuedMail
+	readonly_fields = ('parsed_content', )
+
+	def parsed_content(self, obj):
+		# We only try to parse the *first* piece, because we assume
+		# all our emails are trivial.
+		try:
+			parser = Parser()
+			msg = parser.parsestr(obj.fullmsg)
+			b = msg.get_payload(decode=True)
+			if b: return b
+
+			pl = msg.get_payload()
+			for p in pl:
+				b = p.get_payload(decode=True)
+				if b: return b
+			return "Could not find body"
+		except Exception, e:
+			return "Failed to get body: %s" % e
+
+	parsed_content.short_description = 'Parsed mail'
+
+admin.site.register(QueuedMail, QueuedMailAdmin)