CEL refactoring cleanup

This change removes AST_CEL_BRIDGE_UPDATE since it should no longer be
used because masquerade situations are now accounted for in other ways.

This also refactors usage of AST_CEL_FORWARD to be produced by a Dial
message which has been extended with a "forward" field.

(closes issue ASTERISK-21566)
Review: https://reviewboard.asterisk.org/r/2635/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@392829 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/cel.h

@@ -83,8 +83,6 @@ enum ast_cel_event_type {
 	AST_CEL_USER_DEFINED = 21,
 	/*! \brief the last channel with the given linkedid is retired  */
 	AST_CEL_LINKEDID_END = 22,
-	/*! \brief a masquerade happened to alter the participants on a bridge  */
-	AST_CEL_BRIDGE_UPDATE = 23,
 	/*! \brief a directed pickup was performed on this channel  */
 	AST_CEL_PICKUP = 24,
 	/*! \brief this call was forwarded somewhere else  */
@@ -245,6 +243,26 @@ struct ast_cel_event_record {
  */
 int ast_cel_fill_record(const struct ast_event *event, struct ast_cel_event_record *r);
 
+/*!
+ * \brief Publish a CEL event
+ * \since 12
+ *
+ * \param chan This is the primary channel associated with this channel event.
+ * \param event_type This is the type of call event being reported.
+ * \param blob This contains any additional parameters that need to be conveyed for this event.
+ */
+void ast_cel_publish_event(struct ast_channel *chan,
+	enum ast_cel_event_type event_type,
+	struct ast_json *blob);
+
+/*!
+ * \brief Get the CEL topic
+ *
+ * \retval The CEL topic
+ * \retval NULL if not allocated
+ */
+struct stasis_topic *ast_cel_topic(void);
+
 #if defined(__cplusplus) || defined(c_plusplus)
 }
 #endif

include/asterisk/stasis_channels.h

@@ -454,6 +454,24 @@ void ast_channel_publish_dial(struct ast_channel *caller,
 		const char *dialstring,
 		const char *dialstatus);
 
+/*!
+ * \since 12
+ * \brief Publish in the \ref ast_channel_topic or \ref ast_channel_topic_all
+ * topics a stasis message for the channels involved in a dial operation that
+ * is forwarded.
+ *
+ * \param caller The channel performing the dial operation
+ * \param peer The channel being dialed
+ * \param dialstring The information passed to the dialing application when beginning a dial
+ * \param dialstatus The current status of the dial operation
+ * \param forward The call forward string provided by the dialed channel
+ */
+void ast_channel_publish_dial_forward(struct ast_channel *caller,
+		struct ast_channel *peer,
+		const char *dialstring,
+		const char *dialstatus,
+		const char *forward);
+
 /*!
  * \since 12
  * \brief Publish in the \ref ast_channel_topic a \ref ast_channel_snapshot