From 3ad6ed3e92a7f105646708cd2d5892461bd3fb5a Mon Sep 17 00:00:00 2001
From: Mark Spencer <markster@digium.com>
Date: Sat, 1 May 2004 23:28:33 +0000
Subject: [PATCH] Add ability to specify custom e-mail subject line (bug #1291)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2850 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 apps/app_voicemail.c          | 41 +++++++++++++++++++++++++++++------
 configs/voicemail.conf.sample |  3 ++-
 2 files changed, 36 insertions(+), 8 deletions(-)

diff --git a/apps/app_voicemail.c b/apps/app_voicemail.c
index 706cdd9e2e..107ac6ffae 100755
--- a/apps/app_voicemail.c
+++ b/apps/app_voicemail.c
@@ -235,6 +235,7 @@ static char cidinternalcontexts[MAX_NUM_CID_CONTEXTS][64];
 
 static char *emailbody = NULL;
 static int pbxskip = 0;
+static char *emailsubject = NULL;
 static char fromstring[100];
 static char emailtitle[100];
 
@@ -754,6 +755,18 @@ static int base_encode(char *filename, FILE *so)
 	return 1;
 }
 
+static void prep_email_sub_vars(struct ast_channel *ast, struct ast_vm_user *vmu, int msgnum, char *mailbox, char *callerid, char *dur, char *date, char *passdata)
+{
+	/* Prepare variables for substition in email body and subject */
+	pbx_builtin_setvar_helper(ast, "VM_NAME", vmu->fullname);
+	pbx_builtin_setvar_helper(ast, "VM_DUR", dur);
+	sprintf(passdata,"%d",msgnum);
+	pbx_builtin_setvar_helper(ast, "VM_MSGNUM", passdata);
+	pbx_builtin_setvar_helper(ast, "VM_MAILBOX", mailbox);
+	pbx_builtin_setvar_helper(ast, "VM_CALLERID", (callerid ? callerid : "an unknown caller"));
+	pbx_builtin_setvar_helper(ast, "VM_DATE", date);
+}
+
 static int sendmail(char *srcemail, struct ast_vm_user *vmu, int msgnum, char *mailbox, char *callerid, char *attach, char *format, int duration, int attach_user_voicemail)
 {
 	FILE *p=NULL;
@@ -820,6 +833,20 @@ static int sendmail(char *srcemail, struct ast_vm_user *vmu, int msgnum, char *m
 			fprintf(p, "From: Asterisk PBX <%s>\n", who);
 		fprintf(p, "To: %s <%s>\n", vmu->fullname, vmu->email);
 
+		if (emailsubject) {
+			struct ast_channel *ast = ast_channel_alloc(0);
+			if (ast) {
+				char *passdata;
+				int vmlen = strlen(emailsubject)*3 + 200;
+				if ((passdata = alloca(vmlen))) {
+					memset(passdata, 0, vmlen);
+					prep_email_sub_vars(ast,vmu,msgnum + 1,mailbox,callerid,dur,date,passdata);
+					pbx_substitute_variables_helper(ast,emailsubject,passdata,vmlen);
+					fprintf(p, "Subject: %s\n",passdata);
+				} else ast_log(LOG_WARNING, "Cannot allocate workspace for variable substitution\n");
+				ast_channel_free(ast);
+			} else ast_log(LOG_WARNING, "Cannot allocate the channel for variables substitution\n");
+		} else
 		if( *emailtitle)
 		{
 			fprintf(p, emailtitle, msgnum + 1, mailbox) ;
@@ -849,13 +876,7 @@ static int sendmail(char *srcemail, struct ast_vm_user *vmu, int msgnum, char *m
 				int vmlen = strlen(emailbody)*3 + 200;
 				if ((passdata = alloca(vmlen))) {
 					memset(passdata, 0, vmlen);
-					pbx_builtin_setvar_helper(ast, "VM_NAME", vmu->fullname);
-					pbx_builtin_setvar_helper(ast, "VM_DUR", dur);
-					sprintf(passdata,"%d",msgnum);
-					pbx_builtin_setvar_helper(ast, "VM_MSGNUM", passdata);
-					pbx_builtin_setvar_helper(ast, "VM_MAILBOX", mailbox);
-					pbx_builtin_setvar_helper(ast, "VM_CALLERID", (callerid ? callerid : "an unknown caller"));
-					pbx_builtin_setvar_helper(ast, "VM_DATE", date);
+					prep_email_sub_vars(ast,vmu,msgnum + 1,mailbox,callerid,dur,date,passdata);
 					pbx_substitute_variables_helper(ast,emailbody,passdata,vmlen);
 					fprintf(p, "%s\n",passdata);
 				} else ast_log(LOG_WARNING, "Cannot allocate workspace for variable substitution\n");
@@ -3811,12 +3832,18 @@ static int load_config(void)
 			free(emailbody);
 			emailbody = NULL;
 		}
+		if (emailsubject) {
+			free(emailsubject);
+			emailsubject = NULL;
+		}
 		if ((s=ast_variable_retrieve(cfg, "general", "pbxskip")))
 			pbxskip = ast_true(s);
 		if ((s=ast_variable_retrieve(cfg, "general", "fromstring")))
 			strncpy(fromstring,s,sizeof(fromstring)-1);
 		if ((s=ast_variable_retrieve(cfg, "general", "emailtitle")))
 			strncpy(emailtitle,s,sizeof(emailtitle)-1);
+		if ((s=ast_variable_retrieve(cfg, "general", "emailsubject")))
+			emailsubject = strdup(s);
 		if ((s=ast_variable_retrieve(cfg, "general", "emailbody"))) {
 			char *tmpread, *tmpwrite;
 			emailbody = strdup(s);
diff --git a/configs/voicemail.conf.sample b/configs/voicemail.conf.sample
index f21fe2699f..80836515e6 100755
--- a/configs/voicemail.conf.sample
+++ b/configs/voicemail.conf.sample
@@ -36,11 +36,12 @@ maxlogins=3
 ; Change the From: string
 ;fromstring=The Asterisk PBX
 ;
-; Change the email body, variables: 
+; Change the email body and/or subject, variables: 
 ;     VM_NAME, VM_DUR, VM_MSGNUM, VM_MAILBOX, VM_CALLERID, VM_DATE
 ;
 ; Note: The emailbody config row can be up to 512 characters due to a limitation in 
 ;       asterisk config files.
+;emailsubject=New VM (${VM_MSGNUM}) - ${VM_DUR} long in mailbox ${VM_MAILBOX} from ${VM_CALLERID} 
 ;emailbody=Dear ${VM_NAME}:\n\n\tjust wanted to let you know you were just left a ${VM_DUR} long message (number ${VM_MSGNUM})\nin mailbox ${VM_MAILBOX} from ${VM_CALLERID}, on ${VM_DATE} so you might\nwant to check it when you get a chance.  Thanks!\n\n\t\t\t\t--Asterisk\n
 
 ;