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    /*
    
     * Asterisk -- An open source telephony toolkit.
    
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     *
    
     * Copyright (C) 1999 - 2005, Digium, Inc.
    
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     *
    
     * Mark Spencer <markster@digium.com>
    
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     *
    
     * See http://www.asterisk.org for more information about
     * the Asterisk project. Please do not directly contact
     * any of the maintainers of this project for assistance;
     * the project provides a web site, mailing lists and IRC
     * channels for your use.
     *
    
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     * This program is free software, distributed under the terms of
    
     * the GNU General Public License Version 2. See the LICENSE file
     * at the top of the source tree.
     */
    
    
     * \brief Provide a directory of extensions
    
     *
     * \author Mark Spencer <markster@digium.com>
    
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     * \ingroup applications
    
    #include "asterisk.h"
    
    ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
    
    
    #include <string.h>
    #include <ctype.h>
    #include <stdlib.h>
    #include <stdio.h>
    
    
    #include "asterisk/lock.h"
    #include "asterisk/file.h"
    #include "asterisk/logger.h"
    #include "asterisk/channel.h"
    #include "asterisk/pbx.h"
    #include "asterisk/module.h"
    #include "asterisk/config.h"
    #include "asterisk/say.h"
    #include "asterisk/utils.h"
    
    #include "asterisk/app.h"
    
    #ifdef USE_ODBC_STORAGE
    #include <errno.h>
    #include <sys/mman.h>
    #include "asterisk/res_odbc.h"
    
    static char odbc_database[80] = "asterisk";
    static char odbc_table[80] = "voicemessages";
    static char vmfmts[80] = "wav";
    #endif
    
    
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    static char *app = "Directory";
    
    
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    static char *synopsis = "Provide directory of voicemail extensions";
    static char *descrip =
    
    "  Directory(vm-context[|dial-context[|options]]): This application will present\n"
    "the calling channel with a directory of extensions from which they can search\n"
    "by name. The list of names and corresponding extensions is retrieved from the\n"
    "voicemail configuration file, voicemail.conf.\n"
    
    "  This application will immediately exit if one of the following DTMF digits are\n"
    
    "received and the extension to jump to exists:\n"
    "    0 - Jump to the 'o' extension, if it exists.\n"
    "    * - Jump to the 'a' extension, if it exists.\n\n"
    "  Parameters:\n"
    "    vm-context   - This is the context within voicemail.conf to use for the\n"
    "                   Directory.\n"
    "    dial-context - This is the dialplan context to use when looking for an\n"
    "                   extension that the user has selected, or when jumping to the\n"
    "                   'o' or 'a' extension.\n\n"
    "  Options:\n"
    
    "    e - In addition to the name, also read the extension number to the\n"
    "        caller before presenting dialing options.\n"
    
    "    f - Allow the caller to enter the first name of a user in the directory\n"
    
    "        instead of using the last name.\n";
    
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    /* For simplicity, I'm keeping the format compatible with the voicemail config,
       but i'm open to suggestions for isolating it */
    
    
    #define VOICEMAIL_CONFIG "voicemail.conf"
    
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    /* How many digits to read in */
    #define NUMDIGITS 3
    
    
    
    #ifdef USE_ODBC_STORAGE
    static void retrieve_file(char *dir)
    {
    	int x = 0;
    	int res;
    	int fd=-1;
    	size_t fdlen = 0;
    	void *fdm=NULL;
    	SQLHSTMT stmt;
    	char sql[256];
    	char fmt[80]="";
    	char *c;
    	SQLLEN colsize;
    	char full_fn[256];
    
    	odbc_obj *obj;
    	obj = fetch_odbc_obj(odbc_database, 0);
    	if (obj) {
    		do {
    			ast_copy_string(fmt, vmfmts, sizeof(fmt));
    			c = strchr(fmt, '|');
    			if (c)
    				*c = '\0';
    			if (!strcasecmp(fmt, "wav49"))
    				strcpy(fmt, "WAV");
    			snprintf(full_fn, sizeof(full_fn), "%s.%s", dir, fmt);
    			res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
    			if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
    				ast_log(LOG_WARNING, "SQL Alloc Handle failed!\n");
    				break;
    			}
    			snprintf(sql, sizeof(sql), "SELECT recording FROM %s WHERE dir=? AND msgnum=-1", odbc_table);
    			res = SQLPrepare(stmt, (unsigned char *)sql, SQL_NTS);
    			if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
    				ast_log(LOG_WARNING, "SQL Prepare failed![%s]\n", sql);
    				SQLFreeHandle(SQL_HANDLE_STMT, stmt);
    				break;
    			}
    			SQLBindParameter(stmt, 1, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, strlen(dir), 0, (void *)dir, 0, NULL);
    			res = odbc_smart_execute(obj, stmt);
    			if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
    				ast_log(LOG_WARNING, "SQL Execute error!\n[%s]\n\n", sql);
    				SQLFreeHandle(SQL_HANDLE_STMT, stmt);
    				break;
    			}
    			res = SQLFetch(stmt);
    			if (res == SQL_NO_DATA) {
    				SQLFreeHandle(SQL_HANDLE_STMT, stmt);
    				break;
    			} else if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
    				ast_log(LOG_WARNING, "SQL Fetch error!\n[%s]\n\n", sql);
    				SQLFreeHandle(SQL_HANDLE_STMT, stmt);
    				break;
    			}
    			fd = open(full_fn, O_RDWR | O_CREAT | O_TRUNC, 0770);
    			if (fd < 0) {
    				ast_log(LOG_WARNING, "Failed to write '%s': %s\n", full_fn, strerror(errno));
    				SQLFreeHandle(SQL_HANDLE_STMT, stmt);
    				break;
    			}
    
    			res = SQLGetData(stmt, 1, SQL_BINARY, NULL, 0, &colsize);
    			fdlen = colsize;
    			if (fd > -1) {
    				char tmp[1]="";
    				lseek(fd, fdlen - 1, SEEK_SET);
    				if (write(fd, tmp, 1) != 1) {
    					close(fd);
    					fd = -1;
    					break;
    				}
    				if (fd > -1)
    					fdm = mmap(NULL, fdlen, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
    			}
    			if (fdm) {
    				memset(fdm, 0, fdlen);
    				res = SQLGetData(stmt, x + 1, SQL_BINARY, fdm, fdlen, &colsize);
    				if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
    					ast_log(LOG_WARNING, "SQL Get Data error!\n[%s]\n\n", sql);
    					SQLFreeHandle(SQL_HANDLE_STMT, stmt);
    					break;
    				}
    			}
    			SQLFreeHandle(SQL_HANDLE_STMT, stmt);
    		} while (0);
    	} else
    		ast_log(LOG_WARNING, "Failed to obtain database object for '%s'!\n", odbc_database);
    	if (fdm)
    		munmap(fdm, fdlen);
    	if (fd > -1)
    		close(fd);
    	return;
    }
    #endif
    
    
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    {
    	char *tmp;
    	int lcount = 0;
    
    	tmp = ast_malloc(NUMDIGITS + 1);
    
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    	if (tmp) {
    		while((*lastname > 32) && lcount < NUMDIGITS) {
    			switch(toupper(*lastname)) {
    			case '1':
    				tmp[lcount++] = '1';
    				break;
    			case '2':
    			case 'A':
    			case 'B':
    			case 'C':
    				tmp[lcount++] = '2';
    				break;
    			case '3':
    			case 'D':
    			case 'E':
    			case 'F':
    				tmp[lcount++] = '3';
    				break;
    			case '4':
    			case 'G':
    			case 'H':
    			case 'I':
    				tmp[lcount++] = '4';
    				break;
    			case '5':
    			case 'J':
    			case 'K':
    			case 'L':
    				tmp[lcount++] = '5';
    				break;
    			case '6':
    			case 'M':
    			case 'N':
    			case 'O':
    				tmp[lcount++] = '6';
    				break;
    			case '7':
    			case 'P':
    			case 'Q':
    			case 'R':
    			case 'S':
    				tmp[lcount++] = '7';
    				break;
    			case '8':
    			case 'T':
    			case 'U':
    			case 'V':
    				tmp[lcount++] = '8';
    				break;
    			case '9':
    			case 'W':
    			case 'X':
    			case 'Y':
    			case 'Z':
    				tmp[lcount++] = '9';
    				break;
    			}
    			lastname++;
    		}
    		tmp[lcount] = '\0';
    	}
    	return tmp;
    }
    
    
    /* play name of mailbox owner.
     * returns:  -1 for bad or missing extension
     *           '1' for selected entry from directory
     *           '*' for skipped entry from directory
     */
    
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    static int play_mailbox_owner(struct ast_channel *chan, char *context,
    
    		char *dialcontext, char *ext, char *name, int readext,
    		int fromappvm)
    
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    {
    
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    	int loop;
    
    	char fn[256];
    
    	/* Check for the VoiceMail2 greeting first */
    	snprintf(fn, sizeof(fn), "%s/voicemail/%s/%s/greet",
    
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    		ast_config_AST_SPOOL_DIR, context, ext);
    
    #ifdef USE_ODBC_STORAGE
    	retrieve_file(fn);
    #endif
    
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    	if (ast_fileexists(fn, NULL, chan->language) <= 0) {
    		/* no file, check for an old-style Voicemail greeting */
    		snprintf(fn, sizeof(fn), "%s/vm/%s/greet",
    			ast_config_AST_SPOOL_DIR, ext);
    	}
    
    #ifdef USE_ODBC_STORAGE
    	retrieve_file(fn2);
    #endif
    
    
    	if (ast_fileexists(fn, NULL, chan->language) > 0) {
    
    		res = ast_stream_and_wait(chan, fn, chan->language, AST_DIGIT_ANY);
    
    		ast_stopstream(chan);
    
    		/* If Option 'e' was specified, also read the extension number with the name */
    		if (readext) {
    
    			ast_stream_and_wait(chan, "vm-extension", chan->language, AST_DIGIT_ANY);
    
    			res = ast_say_character_str(chan, ext, AST_DIGIT_ANY, chan->language);
    		}
    
    		res = ast_say_character_str(chan, S_OR(name, ext), AST_DIGIT_ANY, chan->language);
    
    		if (!ast_strlen_zero(name) && readext) {
    
    			ast_stream_and_wait(chan, "vm-extension", chan->language, AST_DIGIT_ANY);
    
    			res = ast_say_character_str(chan, ext, AST_DIGIT_ANY, chan->language);
    		}
    
    #ifdef USE_ODBC_STORAGE
    	ast_filedelete(fn, NULL);	
    	ast_filedelete(fn2, NULL);	
    #endif
    
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    	for (loop = 3 ; loop > 0; loop--) {
    
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    		if (!res)
    
    			res = ast_stream_and_wait(chan, "dir-instr", chan->language, AST_DIGIT_ANY);
    
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    		if (!res)
    
    			res = ast_waitfordigit(chan, 3000);
    		ast_stopstream(chan);
    	
    
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    		if (res < 0) /* User hungup, so jump out now */
    			break;
    		if (res == '1') {	/* Name selected */
    
    			if (fromappvm) {
    				/* We still want to set the exten though */
    				ast_copy_string(chan->exten, ext, sizeof(chan->exten));
    			} else {
    				if (ast_goto_if_exists(chan, dialcontext, ext, 1)) {
    					ast_log(LOG_WARNING,
    						"Can't find extension '%s' in context '%s'.  "
    						"Did you pass the wrong context to Directory?\n",
    						ext, dialcontext);
    					res = -1;
    				}
    
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    			}
    			break;
    
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    		if (res == '*') /* Skip to next match in list */
    			break;
    
    		/* Not '1', or '*', so decrement number of tries */
    		res = 0;
    	}
    
    static struct ast_config *realtime_directory(char *context)
    {
    
    	struct ast_config *cfg;
    	struct ast_config *rtdata;
    	struct ast_category *cat;
    	struct ast_variable *var;
    	char *mailbox;
    
    
    	/* Load flat file config. */
    
    	cfg = ast_config_load(VOICEMAIL_CONFIG);
    
    		/* Loading config failed. */
    		ast_log(LOG_WARNING, "Loading config failed.\n");
    
    	/* Get realtime entries, categorized by their mailbox number
    	   and present in the requested context */
    	rtdata = ast_load_realtime_multientry("voicemail", "mailbox LIKE", "%", "context", context, NULL);
    
    	/* if there are no results, just return the entries from the config file */
    	if (!rtdata)
    
    	/* Does the context exist within the config file? If not, make one */
    	cat = ast_category_get(cfg, context);
    	if (!cat) {
    
    		cat = ast_category_new(context);
    		if (!cat) {
    
    			ast_log(LOG_WARNING, "Out of memory\n");
    
    			ast_config_destroy(cfg);
    			return NULL;
    		}
    		ast_category_append(cfg, cat);
    	}
    
    
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    	mailbox = NULL;
    	while ( (mailbox = ast_category_browse(rtdata, mailbox)) ) {
    
    		fullname = ast_variable_retrieve(rtdata, mailbox, "fullname");
    		hidefromdir = ast_variable_retrieve(rtdata, mailbox, "hidefromdir");
    		snprintf(tmp, sizeof(tmp), "no-password,%s,hidefromdir=%s",
    			 fullname ? fullname : "",
    			 hidefromdir ? hidefromdir : "no");
    		var = ast_variable_new(mailbox, tmp);
    		if (var)
    			ast_variable_append(cat, var);
    		else
    			ast_log(LOG_WARNING, "Out of memory adding mailbox '%s'\n", mailbox);
    
    	ast_config_destroy(rtdata);
    
    static int do_directory(struct ast_channel *chan, struct ast_config *cfg, struct ast_config *ucfg, char *context, char *dialcontext, char digit, int last, int readext, int fromappvm)
    
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    {
    	/* Read in the first three digits..  "digit" is the first digit, already read */
    
    	char ext[NUMDIGITS + 1], *cat;
    
    	char name[80] = "";
    
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    	struct ast_variable *v;
    	int res;
    	int found=0;
    
    	int lastuserchoice = 0;
    
    	char *start, *conv, *stringp = NULL;
    	const char *pos;
    
    	if (ast_strlen_zero(context)) {
    
    		ast_log(LOG_WARNING,
    			"Directory must be called with an argument "
    			"(context in which to interpret extensions)\n");
    
    	if (digit == '0') {
    
    		if (!ast_goto_if_exists(chan, dialcontext, "o", 1) ||
    
    		    (!ast_strlen_zero(chan->macrocontext) &&
    
    		     !ast_goto_if_exists(chan, chan->macrocontext, "o", 1))) {
    
    			return 0;
    		} else {
    			ast_log(LOG_WARNING, "Can't find extension 'o' in current context.  "
    				"Not Exiting the Directory!\n");
    			res = 0;
    		}
    	}	
    
    	if (digit == '*') {
    
    		if (!ast_goto_if_exists(chan, dialcontext, "a", 1) ||
    
    		    (!ast_strlen_zero(chan->macrocontext) &&
    
    		     !ast_goto_if_exists(chan, chan->macrocontext, "a", 1))) {
    
    			return 0;
    		} else {
    			ast_log(LOG_WARNING, "Can't find extension 'a' in current context.  "
    				"Not Exiting the Directory!\n");
    			res = 0;
    		}
    	}	
    
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    	memset(ext, 0, sizeof(ext));
    	ext[0] = digit;
    
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    	res = 0;
    
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    	if (ast_readstring(chan, ext + 1, NUMDIGITS - 1, 3000, 3000, "#") < 0) res = -1;
    
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    	if (!res) {
    		/* Search for all names which start with those digits */
    		v = ast_variable_browse(cfg, context);
    		while(v && !res) {
    			/* Find all candidate extensions */
    			while(v) {
    				/* Find a candidate extension */
    				start = strdup(v->value);
    
    				if (start && !strcasestr(start, "hidefromdir=yes")) {
    
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    					stringp=start;
    					strsep(&stringp, ",");
    					pos = strsep(&stringp, ",");
    
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    					if (pos) {
    
    						ast_copy_string(name, pos, sizeof(name));
    
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    						/* Grab the last name */
    
    						if (last && strrchr(pos,' '))
    
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    							pos = strrchr(pos, ' ') + 1;
    						conv = convert(pos);
    						if (conv) {
    							if (!strcmp(conv, ext)) {
    								/* Match! */
    								found++;
    								free(conv);
    								free(start);
    								break;
    							}
    							free(conv);
    						}
    					}
    					free(start);
    				}
    				v = v->next;
    			}
    
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    			if (v) {
    				/* We have a match -- play a greeting if they have it */
    
    				res = play_mailbox_owner(chan, context, dialcontext, v->name, name, readext, fromappvm);
    
    				switch (res) {
    					case -1:
    
    						/* user pressed '1' but extension does not exist, or
    						 * user hungup
    						 */
    
    						lastuserchoice = 0;
    
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    						break;
    
    						/* user pressed '1' and extensions exists;
    						   play_mailbox_owner will already have done
    						   a goto() on the channel
    						 */
    
    						lastuserchoice = res;
    						break;
    					case '*':
    						/* user pressed '*' to skip something found */
    						lastuserchoice = res;
    
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    						res = 0;
    
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    				}
    
    		if (!res && ucfg) {
    			/* Search users.conf for all names which start with those digits */
    			for (cat = ast_category_browse(ucfg, NULL); cat && !res ; cat = ast_category_browse(ucfg, cat)) {
    				if (!strcasecmp(cat, "general"))
    					continue;
    				if (!ast_true(ast_config_option(ucfg, cat, "hasdirectory")))
    					continue;
    				
    				/* Find all candidate extensions */
    				if ((pos = ast_variable_retrieve(ucfg, cat, "fullname"))) {
    					ast_copy_string(name, pos, sizeof(name));
    					/* Grab the last name */
    					if (last && strrchr(pos,' '))
    						pos = strrchr(pos, ' ') + 1;
    					conv = convert(pos);
    					if (conv) {
    						if (!strcmp(conv, ext)) {
    							/* Match! */
    							found++;
    							/* We have a match -- play a greeting if they have it */
    							res = play_mailbox_owner(chan, context, dialcontext, cat, name, readext, fromappvm);
    							switch (res) {
    							case -1:
    								/* user pressed '1' but extension does not exist, or
    								 * user hungup
    								 */
    								lastuserchoice = 0;
    								break;
    							case '1':
    								/* user pressed '1' and extensions exists;
    								   play_mailbox_owner will already have done
    								   a goto() on the channel
    								 */
    								lastuserchoice = res;
    								break;
    							case '*':
    								/* user pressed '*' to skip something found */
    								lastuserchoice = res;
    								res = 0;
    								break;
    							default:
    								break;
    							}
    							free(conv);
    							break;
    						}
    						free(conv);
    					}
    				}
    			}
    		}
    			
    
    		if (lastuserchoice != '1') {
    
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    			res = ast_streamfile(chan, found ? "dir-nomore" : "dir-nomatch", chan->language);
    
    			if (!res)
    				res = 1;
    			return res;
    		}
    
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    	}
    	return res;
    }
    
    static int directory_exec(struct ast_channel *chan, void *data)
    {
    	int res = 0;
    
    	struct ast_config *cfg, *ucfg;
    
    	AST_DECLARE_APP_ARGS(args,
    		AST_APP_ARG(vmcontext);
    		AST_APP_ARG(dialcontext);
    		AST_APP_ARG(options);
    	);
    
    	if (ast_strlen_zero(data)) {
    
    		ast_log(LOG_WARNING, "Directory requires an argument (context[,dialcontext])\n");
    
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    		return -1;
    	}
    
    	u = ast_module_user_add(chan);
    
    	AST_STANDARD_APP_ARGS(args, parse);
    		
    	if (args.options) {
    		if (strchr(args.options, 'f'))
    			last = 0;
    
    		if (strchr(args.options, 'e'))
    			readext = 1;
    
    		if (strchr(args.options, 'v'))
    			fromappvm = 1;
    
    	}
    
    	if (ast_strlen_zero(args.dialcontext))	
    		args.dialcontext = args.vmcontext;
    
    	cfg = realtime_directory(args.vmcontext);
    
    		ast_log(LOG_ERROR, "Unable to read the configuration data!\n");
    
    	
    	ucfg = ast_config_load("users.conf");
    
    	dirintro = ast_variable_retrieve(cfg, args.vmcontext, "directoryintro");
    
    	if (ast_strlen_zero(dirintro))
    
    		dirintro = ast_variable_retrieve(cfg, "general", "directoryintro");
    
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    	if (ast_strlen_zero(dirintro))
    		dirintro = last ? "dir-intro" : "dir-intro-fn";
    
    	if (chan->_state != AST_STATE_UP) 
    		res = ast_answer(chan);
    
    			res = ast_stream_and_wait(chan, dirintro, chan->language, AST_DIGIT_ANY);
    
    		ast_stopstream(chan);
    		if (!res)
    			res = ast_waitfordigit(chan, 5000);
    		if (res > 0) {
    
    			res = do_directory(chan, cfg, ucfg, args.vmcontext, args.dialcontext, res, last, readext, fromappvm);
    
    			if (res > 0) {
    				res = ast_waitstream(chan, AST_DIGIT_ANY);
    				ast_stopstream(chan);
    
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    				if (res >= 0)
    
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    	}
    
    	if (ucfg)
    		ast_config_destroy(ucfg);
    
    	ast_config_destroy(cfg);
    
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    	return res;
    }
    
    
    static int unload_module(void)
    
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    {
    
    	int res;
    	res = ast_unregister_application(app);
    	return res;
    
    static int load_module(void)
    
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    {
    
    #ifdef USE_ODBC_STORAGE
    	struct ast_config *cfg = ast_config_load(VOICEMAIL_CONFIG);
    	char *tmp;
    
    	if (cfg) {
    		if ((tmp = ast_variable_retrieve(cfg, "general", "odbcstorage"))) {
    			ast_copy_string(odbc_database, tmp, sizeof(odbc_database));
    		}
    		if ((tmp = ast_variable_retrieve(cfg, "general", "odbctable"))) {
    			ast_copy_string(odbc_table, tmp, sizeof(odbc_table));
    		}
    		if ((tmp = ast_variable_retrieve(cfg, "general", "format"))) {
    			ast_copy_string(vmfmts, tmp, sizeof(vmfmts));
    		}
    		ast_config_destroy(cfg);
    	} else
    		ast_log(LOG_WARNING, "Unable to load " VOICEMAIL_CONFIG " - ODBC defaults will be used\n");
    #endif
    
    
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    	return ast_register_application(app, directory_exec, synopsis, descrip);
    
    AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Extension Directory");