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  • /*
     * Asterisk -- An open source telephony toolkit.
     *
     * Copyright (C) 2005-2006, BJ Weschke. All rights reserved.
     * 
     * BJ Weschke <bweschke@btwtech.com>
     * 
     * This code is released by the author with no restrictions on usage. 
     *
     * 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.
     *
     */
    
    /*! \file
     *
     * \brief REALTIME dialplan function
     * 
     * \author BJ Weschke <bweschke@btwtech.com>
     * 
     * \ingroup functions
     */
    
    
    #include "asterisk.h"
    
    ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
    
    
    #include <stdio.h>
    #include <stdlib.h>
    #include <unistd.h>
    #include <string.h>
    #include <sys/types.h>
    
    #include "asterisk/file.h"
    #include "asterisk/channel.h"
    #include "asterisk/pbx.h"
    #include "asterisk/options.h"
    #include "asterisk/config.h"
    #include "asterisk/module.h"
    #include "asterisk/lock.h"
    #include "asterisk/logger.h"
    #include "asterisk/utils.h"
    #include "asterisk/module.h"
    #include "asterisk/app.h"
    
    LOCAL_USER_DECL;
    
    static char *tdesc = "Read/Write values from a RealTime repository";
    
    static int function_realtime_read(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len) 
    {
    
    	struct ast_variable *var, *head;
    
            struct localuser *u;
    	char *results;
    
    	size_t resultslen = 0;
    
    
    	AST_DECLARE_APP_ARGS(args,
    		AST_APP_ARG(family);
    		AST_APP_ARG(fieldmatch);
    		AST_APP_ARG(value);
    		AST_APP_ARG(delim1);
    		AST_APP_ARG(delim2);
    	);
    
    
    	if (ast_strlen_zero(data)) {
    		ast_log(LOG_WARNING, "Syntax: REALTIME(family|fieldmatch[|value[|delim1[|delim2]]]) - missing argument!\n");
    		return -1;
    
    	}
    	LOCAL_USER_ADD(u);
    	AST_STANDARD_APP_ARGS(args, data);
    
    
    	if (!args.delim1)
    		args.delim1 = "|";
    	if (!args.delim2)
    		args.delim2 = "=";
    
    
    	head = ast_load_realtime(args.family, args.fieldmatch, args.value, NULL);
    
    	if (!head) {
    
    		LOCAL_USER_REMOVE(u);
    		return -1;
    	}
    
    	for (var = head; var; var = var->next)
    		resultslen += strlen(var->name) + strlen(var->value) + 2;
    
    	results = alloca(resultslen);
    	for (var = head; var; var = var->next)
    		ast_build_string(&results, &resultslen, "%s%s%s%s", var->name, args.delim2, var->value, args.delim1);
    
    	ast_copy_string(buf, results, len);
    
    	LOCAL_USER_REMOVE(u);
    	return 0;
    }
    
    static int function_realtime_write(struct ast_channel *chan, char *cmd, char *data, const char *value)
    {
            struct localuser *u;
    	int res = 0;
    
    
    	AST_DECLARE_APP_ARGS(args,
    		AST_APP_ARG(family);
    		AST_APP_ARG(fieldmatch);
    		AST_APP_ARG(value);
    		AST_APP_ARG(field);
    	);
    
    	if (ast_strlen_zero(data)) {
    		ast_log(LOG_WARNING, "Syntax: REALTIME(family|fieldmatch|value|newcol) - missing argument!\n");
    		return -1;
    
    	}
    
    	LOCAL_USER_ADD(u);
    	AST_STANDARD_APP_ARGS(args, data);
    
    
    	res = ast_update_realtime(args.family, args.fieldmatch, args.value, args.field, (char *)value, NULL);
    
    	if (res < 0) {
    		ast_log(LOG_WARNING, "Failed to update. Check the debug log for possible data repository related entries.\n");
    	}
    
    	LOCAL_USER_REMOVE(u);
    	return 0;
    }
    
    struct ast_custom_function realtime_function = {
    	.name = "REALTIME",
    	.synopsis = "RealTime Read/Write Functions",
    	.syntax = "REALTIME(family|fieldmatch[|value[|delim1[|delim2]]]) on read\n"
    		  "REALTIME(family|fieldmatch|value|field) on write\n",
    	.desc = "This function will read or write values from/to a RealTime repository.\n"
    		"REALTIME(....) will read names/values from the repository, and \n"
    		"REALTIME(....)= will write a new value/field to the repository. On a\n"
    		"read, this function returns a delimited text string. The name/value \n"
    		"pairs are delimited by delim1, and the name and value are delimited \n"
    		"between each other with delim2. The default for delim1 is '=' and   \n"
    		"the default for delim2 is '|'. If there is no match, NULL will be   \n"
    		"returned by the function. On a write, this function will always     \n"
    		"return NULL. \n",
    	.read = function_realtime_read,
    	.write = function_realtime_write,
    };
    
    static int unload_module(void *mod)
    {
    
            int res = ast_custom_function_unregister(&realtime_function);
    
    
    	STANDARD_HANGUP_LOCALUSERS;
    
            return res;
    }
    
    static int load_module(void *mod)
    {
    
            int res = ast_custom_function_register(&realtime_function);
    
    
            return res;
    }
    
    static const char *description(void)
    {
            return tdesc;
    }
    
    static const char *key(void)
    {
            return ASTERISK_GPL_KEY;
    }
    
    STD_MOD(MOD_1, NULL, NULL, NULL);