Add Multicall Support

Implement multicall support by using an sqlite database to store and
retrieve calls.  Two interfaces have been added:

1) add-call.php.  Used to add calls.
example: add-call.php 15555555555 '0 10-16 * * *' 'http://www.domain.com/xml.xml'

2) create-table.php.  Creates the database file

Created calls are retrieved in the caller.php file.  Each call is run
through the scheduler to verify if it is time for it to be made.

add-call.php

@@ -0,0 +1,34 @@
+<?php
+
+if(count($argv) != 4) {
+  die("Usage: php ./add-call 15555555555 '* * * * *' http://domain.com/file.xml\n");
+}
+
+$phone = $argv[1];
+$schedule = $argv[2];
+$xml = $argv[3];
+
+if(preg_match('/^\d{11}$/', $phone) != 1) {
+  die("Phone should be all numbers with no symbols. ex: 15555555555\n");
+}
+
+if(count(split(' ', $schedule)) != 5) {
+  die("Schedule requires a properly formed cron schedule.\n");
+}
+
+if(!filter_var($xml, FILTER_VALIDATE_URL)) {
+  die("XML must be a vaild url.\n");
+}
+
+try {
+  $db = new PDO('sqlite:db/songcaller.db');
+  $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+} catch(PDOException $e) {
+  die("PDOException (connect): " . $e->getMessage() . "\n");
+}
+try {
+  $db->exec("INSERT INTO calls (phone, schedule, xml) VALUES($phone, '$schedule', '$xml')");
+} catch(PDOException $e) {
+  die("PDOException (query): " . $e->getMessage() . "\n");
+}
+echo "Successfully added call.\n";

caller.php

@@ -3,26 +3,34 @@ require 'vendor/autoload.php';
 require 'vendor/twilio/sdk/Services/Twilio.php';
 
 use Symfony\Component\Yaml\Yaml;
+
 $crontab = new \HybridLogic\Cron\Crontab;
 
-$settings = Yaml::parse('conf/settings.yaml');
+$db = new PDO('sqlite:db/songcaller.db');
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+$settings = Yaml::parse('conf/settings.yml');
 $client = new Services_Twilio(
   $settings['twilio']['sid'],
   $settings['twilio']['token']
 );
 
+$result = $db->query('SELECT * FROM calls');
 
-
-$crontab->add_job(
-  \HybridLogic\Cron\Job::factory('test')
-    ->on('0 10-16 * * *')
-    ->trigger(function() use($settings, $client) {
-      $call = $client->account->calls->create(
-        $settings['application']['from'],
-        $settings['application']['to'],
-        $settings['application']['xml']
-      );
-    })
-);
+foreach($result as $row) {
+  $crontab->add_job(
+    \HybridLogic\Cron\Job::factory('test')
+      ->on($row['schedule'])
+      ->trigger(function() use($settings, $client, $row) {
+        $call = $client->account->calls->create(
+          $settings['application']['from'],
+          $row['phone'],
+          $row['xml']
+        );
+      })
+  );
+}
 
 $crontab->run();
+
+$db = null;

create-table.php

@@ -0,0 +1,10 @@
+<?php
+  $db = new PDO('sqlite:db/songcaller.db');
+  $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+  $db->exec('create table calls (
+  		id integer PRIMARY KEY,
+		phone integer,
+		schedule varchar(50),
+		xml varchar(255)
+		);');