1 <?php
  2 
  3    namespace VersionSwitch;
  4 
  5    use Format;
  6    use IO;
  7    use Service;
  8    use Settings as SET;
  9 
 10    /**
 11     * Abstract version switcher
 12     *
 13     * @author Art <a.molcanovas@gmail.com>
 14     */
 15    abstract class AbstractVersionSwitch {
 16 
 17       /**
 18        * Directories that this switch will affect, e.g. switching PHP versions affects Apache's httpd.conf
 19        *
 20        * @var array
 21        */
 22       protected $dependent_dirs = [];
 23 
 24       /**
 25        * Ini setting
 26        *
 27        * @var string
 28        */
 29       protected $ini;
 30 
 31       /**
 32        * Directory where the binary resides in
 33        *
 34        * @var string
 35        */
 36       protected $dir;
 37 
 38       /**
 39        * Version you're switching from
 40        *
 41        * @var string
 42        */
 43       protected $old_version;
 44 
 45       /**
 46        * Version you're switching to
 47        *
 48        * @var string
 49        */
 50       protected $new_version;
 51 
 52       /**
 53        * Service name
 54        *
 55        * @var string
 56        */
 57       protected $service;
 58 
 59       /**
 60        * Constructor
 61        *
 62        * @author Art <a.molcanovas@gmail.com>
 63        */
 64       function __construct() {
 65          $this->old_version = SET::$s->{$this->ini};
 66          $this->trySwitch();
 67       }
 68 
 69       /**
 70        * Attempts to switch versions
 71        *
 72        * @author Art <a.molcanovas@gmail.com>
 73        * @return AbstractVersionSwitch
 74        */
 75       function trySwitch() {
 76          if(!file_exists($this->dir)) {
 77             die('The module is not installed');
 78          } elseif(!$this->old_version) {
 79             die('Module installation config entry missing');
 80          } else {
 81             $installed_versions = scandir($this->dir);
 82             Format::formatScandir($installed_versions);
 83 
 84             if(count($installed_versions) < 2) {
 85                die('You only have one module version installed');
 86             } else {
 87                _echo('Your current version is ' .
 88                      $this->old_version .
 89                      '. Which version would you like to switch to? Available options are:');
 90 
 91                foreach($installed_versions as $v) {
 92                   echo "\t$v" . PHP_EOL;
 93                }
 94 
 95                $io = IO::readline();
 96 
 97                if(!$io) {
 98                   return $this->trySwitch();
 99                } elseif(!in_array($io, $installed_versions)) {
100                   _echo('You don\'t have that version installed');
101 
102                   return $this->trySwitch();
103                } else {
104                   SET::$s->{$this->ini} = $this->new_version = $io;
105                   SET::$s->save();
106                   $this->updateDependencies()->restartService();
107                }
108             }
109          }
110 
111          return $this;
112       }
113 
114       /**
115        * Restarts any relevant services
116        *
117        * @author Art <a.molcanovas@gmail.com>
118        * @return AbstractVersionSwitch
119        */
120       protected function restartService() {
121          if($this->service) {
122             Service::stop($this->service);
123             for($i = 0; $i < 10; $i++) {
124                _echo('Waiting...');
125             }
126             Service::start($this->service);
127          }
128 
129          return $this;
130       }
131 
132       /**
133        * Updates dependencies
134        *
135        * @author Art <a.molcanovas@gmail.com>
136        * @return AbstractVersionSwitch
137        */
138       function updateDependencies() {
139          $allowed = [DIR_APACHE];
140 
141          _echo('Checking dependencies');
142 
143          foreach($this->dependent_dirs as $d) {
144             if(file_exists($d) && in_array($d, $allowed)) {
145                $scan = scandir($d);
146                Format::formatScandir($scan);
147 
148                if(!empty($scan)) {
149                   $method = $service = false;
150 
151                   switch($d) {
152                      case DIR_APACHE:
153                         $method  = 'updateApache';
154                         $service = 'aloapache';
155                         break;
156                   }
157 
158                   if($method) {
159                      foreach($scan as $version) {
160                         call_user_func([$this, $method], $version);
161                      }
162 
163                      if($service && Service::exists($service)) {
164                         _echo('Restarting service');
165                         Service::stop($service);
166                         for($i = 0; $i < 10; $i++) {
167                            _echo('Waiting...');
168                         }
169                         Service::start($service);
170                      }
171                   }
172                }
173             }
174          }
175 
176          _echo('Switch complete');
177 
178          return $this;
179       }
180 
181       /**
182        * Updates apache settings
183        *
184        * @author Art <a.molcanovas@gmail.com>
185        *
186        * @param string $version Which version to update
187        */
188       protected function updateApache($version) {
189          _echo('Updating Apache ' . $version);
190          $file = DIR_APACHE . $version . DIRECTORY_SEPARATOR . 'conf' . DIRECTORY_SEPARATOR . 'httpd.conf';
191 
192          if(!file_exists($file)) {
193             _echo('Failed to update ' . $version . ': httpd.conf not found');
194          } else {
195             $contents = file_get_contents($file);
196             $contents =
197                str_ireplace('bin' . DIRECTORY_SEPARATOR . 'php' . DIRECTORY_SEPARATOR . $this->old_version,
198                             'bin' . DIRECTORY_SEPARATOR . 'php' . DIRECTORY_SEPARATOR . $this->new_version,
199                             $contents);
200 
201             if(file_put_contents($file, $contents) !== false) {
202                _echo($version . ' updated');
203             } else {
204                _echo('Failed to edit ' . $version . '\'s httpd.conf');
205             }
206          }
207       }
208    }

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