<?php
// $Id$

/**
 * Implementation of hook_requirements().
 */
function imagecache_requirements($phase) {
  $requirements = array();
  // Ensure translations don't break at install time.
  $t = get_t();

  if ($phase == 'runtime') {
    // Check for an image library.
    if (!function_exists('imageapi_menu')) {
      $requirements['imagecache_imageapi'] = array(
        'title' => $t('ImageAPI'),
        'value' => $t('Missing'),
        'severity' => REQUIREMENT_ERROR,
        'description' => $t('Imagecache requires ImageAPI to function.'),
      );
    }
    $imagecache_directory = file_create_path() .'/imagecache';
    if (!file_check_directory($imagecache_directory, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS)) {
      if (!is_dir($imagecache_directory)) {
        $requirements['imagecache_directory'] = array(
          'title' => $t('ImageCache Directory'),
          'value' => $t('%p is not a directory or is not readable by the webserver.', array('%p' => $imagecache_directory)),
          'severity' => REQUIREMENT_ERROR,
        );
      }
      elseif (!is_writable($imagecache_directory)) {
        $requirements['imagecache_directory'] = array(
          'title' => $t('ImageCache Directory'),
          'value' => $t('%p is not writeable by the webserver.', array('%p' => $imagecache_directory)),
          'severity' => REQUIREMENT_ERROR,
        );
      }
      else {
        $requirements['imagecache_directory'] = array(
          'title' => $t('ImageCache Directory'),
          'value' => $t('An unknown error occured.'),
          'description' => $t('An unknown error occured trying to verify %p is a directory and is writable.', array('%p' => $imagecache_directory)),
          'severity' => REQUIREMENT_ERROR,
        );
      }
    }

    if (!is_writable(file_directory_temp())) {
      $requirements['imagecache_directory'] = array(
        'title' => $t('ImageCache Temp Directory'),
        'value' => $t('%p is not writeable by the webserver.', array('%p' => file_directory_temp())),
        'severity' => REQUIREMENT_ERROR,
      );
    }
  }
  return $requirements;
}

function imagecache_install() {
  switch ($GLOBALS['db_type']) {
    case 'mysql':
    case 'mysqli':
      $ret1 = db_query("CREATE TABLE {imagecache_preset} (
            presetid INT UNSIGNED NOT NULL PRIMARY KEY,
            presetname VARCHAR(255) NOT NULL DEFAULT '' )
            /*!40100 DEFAULT CHARACTER SET utf8 */
      ");

      $ret2 = db_query("CREATE TABLE {imagecache_action} (
            actionid INT UNSIGNED NOT NULL PRIMARY KEY,
            presetid INT UNSIGNED NOT NULL DEFAULT 0,
            weight INT NOT NULL DEFAULT 0,
            module varchar(255) not null default '',
            action varchar(255) not null default '',
            data TEXT NOT NULL)
            /*!40100 DEFAULT CHARACTER SET utf8 */
      ");
      break;

    case 'pgsql':
      $ret1 = db_query("CREATE TABLE {imagecache_preset} (
            presetid INTEGER NOT NULL CHECK (presetid > 0),
            presetname VARCHAR(255) NOT NULL DEFAULT '',
            PRIMARY KEY (presetid));
      ");
      $ret2 = db_query("CREATE TABLE {imagecache_action} (
            actionid INTEGER NOT NULL CHECK (actionid > 0),
            presetid INTEGER NOT NULL DEFAULT 0,
            weight INTEGER NOT NULL DEFAULT 0,
            module varchar(255) not null default '',
            action varchar(255) not null default '',
            data TEXT NOT NULL DEFAULT '',
            PRIMARY KEY (actionid));
      ");
      db_query("CREATE SEQUENCE {imagecache_preset}_presetid_seq INCREMENT 1 START 1;");
      db_query("CREATE SEQUENCE {imagecache_action}_actionid_seq INCREMENT 1 START 1;");
      break;
  }

  if ($ret1 && $ret2) {
    drupal_set_message(t('Imagecache module installed succesfully.'));
  }
  else {
    drupal_set_message(t('Imagecache module installation was unsuccessfull. Necessary database tables should be created by hand.', 'error'));
  }
  return $ret;
}

/**
 * Implementation of hook_uninstall().
 */
function imagecache_uninstall() {
  db_query('DROP TABLE {imagecache_preset}');
  db_query('DROP TABLE {imagecache_action}');

  switch ($GLOBALS['db_type']) {
    case 'mysql':
    case 'mysqli':
      db_query("DELETE FROM {sequences} WHERE name = '{imagecache_action}_actionid'");
      db_query("DELETE FROM {sequences} WHERE name = '{imagecache_action}_presetid'");
      break;
    case 'pgsql':
      db_query('DROP SEQUENCE {imagecache_action}_actionid_seq');
      db_query('DROP SEQUENCE {imagecache_preset}_presetid_seq');
      break;
  }
}

// Add action id to actions table.
function imagecache_update_1() {
  $ret = array();
  $ret[] = update_sql('ALTER TABLE {imagecache_actions} ADD COLUMN actionid INT UNSIGNED NOT NULL  primary key auto_increment');
  return $ret;
}

// Rename rulesets to presets; Make all table names singular;
function imagecache_update_2() {
  $ret = array();
  $ret[] = update_sql('ALTER TABLE {imagecache_rulesets} RENAME TO {imagecache_preset}');
  $ret[] = update_sql('ALTER TABLE {imagecache_actions} RENAME TO {imagecache_action}');
  switch ($GLOBALS['db_type']) {
    case 'mysql':
    case 'mysqli':
      $ret[] = update_sql('ALTER TABLE {imagecache_preset} CHANGE rulesetid presetid INT UNSIGNED NOT NULL AUTO_INCREMENT');
      $ret[] = update_sql('ALTER TABLE {imagecache_preset} CHANGE rulesetname presetname VARCHAR(255) NOT NULL DEFAULT \'\'');
      $ret[] = update_sql('ALTER TABLE {imagecache_action} CHANGE rulesetid presetid  INTEGER NOT NULL DEFAULT 0');
      break;

    case 'pgsql':
      $ret[] = update_sql('ALTER TABLE {imagecache_preset} RENAME COLUMN rulesetid TO presetid');
      $ret[] = update_sql('ALTER TABLE {imagecache_preset} RENAME COLUMN rulesetname TO presetname');
      $ret[] = update_sql('ALTER TABLE {imagecache_action} RENAME COLUMN rulesetid TO presetid');
      break;
  }
  return $ret;
}


/**
 * Remove auto-increment from tables, instead depending on the sequences table and db_next_id()
 */
function imagecache_update_3() {
  $ret = array();

  $count_action = db_result(db_query('SELECT max(actionid) FROM {imagecache_action}')) + 1;
  $count_preset = db_result(db_query('SELECT max(presetid) FROM {imagecache_preset}')) + 1;

  switch ($GLOBALS['db_type']) {
    case 'mysql':
    case 'mysqli':
      $ret[] = update_sql("ALTER TABLE {imagecache_action} CHANGE actionid actionid INT UNSIGNED NOT NULL");
      $ret[] = update_sql("ALTER TABLE {imagecache_preset} CHANGE presetid presetid INT UNSIGNED NOT NULL");
      // Add the sequences
      $ret[] = update_sql("INSERT INTO {sequences} (name, id) VALUES ('{imagecache_action}_actionid', $count_action)");
      $ret[] = update_sql("INSERT INTO {sequences} (name, id) VALUES ('{imagecache_preset}_presetid', $count_preset)");
      break;
    case 'pgsql':
      db_change_column($ret, 'imagecache_action', 'actionid', 'actionid', 'INT', $attributes = array('not null' => TRUE, 'default' => '0'));
      db_change_column($ret, 'imagecache_preset', 'presetid', 'presetid', 'INT', $attributes = array('not null' => TRUE, 'default' => '0'));
      // Re-add our indexes
      $ret[] = update_sql("ALTER TABLE {imagecache_action} ADD PRIMARY KEY (actionid)");
      $ret[] = update_sql("ALTER TABLE {imagecache_preset} ADD PRIMARY KEY (rulesetid)");
      // Add the sequences
      $ret[] = update_sql("CREATE SEQUENCE {imagecache_action}_actionid_seq INCREMENT 1 START $count_action;");
      $ret[] = update_sql("CREATE SEQUENCE {imagecache_preset}_presetid_seq INCREMENT 1 START $count_preset;");
  }
  return $ret;
}

function imagecache_update_4() {
  $ret = array();

   // add action column to the imagecache_action table just becuase serialization bugs me.
   switch ($GLOBALS['db_type']) {
    case 'mysql':
    case 'mysqli':
      $ret[] = update_sql("ALTER TABLE {imagecache_action} ADD COLUMN action varchar(255) not null default '' after weight");
       break;
    case 'pgsql':
      $ret[] = update_sql("ALTER TABLE {imagecache_action} ADD COLUMN action varchar(255) NOT NULL DEFAULT ''");
      break;
  }

  // unserialize what we can.
  $result = db_query("SELECT * FROM {imagecache_action}");
  while ($row = db_fetch_array($result)) {
    $data = unserialize($row['data']);

    // remove function from data if present;
    $function = $data['function'];
    unset($data['function']);
    $data = serialize($data);

    // Rename scale and crop for any people who upgraded early...
    if ($function == 'scale and crop') {
      $function = 'scale_and_crop';
    }
    // Keep scale and crop and the old scale function seperate... I don't really want to break BC with
    // the 2.x update. We'll deprecate this version.
    if ($function == 'scale') {
      $function = 'deprecated_scale';
    }

    // prefix with module name as per new status quo.
    // since other modules couldn't implement actions before this update
    // we assume imagecache...
    $function = 'imagecache_'. $function;

    db_query("UPDATE {imagecache_action} SET action='%s', data='%s' WHERE actionid = %d", $function, $data, $row['actionid']);
  }
  cache_clear_all('*', 'cache', TRUE);
  return $ret;
}


function imagecache_update_5() {
  // enable image API.
  module_rebuild_cache(); // make sure new modules are in the system table.
  module_enable(array('imageapi', 'imageapi_gd', 'imageapi_imagemagick')); // enable our new module.

  // @todo: update formatter names: http://cvs.drupal.org/viewvc.py/drupal/contributions/modules/imagecache/imagecache.module?r1=1.68&r2=1.68.2.8&pathrev=DRUPAL-5--2
  // ln: 516 diff 511.

  return array();
}