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root / class / TilesGenerator.php @ a3184cec

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<?php
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require_once(dirname(__FILE__).'/../constants.inc.php');
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class TilesGeneratorException extends Exception {}
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class TilesGeneratorRightsException extends TilesGeneratorException {}
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class TilesGeneratorScriptException extends TilesGeneratorException {}
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class TilesGenerator {
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        private $panorama;
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        const SCRIPT_RELATIVE_PATH = 'to_tiles/gen_tiles.sh';
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        public function __construct($img_path, $panorama) {
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                /** @param $img_path : path of the source image
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                 *  @param $panorama : a site_point instance
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                 */
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                $this->panorama = $panorama;
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                $this->img_path = $img_path;
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        }
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        public function prepare() {
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                $err = false;
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                $pano_path = $this->panorama->tiles_path();
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                if (! is_dir(PANORAMA_PATH)) {
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                        if (! mkdir(PANORAMA_PATH)) {
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                                $err = "le répertoire \"PANORAMA_PATH\" n'est pas accessible et ne peut être créé";
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                        }
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                } else if (file_exists($pano_path)) {
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                        $err = sprintf("le nom de répertoire \"%s\" est déjà pris",
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                                       $pano_path);
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                } else {
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                        mkdir($pano_path);
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                }
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                if ($err) {
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                        throw (new TilesGeneratorRightsException($err));
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                }
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        }
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        public function mk_command() {
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                /** Returns the command to execute
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                 */
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                $c = sprintf('%s/%s -p "%s" "%s"',
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                             CELUTZ_PATH, $this::SCRIPT_RELATIVE_PATH,
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                             $this->panorama->tiles_prefix(), $this->img_path);
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                return escapeshellcmd($c);
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        }
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        public function process() {
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                $err = false;
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                if ($fp = popen($this->mk_command(), 'r')) {
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                        while (!feof($fp)) {
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                                $results = fgets($fp, 4096);
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                                if (strlen($results) == 0) {
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                                        // stop the browser timing out
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                                        flush();
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                                } else {
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                                        $tok = strtok($results, "\n");
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                                        while ($tok !== false) {
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                                                echo htmlspecialchars(sprintf("%s\n",$tok))."<br/>";
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                                                flush();
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                                                $tok = strtok("\n");
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                                        }
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                                }
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                        }
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                        if (pclose($fp) !== 0) {
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                                $err = "Opération en échec durant l'exécution du script";
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                        }
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                } else {
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                        $err =  'Opération en échec à l\'ouverture du script !';
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                }
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                if ($err) {
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                        throw (new TilesGeneratorScriptException($err));
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                }
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        }
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}
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?>