Mercurial > hg > extraction-interface

annotate classes/loader.php @ 78:960ba96efce1 extractapp

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author Zoe Hong <zhong@mpiwg-berlin.mpg.de>
date Mon, 20 Apr 2015 15:44:54 +0200
parents 97c1e5102a22
children f1f849d31272
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1 <?php
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2 /**
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3 * Loader is used to route parameters from input url and set parameters for controller.
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4 * The routing is done by the RewriteRule written in .htaccess file.
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5 */
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6
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7 class Loader {
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8 private $controller;
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9 private $action;
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10 private $urlvalues;
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11 private $postdata = 0;
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13 public function __construct($urlvalues, $postdata) {
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14 /**
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15 * It stores the URL values on object creation.
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16 * For example, the URL structure is like this: some_domain_name/Extractapp/TaggingText.
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17 * The controller is "Extractapp" and the action is "TaggingText".
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18 * For the "Extractapp" controller, there is a corresponding "extractapp.php" in "./controllers" folder.
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19 * For the action "TaggingText", there is a corresponding "TaggingText.php" in "./views/Extractapp" folder.
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20 * Under "./view" folder, the first level is named by the controller. Each action belongs to the controller is named by its action name.
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21 */
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23 $this->urlvalues = $urlvalues;
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24 $this->postdata = $postdata;
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25 if ($this->urlvalues['controller'] == "") {
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26 $this->controller = "Extractapp"; // the default controller
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28 } else {
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29 $this->controller = $this->urlvalues['controller'];
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30 }
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32 if ($this->urlvalues['action'] == "") {
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33 $this->action = "TaggingText"; // the default action
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35 } else {
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36 $this->action = $this->urlvalues['action'];
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37 }
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38 }
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39
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40 public function CreateController() {
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41 /**
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42 * Establish the requested controller as an object, and check if the query is valid.
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43 * The queried controller, which should be extended from BaseController, exists and the queried action should be one of its method.
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44 */
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46 //does the class exist?
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47 if (class_exists($this->controller)) {
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48 $parents = class_parents($this->controller);
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49 //does the class extend the controller class?
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50 if (in_array("BaseController",$parents)) {
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51 //does the class contain the requested method?
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52 if (method_exists($this->controller,$this->action)) {
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53 return new $this->controller($this->action,$this->urlvalues,$this->postdata);
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54 } else {
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55 //bad method error
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56 return new Error("badUrl",$this->urlvalues);
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57 }
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58 } else {
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59 //bad controller error
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60 return new Error("badUrl",$this->urlvalues);
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61 }
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62 } else {
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63 //bad controller error
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64 return new Error("badUrl",$this->urlvalues);
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65 }
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66 }
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67 }
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69 ?>