Added downloader classes

tripal/includes/TripalFieldDownloader/TripalFASTADownloader.inc

@@ -0,0 +1,5 @@
+<?php
+
+class TripalFASTADownloader extends TripalFieldDownloader {
+
+}

tripal/includes/TripalFieldDownloader/TripalFieldDownloader.inc

@@ -0,0 +1,114 @@
+<?php
+
+
+class TripalFieldDownloader {
+
+  /**
+   * The bundle name.
+   * @var string
+   */
+  protected $bundle_name = '';
+
+  /**
+   * A set of entity IDs. The entities must all be of the same bundle type.
+   */
+  protected $entity_ids = array();
+
+  /**
+   * The set of fields
+   */
+  protected $fields = array();
+
+  /**
+   * The output file URI.
+   */
+  protected $outfile = '';
+
+  /**
+   * Constructs a new instance of the TripalFieldDownloader class.
+   * @param $bundle_name
+   *   The name of the bundle to which the IDs in the $id argument belong.
+   * @param $ids
+   *   An array of entity IDs
+   * @param $fields
+   *   An array of numeric field IDs to use when constructing the download. If
+   *   no fields are provided then all fields that are appropriate for the
+   *   given type will be used.
+   * @param $outfile_name
+   *   The name of the output file to create (minus any extension).
+   * @param $extension
+   *   The extension to add to the end of the output file.
+   */
+  public function __construct($bundle_name, $ids, $fields = array(),
+      $outfile_name = '', $extension = 'txt') {
+    global $user;
+
+    $this->entity_ids = $ids;
+    $this->fields = $fields;
+
+    // Make sure the user directory exists
+    $user_dir = 'public://tripal/users/' . $user->uid;
+    if (!file_prepare_directory($user_dir, FILE_CREATE_DIRECTORY)) {
+      $message = 'Could not access the directory on the server for storing this file.';
+      watchdog('tripal', $message, array(), WATCHDOG_ERROR);
+      drupal_json_output(array(
+        'status'  => 'failed',
+        'message' => $message,
+        'file_id' => '',
+      ));
+      return;
+    }
+
+    if (!$outfile_name) {
+      $outfile_name = unqiueid();
+    }
+
+    $this->outfile = $user_dir. '/' . $outfile_name . '.' . $outfile_ext;
+  }
+
+  /**
+   * Retrieves the URL for the downloadable file.
+   */
+  public function getURL() {
+     return $this0>outfile;
+  }
+
+  /**
+   * Creates the download able file.
+   */
+  public function create() {
+    $fh = fopen($this->outfile, "w");
+    foreach ($this->entity_ids as $entity_id) {
+      $entity = tripal_load_entity('TripalEntity', array($entity_id), FALSE, $this->fields);
+      $content = $this->format($entity, $this->fields);
+      fwrite($fh, $content);
+    }
+    fclose($fh);
+  }
+
+  /**
+   * Setups a download stream for the file.
+   */
+  public function download() {
+
+  }
+
+  /**
+   * Formats the output for a given entity.
+   *
+   * This function should be implemented by a child class. It should iterate
+   * over the fields for the entity and return the appropriate format.
+   *
+   * @param $entity
+   *   The entity object.  The fields that should be formatted are already
+   *   loaded.
+   * @param $fields
+   *   A list of field names that should be formatted.
+   *
+   * @return
+   *   A string containing the formatted output.
+   */
+  protected function format($entity, $fields) {
+
+  }
+}

tripal/includes/TripalFieldDownloader/TripalGFFDownloader.inc

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+<?php
+
+class TripalGFFDownloader extends TripalFieldDownloader {
+
+}

tripal/includes/TripalFieldDownloader/TripalTabCSVDownloader.inc

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+<?php
+
+class TripalCSVDownloader extends TripalFieldDownloader {
+
+}

tripal/includes/TripalFieldDownloader/TripalTabDownloader.inc

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+<?php
+
+class TripalTabDownloader extends TripalFieldDownloader {
+
+}

tripal/includes/TripalFields/TripalFieldFormatter.inc

@@ -1,15 +1,27 @@
 <?php
 
 class TripalFieldFormatter {
-  // The default lable for this field.
+  /**
+   * The default lable for this field.
+   */
   public static $default_label = 'Tripal Field.';
 
-  // The list of field types for which this formatter is appropriate.
+  /**
+   * The list of field types for which this formatter is appropriate.
+   */
   public static $field_types = array();
 
-  // The list of default settings for this formatter.
+  /**
+   *  The list of default settings for this formatter.
+   */
   public static $default_settings = array();
 
+  /**
+   * An array of formatter classes supported by the field.
+   */
+  public static $download_formats = array();
+
+
   /**
    * Instantiates a new TripalFieldFormatter object.
    *