Merged in feature/from-pantheon (pull request #16)

code from pantheon

* code from pantheon

wp/wp-content/plugins/imagify/classes/Context/WP.php

@@ -0,0 +1,146 @@
+<?php
+namespace Imagify\Context;
+
+/**
+ * Context class used for the WP media library.
+ *
+ * @since  1.9
+ * @author Grégory Viguier
+ */
+class WP extends AbstractContext {
+	use \Imagify\Traits\InstanceGetterTrait;
+
+	/**
+	 * Context "short name".
+	 *
+	 * @var    string
+	 * @since  1.9
+	 * @author Grégory Viguier
+	 */
+	protected $context = 'wp';
+
+	/**
+	 * Images max width for this context. This is used when resizing.
+	 *
+	 * @var    int
+	 * @since  1.9.8
+	 * @author Grégory Viguier
+	 */
+	protected $resizing_threshold;
+
+	/**
+	 * Get the thumbnail sizes for this context, except the full size.
+	 *
+	 * @since  1.9
+	 * @author Grégory Viguier
+	 *
+	 * @return array {
+	 *     Data for the currently registered thumbnail sizes.
+	 *     Size names are used as array keys.
+	 *
+	 *     @type int    $width  The image width.
+	 *     @type int    $height The image height.
+	 *     @type bool   $crop   True to crop, false to resize.
+	 *     @type string $name   The size name.
+	 * }
+	 */
+	public function get_thumbnail_sizes() {
+		if ( isset( $this->thumbnail_sizes ) ) {
+			return $this->thumbnail_sizes;
+		}
+
+		$this->thumbnail_sizes = get_imagify_thumbnail_sizes();
+
+		return $this->thumbnail_sizes;
+	}
+
+	/**
+	 * Get images max width for this context. This is used when resizing.
+	 * 0 means to not resize.
+	 *
+	 * @since  1.9.8
+	 * @author Grégory Viguier
+	 *
+	 * @return int
+	 */
+	public function get_resizing_threshold() {
+		if ( isset( $this->resizing_threshold ) ) {
+			return $this->resizing_threshold;
+		}
+
+		if ( ! get_imagify_option( 'resize_larger' ) ) {
+			$this->resizing_threshold = 0;
+		} else {
+			$this->resizing_threshold = max( 0, get_imagify_option( 'resize_larger_w' ) );
+		}
+
+		return $this->resizing_threshold;
+	}
+
+	/**
+	 * Tell if the optimization process is allowed to backup in this context.
+	 *
+	 * @since  1.9
+	 * @author Grégory Viguier
+	 *
+	 * @return bool
+	 */
+	public function can_backup() {
+		if ( isset( $this->can_backup ) ) {
+			return $this->can_backup;
+		}
+
+		$this->can_backup = get_imagify_option( 'backup' );
+
+		return $this->can_backup;
+	}
+
+	/**
+	 * Get user capacity to operate Imagify in this context.
+	 *
+	 * @since  1.9
+	 * @author Grégory Viguier
+	 *
+	 * @param  string $describer Capacity describer. Possible values are like 'manage', 'bulk-optimize', 'manual-optimize', 'auto-optimize'.
+	 * @return string
+	 */
+	public function get_capacity( $describer ) {
+		static $edit_attachment_cap;
+
+		switch ( $describer ) {
+			case 'manage':
+				$capacity = imagify_is_active_for_network() ? 'manage_network_options' : 'manage_options';
+				break;
+
+			case 'bulk-optimize':
+				$capacity = 'manage_options';
+				break;
+
+			case 'optimize':
+			case 'restore':
+				// This is a generic capacity: don't use it unless you have no other choices!
+				if ( ! isset( $edit_attachment_cap ) ) {
+					$edit_attachment_cap = get_post_type_object( 'attachment' );
+					$edit_attachment_cap = $edit_attachment_cap ? $edit_attachment_cap->cap->edit_posts : 'edit_posts';
+				}
+
+				$capacity = $edit_attachment_cap;
+				break;
+
+			case 'manual-optimize':
+			case 'manual-restore':
+				// Must be used with an Attachment ID.
+				$capacity = 'edit_post';
+				break;
+
+			case 'auto-optimize':
+				$capacity = 'upload_files';
+				break;
+
+			default:
+				$capacity = $describer;
+		}
+
+		return $this->filter_capacity( $capacity, $describer );
+	}
+}