<?php
class TrelloBridge extends BridgeAbstract {
	const NAME = 'Trello Bridge';
	const URI = 'https://trello.com/';
	const CACHE_TIMEOUT = 300; // 5min
	const DESCRIPTION = 'Returns activity on Trello boards or cards';
	const MAINTAINER = 'Roliga';
	const PARAMETERS = array(
		'Board' => array(
			'b' => array(
				'name' => 'Board ID',
				'required' => true,
				'exampleValue' => 'g9mdhdzg',
				'title' => 'Taken from Trello URL, e.g. trello.com/b/[Board ID]'
			)
		),
		'Card' => array(
			'c' => array(
				'name' => 'Card ID',
				'required' => true,
				'exampleValue' => '8vddc9pE',
				'title' => 'Taken from Trello URL, e.g. trello.com/c/[Card ID]'
			)
		)
	);

	/*
	 * This was extracted from webpack on a Trello page, e.g. trello.com/b/g9mdhdzg
	 * In the browser's inspector/debugger go to the Debugger (Firefox) or
	 * Sources (Chromium) tab, these values can be found at:
	 * webpack:///resources/strings/actions/en.json
	 */
	const ACTION_TEXTS = array(
		'action_accept_enterprise_join_request'
			=> '{memberCreator} added team {organization} to the enterprise {enterprise}',
		'action_add_attachment_to_card'
			=> '{memberCreator} attached {attachment} to {card} {attachmentPreview}',
		'action_add_attachment_to_card@card'
			=> '{memberCreator} attached {attachment} to this card {attachmentPreview}',
		'action_add_checklist_to_card'
			=> '{memberCreator} added {checklist} to {card}',
		'action_add_checklist_to_card@card'
			=> '{memberCreator} added {checklist} to this card',
		'action_add_label_to_card'
			=> '{memberCreator} added the {label} label to {card}',
		'action_add_label_to_card@card'
			=> '{memberCreator} added the {label} label to this card',
		'action_add_organization_to_enterprise'
			=> '{memberCreator} added team {organization} to the enterprise {enterprise}',
		'action_add_to_organization_board'
			=> '{memberCreator} added {board} to {organization}',
		'action_add_to_organization_board@board'
			=> '{memberCreator} added this board to {organization}',
		'action_added_a_due_date'
			=> '{memberCreator} set {card} to be due {date}',
		'action_added_a_due_date@card'
			=> '{memberCreator} set this card to be due {date}',
		'action_added_list_to_board'
			=> '{memberCreator} added list {list} to {board}',
		'action_added_list_to_board@board'
			=> '{memberCreator} added {list} to this board',
		'action_added_member_to_board'
			=> '{memberCreator} added {member} to {board}',
		'action_added_member_to_board@board'
			=> '{memberCreator} added {member} to this board',
		'action_added_member_to_board_as_admin'
			=> '{memberCreator} added {member} to {board} as an admin',
		'action_added_member_to_board_as_admin@board'
			=> '{memberCreator} added {member} to this board as an admin',
		'action_added_member_to_board_as_observer'
			=> '{memberCreator} added {member} to {board} as an observer',
		'action_added_member_to_board_as_observer@board'
			=> '{memberCreator} added {member} to this board as an observer',
		'action_added_member_to_card'
			=> '{memberCreator} added {member} to {card}',
		'action_added_member_to_card@card'
			=> '{memberCreator} added {member} to this card',
		'action_added_member_to_organization'
			=> '{memberCreator} added {member} to {organization}',
		'action_added_member_to_organization_as_admin'
			=> '{memberCreator} added {member} to {organization} as an admin',
		'action_admins_visibility'
			=> 'its admins',
		'action_another_board'
			=> 'another board',
		'action_archived_card'
			=> '{memberCreator} archived {card}',
		'action_archived_card@card'
			=> '{memberCreator} archived this card',
		'action_archived_list'
			=> '{memberCreator} archived list {list}',
		'action_became_a_normal_user_in_organization'
			=> '{memberCreator} became a normal user in {organization}',
		'action_became_a_normal_user_on'
			=> '{memberCreator} became a normal user on {board}',
		'action_became_a_normal_user_on@board'
			=> '{memberCreator} became a normal user on this board',
		'action_became_an_admin_of_organization'
			=> '{memberCreator} became an admin of {organization}',
		'action_board_perm_level'
			=> '{memberCreator} made {board} visible to {level}',
		'action_board_perm_level@board'
			=> '{memberCreator} made this board visible to {level}',
		'action_calendar'
			=> 'calendar',
		'action_cardAging'
			=> 'card aging',
		'action_changed_a_due_date'
			=> '{memberCreator} changed the due date of {card} to {date}',
		'action_changed_a_due_date@card'
			=> '{memberCreator} changed the due date of this card to {date}',
		'action_changed_board_background'
			=> '{memberCreator} changed the background of {board}',
		'action_changed_board_background@board'
			=> '{memberCreator} changed the background of this board',
		'action_changed_description_of_card'
			=> '{memberCreator} changed description of {card}',
		'action_changed_description_of_card@card'
			=> '{memberCreator} changed description of this card',
		'action_changed_description_of_organization'
			=> '{memberCreator} changed description of {organization}',
		'action_changed_display_name_of_organization'
			=> '{memberCreator} changed display name of {organization}',
		'action_changed_name_of_organization'
			=> '{memberCreator} changed name of {organization}',
		'action_changed_website_of_organization'
			=> '{memberCreator} changed website of {organization}',
		'action_closed_board'
			=> '{memberCreator} closed {board}',
		'action_closed_board@board'
			=> '{memberCreator} closed this board',
		'action_comment_on_card'
			=> '{memberCreator} {contextOn} {card} {comment}',
		'action_comment_on_card@card'
			=> '{memberCreator} {comment}',
		'action_completed_checkitem'
			=> '{memberCreator} completed {checkitem} on {card}',
		'action_completed_checkitem@card'
			=> '{memberCreator} completed {checkitem} on this card',
		'action_convert_to_card_from_checkitem'
			=> '{memberCreator} converted {card} from a checklist item on {cardSource}',
		'action_convert_to_card_from_checkitem@card'
			=> '{memberCreator} converted this card from a checklist item on {cardSource}',
		'action_convert_to_card_from_checkitem@cardSource'
			=> '{memberCreator} converted {card} from a checklist item on this card',
		'action_copy_board'
			=> '{memberCreator} copied this board from {board}',
		'action_copy_card'
			=> '{memberCreator} copied {card} from {cardSource} in list {list}',
		'action_copy_card@card'
			=> '{memberCreator} copied this card from {cardSource} in list {list}',
		'action_copy_comment_from_card'
			=> '{memberCreator} copied comment by {member} from card {card} {comment}',
		'action_create_board'
			=> '{memberCreator} created {board}',
		'action_create_board@board'
			=> '{memberCreator} created this board',
		'action_create_card'
			=> '{memberCreator} added {card} to {list}',
		'action_create_card@card'
			=> '{memberCreator} added this card to {list}',
		'action_create_custom_field'
			=> '{memberCreator} created the {customField} custom field on {board}',
		'action_create_custom_field@board'
			=> '{memberCreator} created the {customField} custom field on this board',
		'action_create_enterprise_join_request'
			=> '{memberCreator} requested to add team {organization} to the enterprise {enterprise}',
		'action_created_an_invitation_to_board'
			=> '{memberCreator} created an invitation to {board}',
		'action_created_an_invitation_to_board@board'
			=> '{memberCreator} created an invitation to this board',
		'action_created_an_invitation_to_organization'
			=> '{memberCreator} created an invitation to {organization}',
		'action_created_checklist_on_board'
			=> '{memberCreator} created {checklist} on {board}',
		'action_created_checklist_on_board@board'
			=> '{memberCreator} created {checklist} on this board',
		'action_created_organization'
			=> '{memberCreator} created {organization}',
		'action_decline_enterprise_join_request'
			=> '{memberCreator} declined the request to add team {organization} to the enterprise {enterprise}',
		'action_delete_attachment_from_card'
			=> '{memberCreator} deleted the {attachment} attachment from {card}',
		'action_delete_attachment_from_card@card'
			=> '{memberCreator} deleted the {attachment} attachment from this card',
		'action_delete_card'
			=> '{memberCreator} deleted card #{idCard} from {list}',
		'action_delete_custom_field'
			=> '{memberCreator} deleted the {customField} custom field from {board}',
		'action_delete_custom_field@board'
			=> '{memberCreator} deleted the {customField} custom field from this board',
		'action_deleted_account'
			=> '[deleted account]',
		'action_deleted_an_invitation_to_board'
			=> '{memberCreator} deleted an invitation to {board}',
		'action_deleted_an_invitation_to_board@board'
			=> '{memberCreator} deleted an invitation to this board',
		'action_deleted_an_invitation_to_organization'
			=> '{memberCreator} deleted an invitation to {organization}',
		'action_deleted_checkitem'
			=> '{memberCreator} deleted task {checkitem} on {checklist}',
		'action_disabled_calendar_feed'
			=> '{memberCreator} disabled the iCalendar feed on {board}',
		'action_disabled_calendar_feed@board'
			=> '{memberCreator} disabled the iCalendar feed on this board',
		'action_disabled_card_covers'
			=> '{memberCreator} disabled card cover images on {board}',
		'action_disabled_card_covers@board'
			=> '{memberCreator} disabled card cover images on this board',
		'action_disabled_commenting'
			=> '{memberCreator} disabled commenting on {board}',
		'action_disabled_commenting@board'
			=> '{memberCreator} disabled commenting on this board',
		'action_disabled_inviting'
			=> '{memberCreator} disabled inviting on {board}',
		'action_disabled_inviting@board'
			=> '{memberCreator} disabled inviting on this board',
		'action_disabled_plugin'
			=> '{memberCreator} disabled the {plugin} Power-Up',
		'action_disabled_powerup'
			=> '{memberCreator} disabled the {powerup} Power-Up',
		'action_disabled_self_join'
			=> '{memberCreator} disabled self join on {board}',
		'action_disabled_self_join@board'
			=> '{memberCreator} disabled self join on this board',
		'action_disabled_voting'
			=> '{memberCreator} disabled voting on {board}',
		'action_disabled_voting@board'
			=> '{memberCreator} disabled voting on this board',
		'action_due_date_change'
			=> '{memberCreator}',
		'action_email_card'
			=> '{memberCreator} emailed {card} to {list}',
		'action_email_card@card'
			=> '{memberCreator} emailed this card to {list}',
		'action_email_card_from'
			=> '{memberCreator} emailed {card} to {list} from {from}',
		'action_email_card_from@card'
			=> '{memberCreator} emailed this card to {list} from {from}',
		'action_enabled_calendar_feed'
			=> '{memberCreator} enabled the iCalendar feed on {board}',
		'action_enabled_calendar_feed@board'
			=> '{memberCreator} enabled the iCalendar feed on this board',
		'action_enabled_card_covers'
			=> '{memberCreator} enabled card cover images on {board}',
		'action_enabled_card_covers@board'
			=> '{memberCreator} enabled card cover images on this board',
		'action_enabled_plugin'
			=> '{memberCreator} enabled the {plugin} Power-Up',
		'action_enabled_powerup'
			=> '{memberCreator} enabled the {powerup} Power-Up',
		'action_enabled_self_join'
			=> '{memberCreator} enabled self join on {board}',
		'action_enabled_self_join@board'
			=> '{memberCreator} enabled self join on this board',
		'action_hid_board'
			=> '{memberCreator} hid {board}',
		'action_hid_board@board'
			=> '{memberCreator} hid this board',
		'action_invited_an_unconfirmed_member_to_board'
			=> '{memberCreator} invited an unconfirmed member to {board}',
		'action_invited_an_unconfirmed_member_to_board@board'
			=> '{memberCreator} invited an unconfirmed member to this board',
		'action_invited_an_unconfirmed_member_to_organization'
			=> '{memberCreator} invited an unconfirmed member to {organization}',
		'action_joined_board'
			=> '{memberCreator} joined {board}',
		'action_joined_board@board'
			=> '{memberCreator} joined this board',
		'action_joined_board_by_invitation_link'
			=> '{memberCreator} joined {board} with an invitation link from {memberInviter}',
		'action_joined_board_by_invitation_link@board'
			=> '{memberCreator} joined this board with an invitation link from {memberInviter}',
		'action_joined_organization'
			=> '{memberCreator} joined {organization}',
		'action_joined_organization_by_invitation_link'
			=> '{memberCreator} joined {organization} with an invitation link from {memberInviter}',
		'action_left_board'
			=> '{memberCreator} left {board}',
		'action_left_board@board'
			=> '{memberCreator} left this board',
		'action_left_organization'
			=> '{memberCreator} left {organization}',
		'action_made_a_normal_user_in_organization'
			=> '{memberCreator} made {member} a normal user in {organization}',
		'action_made_a_normal_user_on'
			=> '{memberCreator} made {member} a normal user on {board}',
		'action_made_a_normal_user_on@board'
			=> '{memberCreator} made {member} a normal user on this board',
		'action_made_admin_of_board'
			=> '{memberCreator} made {member} an admin of {board}',
		'action_made_admin_of_board@board'
			=> '{memberCreator} made {member} an admin of this board',
		'action_made_an_admin_of_organization'
			=> '{memberCreator} made {member} an admin of {organization}',
		'action_made_commenting_on'
			=> '{memberCreator} made commenting on {board} available to {level}',
		'action_made_commenting_on@board'
			=> '{memberCreator} made commenting on this board available to {level}',
		'action_made_inviting_on'
			=> '{memberCreator} made inviting on {board} available to {level}',
		'action_made_inviting_on@board'
			=> '{memberCreator} made inviting on this board available to {level}',
		'action_made_observer_of_board'
			=> '{memberCreator} made {member} an observer of {board}',
		'action_made_observer_of_board@board'
			=> '{memberCreator} made {member} an observer of this board',
		'action_made_self_admin_of_board'
			=> '{memberCreator} made themselves an admin of {board}',
		'action_made_self_admin_of_board@board'
			=> '{memberCreator} made themselves an admin of this board',
		'action_made_self_observer_of_board'
			=> '{memberCreator} became an observer of {board}',
		'action_made_self_observer_of_board@board'
			=> '{memberCreator} became an observer of this board',
		'action_made_voting_on'
			=> '{memberCreator} made voting on {board} available to {level}',
		'action_made_voting_on@board'
			=> '{memberCreator} made voting on this board available to {level}',
		'action_marked_checkitem_incomplete'
			=> '{memberCreator} marked {checkitem} incomplete on {card}',
		'action_marked_checkitem_incomplete@card'
			=> '{memberCreator} marked {checkitem} incomplete on this card',
		'action_marked_the_due_date_complete'
			=> '{memberCreator} marked the due date on {card} complete',
		'action_marked_the_due_date_complete@card'
			=> '{memberCreator} marked the due date complete',
		'action_marked_the_due_date_incomplete'
			=> '{memberCreator} marked the due date on {card} incomplete',
		'action_marked_the_due_date_incomplete@card'
			=> '{memberCreator} marked the due date incomplete',
		'action_member_joined_card'
			=> '{memberCreator} joined {card}',
		'action_member_joined_card@card'
			=> '{memberCreator} joined this card',
		'action_member_left_card'
			=> '{memberCreator} left {card}',
		'action_member_left_card@card'
			=> '{memberCreator} left this card',
		'action_members_visibility'
			=> 'its members',
		'action_move_card_from_board'
			=> '{memberCreator} transferred {card} to {board}',
		'action_move_card_from_board@card'
			=> '{memberCreator} transferred this card to {board}',
		'action_move_card_from_list_to_list'
			=> '{memberCreator} moved {card} from {listBefore} to {listAfter}',
		'action_move_card_from_list_to_list@card'
			=> '{memberCreator} moved this card from {listBefore} to {listAfter}',
		'action_move_card_to_board'
			=> '{memberCreator} transferred {card} from {board}',
		'action_move_card_to_board@card'
			=> '{memberCreator} transferred this card from {board}',
		'action_move_list_from_board'
			=> '{memberCreator} transferred {list} to {board}',
		'action_move_list_to_board'
			=> '{memberCreator} transferred {list} from {board}',
		'action_moved_card_higher'
			=> '{memberCreator} moved {card} higher',
		'action_moved_card_higher@card'
			=> '{memberCreator} moved this card higher',
		'action_moved_card_lower'
			=> '{memberCreator} moved {card} lower',
		'action_moved_card_lower@card'
			=> '{memberCreator} moved this card lower',
		'action_moved_checkitem_higher'
			=> '{memberCreator} moved {checkitem} higher in the checklist {checklist}',
		'action_moved_checkitem_lower'
			=> '{memberCreator} moved {checkitem} higher in the checklist {checklist}',
		'action_moved_list_left'
			=> '{memberCreator} moved list {list} left on {board}',
		'action_moved_list_left@board'
			=> '{memberCreator} moved {list} left on this board',
		'action_moved_list_right'
			=> '{memberCreator} moved list {list} right on {board}',
		'action_moved_list_right@board'
			=> '{memberCreator} moved {list} right on this board',
		'action_observers_visibility'
			=> 'members and observers',
		'action_on'
			=> 'on',
		'action_org_visibility'
			=> 'members of its team',
		'action_public_visibility'
			=> 'the public',
		'action_remove_checklist_from_card'
			=> '{memberCreator} removed {checklist} from {card}',
		'action_remove_checklist_from_card@card'
			=> '{memberCreator} removed {checklist} from this card',
		'action_remove_from_organization_board'
			=> '{memberCreator} removed {board} from {organization}',
		'action_remove_from_organization_board@board'
			=> '{memberCreator} removed this board from {organization}',
		'action_remove_label_from_card'
			=> '{memberCreator} removed the {label} label from {card}',
		'action_remove_label_from_card@card'
			=> '{memberCreator} removed the {label} label from this card',
		'action_remove_organization_from_enterprise'
			=> '{memberCreator} removed team {organization} from the enterprise {enterprise}',
		'action_removed_a_due_date'
			=> '{memberCreator} removed the due date from {card}',
		'action_removed_a_due_date@card'
			=> '{memberCreator} removed the due date from this card',
		'action_removed_from_board'
			=> '{memberCreator} removed {member} from {board}',
		'action_removed_from_board@board'
			=> '{memberCreator} removed {member} from this board',
		'action_removed_member_from_card'
			=> '{memberCreator} removed {member} from {card}',
		'action_removed_member_from_card@card'
			=> '{memberCreator} removed {member} from this card',
		'action_removed_member_from_organization'
			=> '{memberCreator} removed {member} from {organization}',
		'action_removed_vote_for_card'
			=> '{memberCreator} removed vote for {card}',
		'action_removed_vote_for_card@card'
			=> '{memberCreator} removed vote for this card',
		'action_rename_custom_field'
			=> '{memberCreator} renamed the {customField} custom field on {board} (from {name})',
		'action_rename_custom_field@board'
			=> '{memberCreator} renamed the {customField} custom field on this board (from {name})',
		'action_renamed_card'
			=> '{memberCreator} renamed {card} (from {name})',
		'action_renamed_card@card'
			=> '{memberCreator} renamed this card (from {name})',
		'action_renamed_checkitem'
			=> '{memberCreator} renamed {checkitem} (from {name})',
		'action_renamed_checklist'
			=> '{memberCreator} renamed {checklist} (from {name})',
		'action_renamed_list'
			=> '{memberCreator} renamed list {list} (from {name})',
		'action_reopened_board'
			=> '{memberCreator} re-opened {board}',
		'action_reopened_board@board'
			=> '{memberCreator} re-opened this board',
		'action_sent_card_to_board'
			=> '{memberCreator} sent {card} to the board',
		'action_sent_card_to_board@card'
			=> '{memberCreator} sent this card to the board',
		'action_sent_list_to_board'
			=> '{memberCreator} sent list {list} to the board',
		'action_set_card_aging_mode_pirate'
			=> '{memberCreator} changed card aging to pirate mode',
		'action_set_card_aging_mode_regular'
			=> '{memberCreator} changed card aging to regular mode',
		'action_update_board_desc'
			=> '{memberCreator} changed description of {board}',
		'action_update_board_desc@board'
			=> '{memberCreator} changed description of this board',
		'action_update_board_name'
			=> '{memberCreator} renamed {board} (from {name})',
		'action_update_board_name@board'
			=> '{memberCreator} renamed this board (from {name})',
		'action_update_custom_field'
			=> '{memberCreator} updated the {customField} custom field on {board}',
		'action_update_custom_field@board'
			=> '{memberCreator} updated the {customField} custom field on this board',
		'action_update_custom_field_item'
			=> '{memberCreator} updated the value for the {customFieldItem} custom field on {card}',
		'action_update_custom_field_item@card'
			=> '{memberCreator} updated the value for the {customFieldItem} custom field on this card',
		'action_updated_their_bio'
			=> '{memberCreator} updated their bio',
		'action_updated_their_display_name'
			=> '{memberCreator} updated their display name',
		'action_updated_their_initials'
			=> '{memberCreator} updated their initials',
		'action_updated_their_username'
			=> '{memberCreator} updated their username',
		'action_vote_on_card'
			=> '{memberCreator} voted for {card}',
		'action_vote_on_card@card'
			=> '{memberCreator} voted for this card',
		'action_voting'
			=> 'voting',
		'action_withdraw_enterprise_join_request'
			=> '{memberCreator} withdrew a request to add team {organization} to the enterprise {enterprise}'
		);

	const REQUEST_ACTIONS_BOARDS = array(
		'addAttachmentToCard',
		'addChecklistToCard',
		'addMemberToCard',
		'commentCard',
		'copyCommentCard',
		'convertToCardFromCheckItem',
		'createCard',
		'copyCard',
		'deleteAttachmentFromCard',
		'emailCard',
		'moveCardFromBoard',
		'moveCardToBoard',
		'removeChecklistFromCard',
		'removeMemberFromCard',
		'updateCard:idList',
		'updateCard:closed',
		'updateCard:due',
		'updateCard:dueComplete',
		'updateCheckItemStateOnCard',
		'updateCustomFieldItem',
		'addMemberToBoard',
		'addToOrganizationBoard',
		'copyBoard',
		'createBoard',
		'createCustomField',
		'createList',
		'deleteCard',
		'deleteCustomField',
		'disablePlugin',
		'disablePowerUp',
		'enablePlugin',
		'enablePowerUp',
		'makeAdminOfBoard',
		'makeNormalMemberOfBoard',
		'makeObserverOfBoard',
		'moveListFromBoard',
		'moveListToBoard',
		'removeFromOrganizationBoard',
		'unconfirmedBoardInvitation',
		'unconfirmedOrganizationInvitation',
		'updateBoard',
		'updateCustomField',
		'updateList:closed'
	);

	const REQUEST_ACTIONS_CARDS = array(
		'addAttachmentToCard',
		'addChecklistToCard',
		'addMemberToCard',
		'commentCard',
		'copyCommentCard',
		'convertToCardFromCheckItem',
		'createCard',
		'copyCard',
		'deleteAttachmentFromCard',
		'emailCard',
		'moveCardFromBoard',
		'moveCardToBoard',
		'removeChecklistFromCard',
		'removeMemberFromCard',
		'updateCard:idList',
		'updateCard:closed',
		'updateCard:due',
		'updateCard:dueComplete',
		'updateCheckItemStateOnCard',
		'updateCustomFieldItem'
	);

	private $feedName = '';
	private $feedURI = '';

	private function queryAPI($path, $params = array()) {
		$data = json_decode(getContents('https://trello.com/1/'
			. $path
			. '?'
			. http_build_query($params)))
			or returnServerError('Failed to query trello API');
		return $data;
	}

	private function renderAction($action, $textOnly = false) {
		if(!array_key_exists($action->display->translationKey, self::ACTION_TEXTS)) {
			return '';
		}

		$strings = array();
		$entities = (array)$action->display->entities;

		foreach($entities as $entity_name => $entity) {
			$type = $entity->type;
			if($type === 'attachmentPreview'
				&& !$textOnly
				&& isset($entity->originalUrl)) {
				$string = '<p><a href="'
					. $entity->originalUrl
					. '"><img src="'
					. $entity->previewUrl
					. '"></a></p>';
			} elseif($type === 'card' && !$textOnly) {
				$string = '<a href="https://trello.com/c/'
					. $entity->shortLink
					. '">'
					. $entity->text
					. '</a>';
			} elseif($type === 'member' && !$textOnly) {
				$string = '<a href="https://trello.com/'
					. $entity->username
					. '">'
					. $entity->text
					. '</a>';
			} elseif($type === 'date') {
				$string = gmdate('M j, Y \a\t g:i A T', strtotime($entity->date));
			} elseif($type === 'translatable') {
				$string = self::ACTION_TEXTS[$entity->translationKey];
			} else {
				if(isset($entity->text)) {
					$string = $entity->text;
				} else {
					$string = '';
				}
			}
			$strings['{' . $entity_name . '}'] = $string;
		}

		return str_replace(array_keys($strings),
			array_values($strings),
			self::ACTION_TEXTS[$action->display->translationKey]);
	}

	public function collectData() {
		$apiParams = array(
			'actions_display' => 'true',
			'fields' => 'name,url'
		);
		switch($this->queriedContext) {
		case 'Board':
			$apiParams['actions'] = implode(',', self::REQUEST_ACTIONS_BOARDS);
			$data = $this->queryAPI('boards/' . $this->getInput('b'), $apiParams);
			break;
		case 'Card':
			$apiParams['actions'] = implode(',', self::REQUEST_ACTIONS_CARDS);
			$data = $this->queryAPI('cards/' . $this->getInput('c'), $apiParams);
			break;
		default:
			returnClientError('Invalid context');
		}

		$this->feedName = $data->name;
		$this->feedURI = $data->url;

		foreach($data->actions as $action) {
			$item = array();

			$item['title'] = $this->renderAction($action, true);
			$item['timestamp'] = strtotime($action->date);
			$item['author'] = $action->memberCreator->fullName;
			$item['categories'] = array(
				'trello',
				$action->data->board->name,
				$action->type
			);
			if(isset($action->data->card)) {
				$item['categories'][] = $action->data->card->name;
				$item['uri'] = 'https://trello.com/c/'
					. $action->data->card->shortLink
					. '#action-'
					. $action->id;
			} else {
				$item['uri'] = 'https://trello.com/b/'
					. $action->data->board->shortLink;
			}
			$item['content'] = $this->renderAction($action, false);
			if(isset($action->data->attachment->url)) {
				$item['enclosures'] = array($action->data->attachment->url);
			}

			$this->items[] = $item;
		}
	}

	public function detectParameters($url) {
		$regex = '/^(https?:\/\/)?trello\.com\/([bc])\/([^\/?\n]+)/';
		if(preg_match($regex, $url, $matches) > 0) {
			return array($matches[2] => $matches[3]);
		} else {
			return null;
		}
	}

	public function getURI() {
		switch($this->queriedContext) {
		case 'Board':
		case 'Card':
			return $this->feedURI;
		default: return parent::getURI();
		}
	}

	public function getName() {
		switch($this->queriedContext) {
		case 'Board':
		case 'Card':
			return $this->feedName;
		default: return parent::getName();
		}
	}
}
