MediaWiki:SwissAccess.js

// License: GPL

console.log("Loading SwissAccess.js")


var controller_item_id = 991;

var wbEStruct = {
		instanceOfRelations: 'claims.P3', // location of P3 relations in wbEntity
		IDPropLoc:	'mainsnak.datavalue.value', // location of ID properties in related entity
		IDName:		'numeric-id' // ID property name which checked 
				}; 

mw.hook( 'wikibase.entityPage.entityLoaded' ).add( function ( entity ) {
      'use strict';
      // Your code goes here
      // console.log( entity );
// check if we are on a page of a loaded Entity
if ( typeof entity !=  "undefined" ) {
	// get wbEntity as json
	var obj = entity ;
	// console.log( "parsed object", obj )
	// check if we have P3 relations and iterate through
	if ( typeof check( obj, wbEStruct["instanceOfRelations"] ) != "undefined" ) {
		// console.log( "object has 'instance of' relations" );
		for( var i = 0; i < dive( obj, wbEStruct["instanceOfRelations"] ).length; i++ ) {
			// console.log("dived in");		
			// check if we have controller id constructed from wbEntity 
			if( dive( dive( obj, wbEStruct["instanceOfRelations"])[i] , wbEStruct["IDPropLoc"])[wbEStruct["IDName"]] === controller_item_id ) {
				// console.log( "it's a controller" )		
				var $title2 = $( '.wikibase-title' ),
				qId = $title2.find( '.wikibase-title-id' ).text().replace( /[()]/g, '' );
				var api = new mw.Api();
				api.get( {
				    action: 'expandtemplates',
				    text: '{{MailtoSwissAccess|'+qId+'}}'
				} ).done( function ( data ) {
				    mw.notify( $('<a href="'+data.expandtemplates["*"]+'"> Do a SAR to this controller, under Swiss law!</a>') , { autoHide: false } );
				} );
			}
		}
	}
	// Else let's do nothing;
}
  } );

// helper function for diving into a part of array
function indexinterpolate(obj,i) { return  (obj[i] != undefined) ? obj[i] : obj}; 

// helper function for checking a part of an array exists
function indexcheck(obj,i) {  return  (obj[i] != undefined) ? obj[i] : undefined };

function dive(array, read){
	return read.split('.').reduce(indexinterpolate, array);
}

function check(array, read){
        return read.split('.').reduce(indexcheck, array);
}