Rectangles Ovals Polygons

###rectangles, ovals and polygons

    /**
     * Rectangles ovals polygons    
     */
    
    main();
    
    function main(){
    var pw = 170; // for better handling
    var ph = pw/3; // also 
    
    // make a document
    var doc = app.documents.add({
        documentPreferences:{
            pageWidth:pw,
            pageHeight:ph
            }
        });
    
    // there is already a page
    var page = doc.pages[0];
    // some variables for calculating positions
    // of our objects
    var step = (pw/3);
    var gutter = 10;
    var y1 = gutter;
    var x1 = gutter;
    var y2 = (ph - gutter);
    var x2 = (step - gutter);
    
    // make a rectangle
    var rect = page.rectangles.add({geometricBounds:[y1,x1,y2,x2]});
    // move to the right
    x1 += step;
    x2 = x2 + step ;
    // make an oval
    var oval = page.ovals.add({geometricBounds:[y1,x1,y2,x2]});
    // move again
    x1 += step;
    x2 = x2 + step;
    // make a polygon
    var poly = page.polygons.add({geometricBounds:[y1,x1,y2,x2]});
    // now we throw tem in an array
    var items = [rect,oval,poly];
    
    // load 3 images
    var images = File.openDialog("Select at least "+items.length+" images","*.*",true);
    // this is an object to encapsulate all the 
    // communication with the user
    var comunication = messages(images.length, items.length);
    // if the images dont fit the number of objects
    // stop the function
    if(images.length < items.length){
        comunication.wrong_num();
        return;
        }else if(images.length == items.length){
        comunication.right_num();
        }else if (images.length > items.length){
        comunication.check_diff();
    }
    // loop our aray and do some stuff
    // the objects in the array have some
    // (seems like all) properties
    // in common.
    
    for(var i in items){
        thing = items[i]; // isolate it we dont know what it is
        thing.strokeWeight = 0; // set to no stroke
        thing.place(images[i]); // place one of the images
        thing.fit(FitOptions.CENTER_CONTENT); // fit it
        thing.fit(FitOptions.FILL_PROPORTIONALLY); // fit it
        // you can find out what kind of object
        // you have by checking like this
        if(thing instanceof Rectangle){
            alert("I'm an "+ thing.constructor.name +". at index " + i + "");
            thing.bottomLeftCornerOption = CornerOptions.ROUNDED_CORNER;
            }; // close if
        }; // close loop
    
    return 0;
    }; // close main function
    
    
    
    /**
     *  This function does some communication based on a numbers
     *  Just for fun ;)
     *
     */
    function messages(images_len,items_len){
        var diff = images_len - items_len;
        var obj = { 
                    "images_len":images_len,
                    "items_len":items_len,
                    "diff":diff,
                    /* the message if it is the right num*/
                    "right_num":function (){
                        alert("Well done. This is the right amount of images.\n"+
                    "Sing with me: '"+ items_len + "' is the magic number!\n" +
                    "Yes t is my friend - It's the magic number...");
                    },
                    /* the message if it is not enough */
                    "wrong_num":function(){
                        alert("You need more images.\nTry again.");
                        },
                    /* if there are to many images do some talking */
                    "one":"Hm. There is "+ diff+ " image more.\n",
                    "multi": "Hm. There are "+ diff + " images more.\n",
                    "end":"I will only use "+ items_len + " of them.",
                    "build": function(bool){
                             if(bool == true){
                                 return this.one + this.end;
                                 }else{
                                 return this.multi + this.end;
                             }
                         }/* close conditional*/,
                        /*now the function that gets called */
                        "check_diff":function(){
                                if(diff == 1){
                                alert(this.build(true));
                                }else{
                                alert(this.build(false));
                                }
                            }
                        }/* close build function in object. IMPORTANT dont add an ";" */
                    ; /* Close the obj objecct */
                return obj;
                }