ZipFileExporter.js

/**
 * This script requires jszip.js
 *
 * @author Ikaros Kappler
 * @date 2013-09-05
 * @version 1.0.0
 **/

ZipFileExporter = {

    _build_export_data: function() {

	    // Build a geometry-array
	//var geoms = [];
	//var meshes = getPreviewMeshes();
	//	for( var i = 0; i < meshes.length; i++ ) {
	//geoms[i] = meshes[i].geometry;
	//}
	
	var msh = getPreviewMeshes();

	return { 
	    //geometry:          getPreviewMesh().geometry,
	    meshes:              msh,
	    bezierPath:          getBezierPath(),
	    meshSettings:      {
		shapeSegments:        document.forms[ "mesh_form" ].elements[ "shape_segments" ].value,
		pathSegments:         document.forms[ "mesh_form" ].elements[ "path_segments" ].value,
		bendAngle:            document.forms[ "mesh_form" ].elements[ "preview_bend" ].value,
		buildNegativeMesh:    document.forms[ "mesh_form" ].elements[ "build_negative_mesh" ].checked,
		meshHullStrength:     document.forms[ "mesh_form" ].elements[ "mesh_hull_strength" ].value,
		closePathBegin:       document.forms[ "mesh_form" ].elements[ "mesh_close_path_begin" ].checked,
		closePathEnd:         document.forms[ "mesh_form" ].elements[ "mesh_close_path_end" ].checked,
		wireframe:            document.forms[ "mesh_form" ].elements[ "wireframe" ].checked,
		triangulate:          document.forms[ "mesh_form" ].elements[ "triangulate" ].checked,
		
		// This is new since 2013-09-16
		splitShape:           document.forms[ "mesh_form" ].elements[ "split_shape" ].checked,

		// This is new since 2013-10-30
		arrangeSplitsOnPlane: document.forms[ "mesh_form" ].elements[ "arrange_splits_on_plane" ].checked,
		
		// These are new since 2014-04-23
		directions:           getSelectedMeshDirection(),  // "xyz" or "zxy"
		meshHullType:         getSelectedMeshHullType(),   // "perpendicular" or "prism"
		
		// This is new since 2014-04-25
		parts:                getSelectedMeshParts()       // "both" or "left" or "right"
	    },

	    // This is new since 2014-04-23
	    colorSettings:  {
		meshColor:            document.forms["color_form"].elements["color"].value
	    },

	    compress:          (document.forms[ "zip_form" ].elements[ "compress_zip" ].value!="0")
	}; // END object
    }, // END function


    /**
     * data must be an object with the members
     *  - geometries (a THREE.js geometry array)
     *  - bezierPath
     *  - meshSettings { shapeSegments, 
     *                   pathSegments, 
     *                   bendAngle, 
     *                   buildNegativeMesh, 
     *                   meshHullStrength, 
     *                   closePathBegin, 
     *                   closePathEnd, 
     *                   wireframe, 
     *                   triangulate,
     *                   splitShape } 
     **/
    exportZipFile: function( filename, data ) {

	// Data passed?
	data = data || ZipFileExporter._build_export_data();

	var zip = new JSZip();
	
	// Remember: btoa() converts string data to base64, 
	//           atob() converts base64 data to string.


	var exportSTLFile = false; // Too large!
	if( exportSTLFile ) {
	    for( var i = 0; i < data.meshes.length; i++ ) {
		// Add STL model to zip
		var stlData = STLBuilder.buildSTL( data.meshes[i].geometry );
		zip.file( "model_" + i + ".stl",
			  stlData,
			  { base64: false,
			    binary: false,
			    type: "application/sla"
			  }
			);
	    } // END for
	} // END if
	
	// Add bezier path (JSON) to zip
	var bezierJSON = data.bezierPath.toJSON( true );
	//window.alert( bezierJSON );
	zip.file( "shape.bezierpath.json",
		  bezierJSON,
		  { base64: false,
		    binary: false,
		    type: "application/json"
		  }
		);

	// Add mesh settings (JSON) to zip
	var meshSettingsJSON = JSON.stringify( data.meshSettings, null, "\t" );
	//window.alert( meshSettingsJSON );
	zip.file( "mesh_settings.json",
		  meshSettingsJSON,
		  { base64: false,
		    binary: false,
		    type: "application/json"
		  }
		);


	// Add color settings (JSON) to zip
	var colorSettingsJSON = JSON.stringify( data.colorSettings, null, "\t" );
	//window.alert( meshSettingsJSON );
	zip.file( "color_settings.json",
		  colorSettingsJSON,
		  { base64: false,
		    binary: false,
		    type: "application/json"
		  }
		);
	

        // The generate-function returns a base64 string
	var zipData = zip.generate( { type: "base64", 
				      compression: ( data.compress ? "DEFLATE" : "STORE" )
				    } ); 
	//window.alert( "zipData=" + zipData );

	// This is one possibilty to send binary data: base64-encoded
	// inside the window location. 
	// Problem 1: this does not support a preset download file name!
	// Problem 2: what about the location max length constraint???
	//location.href="data:application/zip;base64,"+zipData;
	
	// This is a better way:
	//  use the browser built-in saveAs function.
	var uintArray = Base64Binary.decode(zipData);  
	var blob = new Blob( [uintArray], // [atob(zipData)], 
			     {type: "application/zip"}
			   );
	window.saveAs(blob, filename);

    } // END function

} // END ZipFileExporter