Add FOLD.convert.toJSON

dist/fold.js

@@ -220,6 +220,27 @@ convert.faces_vertices_to_edges = function(mesh) {
   return mesh;
 };
 
+convert.toJSON = function(fold) {
+  var key, obj, value;
+  return "{\n" + ((function() {
+    var results;
+    results = [];
+    for (key in fold) {
+      value = fold[key];
+      results.push(("  " + (JSON.stringify(key)) + ": ") + (Array.isArray(value) ? "[\n" + ((function() {
+        var j, len, results1;
+        results1 = [];
+        for (j = 0, len = value.length; j < len; j++) {
+          obj = value[j];
+          results1.push("    " + (JSON.stringify(obj)));
+        }
+        return results1;
+      })()).join(',\n') + "\n  ]" : JSON.stringify(value)));
+    }
+    return results;
+  })()).join(',\n') + "\n}\n";
+};
+
 convert.extensions = {};
 
 convert.converters = {};

doc/api.md

@@ -76,6 +76,8 @@ for details.
 
 File format conversion (supported formats are `"fold"` and `"opx"`):
 
+* `FOLD.convert.toJSON(fold)`:
+  Given a FOLD object, convert into a nicely formatted JSON string.
 * `FOLD.convert.convertFromTo(data, fromFormat, toFormat)`: Convert the
   specified data from one format to another.
 * `FOLD.convert.convertFrom(data, fromFormat)`: Convert the specified data

package.json

@@ -1,6 +1,6 @@
 {
   "name": "fold",
-  "version": "0.10.1",
+  "version": "0.10.2",
   "description": "FOLD file format for origami models, crease patterns, etc.",
   "main": "lib/index.js",
   "bin": {

src/convert.coffee

@@ -122,6 +122,20 @@ convert.faces_vertices_to_edges = (mesh) ->
     )
   mesh
 
+convert.toJSON = (fold) ->
+  ## Convert FOLD object into nicely formatted JSON
+  "{\n" +
+  (for key, value of fold
+    "  #{JSON.stringify key}: " +
+    if Array.isArray value
+      "[\n" +
+      ("    #{JSON.stringify(obj)}" for obj in value).join(',\n') +
+      "\n  ]"
+    else
+      JSON.stringify value
+  ).join(',\n') +
+  "\n}\n"
+
 convert.extensions = {}
 convert.converters = {}
 convert.getConverter = (fromExt, toExt) ->

src/file.coffee

@@ -30,7 +30,7 @@ file.toFile = (fold, output, converter = null) ->
       return
   result = converter fold
   if typeof result != 'string'
-    result = JSON.stringify result, null, 1
+    result = convert.toJSON result
   fs.writeFileSync output, result, 'utf-8'
 
 file.fileToFile = (input, output, converter = null) ->
@@ -59,7 +59,7 @@ file.fileToFile = (input, output, converter = null) ->
     console.log input, '->', output
     result = converter fs.readFileSync input, 'utf-8'
     if typeof result != 'string'
-      result = JSON.stringify result, null, 1
+      result = convert.toJSON result
     fs.writeFileSync output, result, 'utf-8'
 
 file.main = (args = process.argv[2..]) ->