Create osmChangeset object, inherit from osmEntity

modules/osm/changeset.js

@@ -0,0 +1,53 @@
+import _ from 'lodash';
+import { osmEntity } from './entity';
+import { geoExtent } from '../geo';
+
+
+export function osmChangeset() {
+    if (!(this instanceof osmChangeset)) {
+        return (new osmChangeset()).initialize(arguments);
+    } else if (arguments.length) {
+        this.initialize(arguments);
+    }
+}
+
+
+osmEntity.changeset = osmChangeset;
+
+osmChangeset.prototype = Object.create(osmEntity.prototype);
+
+_.extend(osmChangeset.prototype, {
+
+    type: 'changeset',
+
+
+    extent: function() {
+        return new geoExtent();
+    },
+
+
+    geometry: function() {
+        return 'changeset';
+    },
+
+
+    asJXON: function() {
+        return {
+            osm: {
+                changeset: {
+                    tag: _.map(this.tags, function(value, key) {
+                        return { '@k': key, '@v': value };
+                    }),
+                    '@version': 0.6,
+                    '@generator': 'iD'
+                }
+            }
+        };
+    },
+
+
+    asGeoJSON: function() {
+        return {};
+    }
+
+});

modules/osm/entity.js

@@ -26,7 +26,7 @@ osmEntity.id = function(type) {
 
 
 osmEntity.id.next = {
-    node: -1, way: -1, relation: -1
+    changeset: -1, node: -1, way: -1, relation: -1
 };
 
 
@@ -41,7 +41,7 @@ osmEntity.id.toOSM = function(id) {
 
 
 osmEntity.id.type = function(id) {
-    return { 'n': 'node', 'w': 'way', 'r': 'relation' }[id[0]];
+    return { 'c': 'changeset', 'n': 'node', 'w': 'way', 'r': 'relation' }[id[0]];
 };
 
 

modules/osm/index.js

@@ -1,3 +1,4 @@
+export { osmChangeset } from './changeset';
 export { osmEntity } from './entity';
 export { osmNode } from './node';
 export { osmRelation } from './relation';

test/index.html

@@ -81,6 +81,7 @@
 
     <script src='spec/modes/add_point.js'></script>
 
+    <script src='spec/osm/changeset.js'></script>
     <script src='spec/osm/entity.js'></script>
     <script src='spec/osm/intersection.js'></script>
     <script src='spec/osm/multipolygon.js'></script>

test/spec/osm/changeset.js

@@ -0,0 +1,29 @@
+describe('iD.osmChangeset', function () {
+    it('returns a changeset', function () {
+        expect(iD.osmChangeset()).to.be.an.instanceOf(iD.osmChangeset);
+        expect(iD.osmChangeset().type).to.equal('changeset');
+    });
+
+    it('defaults tags to an empty object', function () {
+        expect(iD.osmChangeset().tags).to.eql({});
+    });
+
+    it('sets tags as specified', function () {
+        expect(iD.osmChangeset({tags: {foo: 'bar'}}).tags).to.eql({foo: 'bar'});
+    });
+
+    describe('#asJXON', function () {
+        it('converts a node to jxon', function() {
+            var node = iD.osmChangeset({tags: {'comment': 'hello'}});
+            expect(node.asJXON()).to.eql({
+                osm: {
+                    changeset: {
+                        tag: [{ '@k': 'comment', '@v': 'hello' }],
+                        '@version': 0.6,
+                        '@generator': 'iD'
+                    }
+                }
+            });
+        });
+    });
+});