Initial commit of the qmk keymap generator

lib/KeyMap.ts

@@ -0,0 +1,50 @@
+import { ILayer, ILayers } from './Layer';
+
+export interface IKeyMap extends IterableIterator<ILayer> {
+  layers: ILayers;
+  [index: number]: ILayer;
+}
+
+export class KeyMap implements IKeyMap {
+  layers: ILayers = [];
+  index: number = 0;
+
+  constructor(layers: ILayers) {
+    this.layers = layers;
+    this.index = 0;
+  }
+
+  [index: number]: ILayer;
+
+  forEach(fn: (k: ILayer, i: number) => any): void {
+    return this.layers.forEach(fn);
+  }
+
+  map(fn: (k: ILayer, i: number) => ILayer): ILayers {
+    return this.layers.map(fn);
+  }
+
+  get length(): number {
+    return this.layers.length;
+  }
+
+  public next(): IteratorResult<ILayer> {
+    if (this.index < this.layers.length) {
+      return {
+        done: false,
+        value: this.layers[this.index++],
+      };
+    }
+    return {
+      done: true,
+      value: null,
+    };
+  }
+
+  [Symbol.iterator](): IterableIterator<ILayer> {
+    return this;
+  }
+}
+
+export const keymap = (...layers: ILayers): IKeyMap => new KeyMap(layers);
+export default keymap;