add commands to extension manager

packages/core/index.ts

@@ -1,7 +1,7 @@
-import { Editor } from './src/Editor'
+import { Editor, CommandSpec } from './src/Editor'
 
 export default Editor
-export { Editor }
+export { Editor, CommandSpec }
 export { default as Extension } from './src/Extension'
 export { default as Node } from './src/Node'
 export { default as Mark } from './src/Mark'

packages/core/src/Editor.ts

@@ -21,7 +21,10 @@ import Node from './Node'
 import EventEmitter from './EventEmitter'
 
 type EditorContent = string | JSON | null
-type Command = (next: Function, editor: Editor, ...args: any) => any
+export type Command = (next: Function, editor: Editor, ...args: any) => any
+export interface CommandSpec {
+  [key: string]: Command
+}
 
 interface Options {
   content: EditorContent

packages/core/src/Extension.ts

@@ -41,6 +41,10 @@ export default abstract class Extension {
 
   keys(): { [key: string]: any } {
     return {}
+  }
+
+  commands(): { [key: string]: any } {
+    return {}
   } 
 
 }

packages/core/src/ExtensionManager.ts

@@ -1,7 +1,7 @@
 import collect from 'collect.js'
 import { keymap } from 'prosemirror-keymap'
 import { inputRules } from 'prosemirror-inputrules'
-import { Editor } from './Editor'
+import { Editor, CommandSpec } from './Editor'
 import Extension from './Extension'
 import Node from './Node'
 
@@ -16,11 +16,20 @@ export default class ExtensionManager {
     this.extensions.forEach(extension => {
       extension.bindEditor(editor)
       editor.on('schemaCreated', () => {
+        this.registerCommands(extension.commands())
         extension.created()
       })
     })
   }
 
+  registerCommands(commands: CommandSpec) {
+    Object
+      .entries(commands)
+      .forEach(([name, command]) => {
+        this.editor.registerCommand(name, command)
+      })
+  }
+
   get topNode() {
     const topNode = collect(this.extensions).firstWhere('topNode', true)