Add VersionedModel base and version page changes

app/models/VersionedModel.js

@@ -0,0 +1,46 @@
+const Model = require('flitter-orm/src/model/Model');
+const uuid = require('uuid/v4');
+
+class VersionedModel extends Model {
+    static get schema() {
+        return {
+            version_archive: [Object],
+            version_num: { type: Number, default: 1 },
+            version_create_date: { type: Date, default: () => new Date },
+        }
+    }
+
+    async version_save(message = undefined) {
+        await this.new_version(message)
+        return this.save()
+    }
+
+    async new_version(message = undefined) {
+        const version_data = await this.cast_to_version_data()
+        version_data.version_UUID = uuid()
+        version_data.version_message = message
+
+        if ( !this.version_num ) this.version_num = 1
+        if ( !this.version_archive ) this.version_archive = []
+
+        this.version_num += 1
+        this.version_archive.push(version_data)
+        this.version_create_date = new Date()
+    }
+
+    async cast_to_version_data() {
+        const schema = this.constructor.__schema
+        const shallow_object = {}
+        for ( const prop in schema.schema ) {
+            if ( prop in this ) {
+                shallow_object[prop] = this[prop]
+            }
+        }
+
+        const data = await this.__scope_limit_save(schema.cast_to_schema(shallow_object))
+        delete data.version_archive
+        return data
+    }
+}
+
+module.exports = exports = VersionedModel

app/models/api/Page.model.js

@@ -1,6 +1,6 @@
-const Model = require("flitter-orm/src/model/Model");
-const { ObjectId } = require("mongodb");
-const uuid = require('uuid/v4');
+const VersionedModel = require('../VersionedModel')
+const { ObjectId } = require('mongodb')
+const uuid = require('uuid/v4')
 
 const ActiveScope = require('../scopes/Active.scope')
 
@@ -9,13 +9,14 @@ const ActiveScope = require('../scopes/Active.scope')
  * -------------------------------------------------------------
  * Put some description here!
  */
-class Page extends Model {
+class Page extends VersionedModel {
 	static get services() {
-		return [...super.services, "models"];
+		return [...super.services, 'models'];
 	}
 	static get schema() {
 		// Return a flitter-orm schema here.
 		return {
+			...super.schema,
 			UUID: {type: String, default: () => uuid()},
 			Name: String,
 			OrgUserId: ObjectId,
@@ -201,7 +202,8 @@ class Page extends Model {
 		// Add the user to the appropriate access list
 		this[`shared_users_${level}`].push(user._id)
 
-		await this.save()
+		// TODO replace user.uid with name of user when we support that
+		await this.version_save(`Shared with ${user.uid} (${level} access)`)
 		await user.save()
 	}
 
@@ -217,7 +219,7 @@ class Page extends Model {
 		this.shared_users_update = this.shared_users_update.filter(x => String(x) !== user.id)
 		this.shared_users_manage = this.shared_users_manage.filter(x => String(x) !== user.id)
 
-		await this.save()
+		await this.version_save(`Unshared with ${user.uid}`)
 		await user.save()
 	}