before adding plugin logic

package-lock.json

@@ -5763,9 +5763,9 @@
       "dev": true
     },
     "upgiter": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/upgiter/-/upgiter-1.0.1.tgz",
-      "integrity": "sha512-HHWZ4/SWXVXC80fnNW/E1gsNT8D5mlAG6i2JcGG9akr5Q+sDrt+NPbaeMuLMSJJY6LI0CiIbzE59duWEQQINJg==",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/upgiter/-/upgiter-1.0.4.tgz",
+      "integrity": "sha512-+6McoJqbKvEr32ixlX/+r+z7v2JTmoCooxvDPBm3kv2uWQ/s+XDVMgxR69QRDYrTyc1nTyqlNJ+fNVxfm2bDKw==",
       "requires": {
         "fs": "0.0.1-security",
         "git-describe": "^4.0.4",

package.json

@@ -42,7 +42,7 @@
     "spawn-sync": "^2.0.0",
     "sqlite3": "^4.1.0",
     "trash": "^6.0.0",
-    "upgiter": "^1.0.1",
+    "upgiter": "^1.0.4",
     "uuid": "^3.3.2"
   },
   "devDependencies": {

src/backend/Admin.ts

@@ -1,10 +1,9 @@
 'use strict'
 
 import { getLogger } from 'frontblock-generic/Types';
-import { ConfigLoader } from 'loadson';
-import { promises as fs } from "fs"
+import { promises as fs, mkdirSync } from "fs"
 import { RPCServer } from 'rpclibrary/js/src/Backend'
-import { AdminConf } from './Types';
+import { AdminConf, TableDefiniton } from './Types';
 import { RPCConfigLoader } from './RPCConfigLoader';
 
 import * as Path from 'path'
@@ -12,20 +11,47 @@ import * as Path from 'path'
 import Knex = require('knex');
 import http = require('http');
 import express = require('express');
+import { TableDefinitionExporter } from './Interfaces';
+import { FrontworkEventBus } from './Eventbus';
+import { Plugin } from './Plugin';
 
 const logger = getLogger("admin", 'debug') 
 
-export class FrontworkAdmin {
+export class FrontworkAdmin 
+implements TableDefinitionExporter {
+
     private express
     private httpServer
-    private config: RPCConfigLoader<AdminConf>
+    private eventBus:FrontworkEventBus = new FrontworkEventBus(this)
+    private plugins: Plugin[] = []
+    config: RPCConfigLoader<AdminConf>
+    knex:Knex
 
     constructor(){
+        this.eventBus = new FrontworkEventBus(this)
+    }
+
+    async start(){
         this.initConfig()
+        await this.makeKnex()
         this.startWebsocket()
         this.startWebserver()
     }
 
+    protected configChangeHandler = (conf:AdminConf, key?:string) => {
+        if(key === 'dbConf'){
+            this.makeKnex()
+        }
+    }
+
+    getConfigKey(key:string){
+        return this.config.getConfigKey(key)
+    }
+
+    setConfigKey(key:string, value:any){
+        return this.config.setConfigKey(key, value)
+    }
+
     private initConfig(){
         this.config = new RPCConfigLoader<AdminConf>({
             name: "FrontworkAdminConf", 
@@ -42,13 +68,13 @@ export class FrontworkAdmin {
                     }
                 }   
             }
-        }, './config', console.log) 
+        }, './config', this.configChangeHandler) 
     }
 
     private startWebsocket(){
-        console.log()
         new RPCServer(20000, [
-            this.config
+            this.config,
+            ...this.plugins
         ])
     }
 
@@ -108,6 +134,32 @@ export class FrontworkAdmin {
         logger.info("Webserver stopped")
     }
 
+    protected async makeKnex():Promise<Knex>{
+        const conf:Knex.Config = this.config.getConfigKey("dbConf")
+
+        logger.debug("Making new knex:", conf)        
+        if(conf.client === 'sqlite3'){
+            mkdirSync(Path.dirname((<any>conf.connection).filename), {recursive: true})
+        }
+
+        this.knex = Knex(conf)
+    
+        await Promise.all(this.getTableDefinitions().map(async (def)=>{
+            const hasTable = await this.knex.schema.hasTable(def.name)
+            if(!hasTable){
+                await this.knex.schema.createTable(def.name, def.tableBuilder)
+            }
+        }))
+        
+        return this.knex
+    }
+
+    getTableDefinitions(): TableDefiniton[]{
+        return [
+            this.eventBus,
+            ...this.plugins
+        ].flatMap(exporter => exporter.getTableDefinitions())
+    }
 }
 
 process.on( 'SIGINT', function() {

src/backend/Eventbus.ts

@@ -0,0 +1,60 @@
+import { RPCExporter } from "rpclibrary/js/src/Interfaces";
+import { SubscriptionResponse, ErrorResponse } from "rpclibrary/js/src/Types";
+import { makeSubResponse } from "rpclibrary/js/src/Utils";
+import { FrontworkAdmin } from "./Admin";
+import { TableDefinitionExporter } from "./Interfaces";
+
+export type NotificationSeverity = 'Info' | 'Important' | 'Error'
+
+export type Notification = { 
+    ID?:number, 
+    severity: NotificationSeverity, 
+    topic: string,
+    message:string,
+    time?: number
+}
+
+export type EventbusIfc = {
+    Eventbus: {
+        getNotificationLog: () => Promise<Notification[]>
+        pushNotification: (notification:Notification) => Promise<void>
+        subscribeNotifications: (callback:Function) => Promise<SubscriptionResponse | ErrorResponse>
+    }
+} 
+
+export class FrontworkEventBus 
+implements RPCExporter<EventbusIfc, "Eventbus">, TableDefinitionExporter {
+    name = "Eventbus" as "Eventbus" 
+    
+    constructor(private admin: FrontworkAdmin){
+        this.admin
+    }
+
+    exportRPCs(){
+        return [{
+            name: 'getNotificationLog' as 'getNotificationLog',
+            call: async () => []
+        },{
+            name: 'pushNotification' as 'pushNotification',
+            call: async () => {}
+        },{
+            name: 'subscribeNotificaitons' as 'subscribeNotifications',
+            hook: async (callback: Function) => {
+                return makeSubResponse({})
+            }
+        }]
+    }
+
+    getTableDefinitions(){
+        return [{
+            name: 'notifications',
+            tableBuilder: (table) => {
+                table.increments('ID');
+                table.string('severity');
+                table.string('topic');
+                table.string('message');
+                table.timestamp('time');
+            }
+        }]
+    }
+}

src/backend/Interfaces.ts

@@ -0,0 +1,5 @@
+import { TableDefiniton } from "./Types";
+
+export interface TableDefinitionExporter{
+    getTableDefinitions(): TableDefiniton[]
+}

src/backend/Plugin.ts

@@ -0,0 +1,22 @@
+import { FrontworkAdmin } from "./Admin"
+import { RPC } from "rpclibrary/js/src/Types"
+import { TableDefiniton } from "./Types"
+import { RPCExporter } from "rpclibrary/js/src/Interfaces"
+import { TableDefinitionExporter } from "./Interfaces"
+import { ConfigExporter } from "loadson"
+
+export abstract class Plugin<ConfType = {}> 
+implements ConfigExporter<ConfType>, RPCExporter<any,any,any>, TableDefinitionExporter{
+    
+    constructor (protected admin: FrontworkAdmin, public name:string){
+        if(!this.getConfig()){
+            this.setConfig(this.getDefaultConfig())
+        }
+    }
+    public setConfig = (conf:ConfType) => this.admin.setConfigKey(this.name, conf) 
+    public getConfig = () => this.admin.getConfigKey(this.name) 
+
+    abstract getTableDefinitions(): TableDefiniton[]
+    abstract getDefaultConfig(): ConfType
+    abstract exportRPCs(): RPC<any,any>[]
+}

src/backend/PluginLoader.ts

@@ -0,0 +1,19 @@
+import { RPCExporter } from "rpclibrary/js/src/Interfaces";
+import { Git, Types } from "upgiter"
+
+export type GitUpdaterIfc = {
+    cloneRepo: (force:boolean) => Promise<Types.FolderStatus>
+    getStatus: () => Promise<Types.FolderStatus>
+    checkoutTag: (tag:string) => Promise<Types.FolderStatus>
+    isOutdated: () => Promise<boolean> 
+}
+
+class RPCUpgiter
+extends Git.Updater
+implements RPCExporter<any, "PluginLoader">{
+    name = "PluginLoader" as "PluginLoader";
+
+    exportRPCs(){
+        return []
+    }
+}

src/backend/Types.ts

@@ -6,4 +6,9 @@ export type AdminConf = {
     httpPort: number,
     dbConf:Knex.Config, 
     eventBusConf: { [topic in string]: NotificationSeverity}
+}
+
+export type TableDefiniton = {
+    name: string, 
+    tableBuilder: (table: Knex.CreateTableBuilder) => void
 }