From 3649dff9aa14bd2f9e4ab4253d14561cc3d6e1c2 Mon Sep 17 00:00:00 2001
From: KernelDeimos <eric.alex.dube@gmail.com>
Date: Mon, 28 Oct 2024 15:09:26 -0400
Subject: [PATCH] dev: add module lib installation to useapi

---
 src/backend/src/CoreModule.js | 11 +++++--
 src/backend/src/Kernel.js     | 61 ++++++++++++++++++++++++++++++++---
 2 files changed, 66 insertions(+), 6 deletions(-)

diff --git a/src/backend/src/CoreModule.js b/src/backend/src/CoreModule.js
index b54c8d11..52d5cd01 100644
--- a/src/backend/src/CoreModule.js
+++ b/src/backend/src/CoreModule.js
@@ -24,11 +24,13 @@ const { Context } = require('./util/context');
 
 
 class CoreModule extends AdvancedBase {
+    dirname () { return __dirname; }
     async install (context) {
         const services = context.get('services');
         const app = context.get('app');
         const useapi = context.get('useapi');
-        await install({ services, app, useapi });
+        const modapi = context.get('modapi');
+        await install({ services, app, useapi, modapi });
     }
 
     // Some services were created before the BaseService
@@ -44,7 +46,10 @@ class CoreModule extends AdvancedBase {
 
 module.exports = CoreModule;
 
-const install = async ({ services, app, useapi }) => {
+/**
+ * @footgun - real install method is defined above
+ */
+const install = async ({ services, app, useapi, modapi }) => {
     const config = require('./config');
 
     useapi.withuse(() => {
@@ -63,6 +68,8 @@ const install = async ({ services, app, useapi }) => {
         const LibTypeTagged = require('./libraries/LibTypeTagged');
         services.registerService('lib-type-tagged', LibTypeTagged);
     });
+
+    modapi.libdir('lib.core', './util');
     
     // === SERVICES ===
 
diff --git a/src/backend/src/Kernel.js b/src/backend/src/Kernel.js
index d5028d48..881b922e 100644
--- a/src/backend/src/Kernel.js
+++ b/src/backend/src/Kernel.js
@@ -135,9 +135,14 @@ class Kernel extends AdvancedBase {
         const { services } = this;
 
         // Internal modules
-        for ( const module of this.modules ) {
-            services.registerModule(module.constructor.name, module);
-            await module.install(Context.get());
+        for ( const module_ of this.modules ) {
+            services.registerModule(module_.constructor.name, module_);
+            const mod_context = this._create_mod_context(Context.get(), {
+                name: module_.constructor.name,
+                ['module']: module_,
+                external: false,
+            });
+            await module_.install(mod_context);
         }
 
         // External modules
@@ -209,6 +214,8 @@ class Kernel extends AdvancedBase {
         const path_ = require('path');
         const fs = require('fs');
 
+        const mod_install_root_context = Context.get();
+
         const mod_paths = this.environment.mod_paths;
         for ( const mods_dirpath of mod_paths ) {
             const mod_dirnames = fs.readdirSync(mods_dirpath);
@@ -226,14 +233,60 @@ class Kernel extends AdvancedBase {
                     continue;
                 }
 
+                const mod_context = this._create_mod_context(mod_install_root_context, {
+                    name: mod_class.name ?? mod_dirname,
+                    ['module']: mod,
+                    external: true,
+                    mod_path,
+                });
+
                 if ( mod.install ) {
                     this.useapi.awithuse(async () => {
-                        await mod.install(Context.get());
+                        await mod.install(mod_context);
                     });
                 }
             }
         }
     }
+
+    _create_mod_context (parent, options) {
+        const path_ = require('path');
+        const fs = require('fs');
+
+        const modapi = {};
+
+        let mod_path = options.mod_path;
+        if ( ! mod_path && options.module.dirname ) {
+            mod_path = options.module.dirname();
+        }
+
+        if ( mod_path ) {
+            modapi.libdir = (prefix, directory) => {
+                const fullpath = path_.join(mod_path, directory);
+                const fsitems = fs.readdirSync(fullpath);
+                for ( const item of fsitems ) {
+                    if ( ! item.endsWith('.js') ) {
+                        continue;
+                    }
+                    const stat = fs.statSync(path_.join(fullpath, item));
+                    if ( ! stat.isFile() ) {
+                        continue;
+                    }
+
+                    const name = item.slice(0, -3);
+                    const path = path_.join(fullpath, item);
+                    let lib = require(path);
+
+                    // TODO: This context can be made dynamic by adding a
+                    // getter-like behavior to useapi.
+                    this.useapi.def(`${prefix}.${name}`, lib);
+                }
+            }
+        }
+        const mod_context = parent.sub({ modapi }, `mod:${options.name}`);
+        return mod_context;
+
+    }
 }
 
 module.exports = { Kernel };