add zod validated configuration and context

.env

@@ -0,0 +1,2 @@
+APP_VERSION=1.0.0-alpha
+DATABASE_URL="file:./dev.db"

.gitignore

@@ -1,3 +1 @@
 node_modules
-# Keep environment variables out of version control
-.env

README.md

@@ -19,3 +19,4 @@ bun run src/index.ts
 - **Pothos**
 - **Prisma** Database ORM
 - **Pino** Logger
+- **Zod** Schema validation

package.json

@@ -20,6 +20,7 @@
     "graphql": "^16.9.0",
     "graphql-yoga": "^5.10.4",
     "pino": "^9.5.0",
-    "pino-pretty": "^13.0.0"
+    "pino-pretty": "^13.0.0",
+    "zod": "^3.23.8"
   }
 }

src/config/index.ts

@@ -0,0 +1,22 @@
+import { logger } from "@lib/logger";
+import { z } from "zod";
+
+export interface Configuration {
+  app_version: string;
+}
+
+export const LoadConfig = (): Configuration => {
+  const { success, data, error } = z
+    .object({
+      APP_VERSION: z.string().default("development"),
+    })
+    .safeParse(process.env);
+
+  if (!success) {
+    logger.error(error.message);
+  }
+
+  return {
+    app_version: data!.APP_VERSION,
+  };
+};

src/prisma/index.ts

@@ -0,0 +1,3 @@
+import { PrismaClient } from "@prisma/client";
+
+export const prisma = new PrismaClient();

src/yoga/builder.ts

@@ -0,0 +1,29 @@
+import type { Configuration } from "@app/config";
+import { prisma } from "@app/prisma";
+import SchemaBuilder from "@pothos/core";
+import PrismaPlugin, {
+  type PrismaTypesFromClient,
+} from "@pothos/plugin-prisma";
+import type { YogaInitialContext } from "graphql-yoga";
+
+type Context = YogaInitialContext & {
+  config: Configuration;
+};
+
+export const builder = new SchemaBuilder<{
+  Context: Context;
+  PrismaTypes: PrismaTypesFromClient<typeof prisma>;
+}>({
+  plugins: [PrismaPlugin],
+  prisma: {
+    client: prisma,
+    // defaults to false, uses /// comments from prisma schema as descriptions
+    // for object types, relations and exposed fields.
+    // descriptions can be omitted by setting description to false
+    exposeDescriptions: false,
+    // use where clause from prismaRelatedConnection for totalCount (defaults to true)
+    filterConnectionTotalCount: true,
+    // warn when not using a query parameter correctly
+    onUnusedQuery: process.env.NODE_ENV === "production" ? null : "warn",
+  },
+});

src/yoga/context.ts

@@ -0,0 +1,10 @@
+import { LoadConfig } from "@app/config";
+import type { YogaInitialContext } from "graphql-yoga";
+
+export const context = (initialContext: YogaInitialContext) => {
+  const config = LoadConfig();
+  return {
+    ...initialContext,
+    config,
+  };
+};

src/yoga/index.ts

@@ -1,8 +1,10 @@
 import { yogaLogger } from "@lib/logger";
 import { createYoga } from "graphql-yoga";
+import { context } from "./context";
 import { schema } from "./schema";
 
 export const yoga = createYoga({
   schema,
+  context: context,
   logging: yogaLogger,
 });

src/yoga/schema.ts

@@ -1,27 +1,5 @@
-import SchemaBuilder from "@pothos/core";
+import { prisma } from "@app/prisma";
-import PrismaPlugin, {
+import { builder } from "./builder";
-  type PrismaTypesFromClient,
-} from "@pothos/plugin-prisma";
-import { PrismaClient } from "@prisma/client";
-
-const prisma = new PrismaClient();
-
-const builder = new SchemaBuilder<{
-  PrismaTypes: PrismaTypesFromClient<typeof prisma>;
-}>({
-  plugins: [PrismaPlugin],
-  prisma: {
-    client: prisma,
-    // defaults to false, uses /// comments from prisma schema as descriptions
-    // for object types, relations and exposed fields.
-    // descriptions can be omitted by setting description to false
-    exposeDescriptions: false,
-    // use where clause from prismaRelatedConnection for totalCount (defaults to true)
-    filterConnectionTotalCount: true,
-    // warn when not using a query parameter correctly
-    onUnusedQuery: process.env.NODE_ENV === "production" ? null : "warn",
-  },
-});
 
 const User = builder.prismaObject("User", {
   fields: (t) => ({
@@ -44,6 +22,9 @@ const Post = builder.prismaObject("Post", {
 
 builder.queryType({
   fields: (t) => ({
+    version: t.string({
+      resolve: (parent, args, context) => context.config.app_version,
+    }),
     users: t.prismaField({
       type: [User],
       resolve: async () => {