From df03453ad05a3f534eafcfb947f2b5c56354ecc9 Mon Sep 17 00:00:00 2001
From: Dev Singh <dev@devksingh.com>
Date: Fri, 3 Oct 2025 13:27:21 -0500
Subject: [PATCH 1/2] Create store inventory tables

---
 terraform/modules/dynamo/main.tf | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/terraform/modules/dynamo/main.tf b/terraform/modules/dynamo/main.tf
index 73a1a77e..169b9621 100644
--- a/terraform/modules/dynamo/main.tf
+++ b/terraform/modules/dynamo/main.tf
@@ -339,3 +339,22 @@ resource "aws_dynamodb_table" "sig_info" {
     projection_type = "KEYS_ONLY"
   }
 }
+
+resource "aws_dynamodb_table" "store_inventory" {
+  billing_mode                = "PAY_PER_REQUEST"
+  name                        = "${var.ProjectId}-store-inventory"
+  deletion_protection_enabled = true
+  hash_key                    = "productId"
+  range_key                   = "variantId"
+  point_in_time_recovery {
+    enabled = true
+  }
+  attribute {
+    name = "productId"
+    type = "S"
+  }
+  attribute {
+    name = "variantId"
+    type = "S"
+  }
+}

From 80b09c55cf1bf4cdaab67974b5b2394e7b9b5b65 Mon Sep 17 00:00:00 2001
From: Dev Singh <dev@devksingh.com>
Date: Fri, 3 Oct 2025 13:56:31 -0500
Subject: [PATCH 2/2] Add templated code

---
 src/api/functions/store.ts | 47 ++++++++++++++++++++++++++++++++++++++
 src/common/config.ts       |  3 +++
 2 files changed, 50 insertions(+)
 create mode 100644 src/api/functions/store.ts

diff --git a/src/api/functions/store.ts b/src/api/functions/store.ts
new file mode 100644
index 00000000..ebdb09e6
--- /dev/null
+++ b/src/api/functions/store.ts
@@ -0,0 +1,47 @@
+// TODO: (store) Create a function to check if a given product and variant are sellable to a given user
+// If it is sellable, return the price ID to create a stripe checkout session for
+
+import { type DynamoDBClient } from "@aws-sdk/client-dynamodb";
+import { type Redis } from "api/types.js";
+
+// If not, return null.
+export type CheckItemSellableInputs = {
+  userId: string; // This is generally their Illinois email
+  productId: string;
+  variantId: string;
+  dynamoClient: DynamoDBClient;
+  redisClient: Redis;
+};
+
+export type CheckItemSellableOutputs = null | string;
+
+export async function checkItemSellable({
+  userId,
+  productId,
+  variantId,
+  dynamoClient,
+  redisClient,
+}: CheckItemSellableInputs): Promise<CheckItemSellableOutputs> {
+  // In a transaction:
+  // First, check if there is stock.
+  // If there is stock, check that the user is still under their limit.
+  // If there is, check if they are a paid member.
+  // If paid member return member_price_id for the variant request, if not return the nonmember_price_id
+  return null;
+}
+
+export type CreateCheckoutSessionInputs = {
+  priceId: string;
+  username: string;
+  stripeApiKey: string;
+};
+
+export type CreateCheckoutSessionOutputs = string;
+
+export async function createCheckoutSession({
+  priceId,
+}: CreateCheckoutSessionInputs): Promise<CreateCheckoutSessionOutputs> {
+  // Check stripe modules createCheckoutSession function
+  // initatior string should be "acm-store"
+  return "";
+}
diff --git a/src/common/config.ts b/src/common/config.ts
index 0d1801da..423f1b5d 100644
--- a/src/common/config.ts
+++ b/src/common/config.ts
@@ -64,6 +64,8 @@ export type GenericConfigType = {
   UserInfoTable: string;
   SigInfoTableName: string;
   EntraHostedDomainName: string;
+  StoreInventoryTableName: string;
+  // TODO: (store) add other tables
 };
 
 type EnvironmentConfigType = {
@@ -106,6 +108,7 @@ const genericConfig: GenericConfigType = {
   UserInfoTable: "infra-core-api-user-info",
   SigInfoTableName: "infra-core-api-sigs",
   EntraHostedDomainName: "acmillinois.onmicrosoft.com",
+  StoreInventoryTableName: "infra-core-api-store-inventory"
 } as const;
 
 const environmentConfig: EnvironmentConfigType = {