Sell resources endpoint and postgres function

.gitignore

@@ -42,3 +42,4 @@ database.db
 .env
 /sql/create-users.sql
 /.dir-locals.el
+sql/queries.sql

README.md

@@ -26,13 +26,5 @@ DB_DATABASE=
 
 ## API Endpoints
 
-POST `/user/login` check if user exists
+Refer to ~test-endpoints.restclient~ for an up-to-date list of endpoints. If you want to use this to
-GET `/user/USER_ID/stakes` get stake event
+actually query the endpoints, it's not too hard to setup with Emacs.
-POST `/user/USER_ID/stakes/claim` claim stake
-POST `/user/USER_ID/stakes/start` start stake
-GET `/user/USER_ID/bank-account` get balance
-PUT `/user/USER_ID/bank-account` sell resource
-GET `/user/USER_ID/inventory-items` get inventory items
-POST `/user/USER_ID/inventory-items` buy item
-GET `/user/USER_ID/staking-sources` get staking sources
-POST `/user/USER_ID/staking-sources` create staking source

sql/procedures.sql

@@ -54,6 +54,60 @@ begin
 end;
 $$ language plpgsql;
 
+
+create or replace function sell_resources(
+  p_user_id uuid,
+  p_resources jsonb
+)
+returns table (
+  "resourceName" text,
+  "resourceAmount" integer,
+  "returnAmount" integer,
+  "saleResult" text
+)
+as $$
+declare
+  resource jsonb;
+  resource_name text;
+  resource_amount integer;
+  return_amount integer;
+  resource_sell_factor real;
+  sale_result text;
+begin
+  for resource in select * from jsonb_array_elements(p_resources)
+  loop
+    resource_name := resource ->> 'resourceType';
+    resource_amount := (resource ->> 'resourceAmount')::integer;
+    sale_result := null;
+
+    begin
+      update resource_account
+      set balance = balance - resource_amount
+      where user_id = p_user_id and resource_id = (
+        select id from resource where name = resource_name
+      );
+    exception
+      when others then
+        sale_result := 'Error: Insufficient amount';
+    end;
+
+    if sale_result is null then
+      select value into resource_sell_factor
+      from game_constants
+      where key = resource_name || 'ToMoonbucks';
+
+      update bank_account
+      set balance = balance + resource_amount * resource_sell_factor
+      where user_id = p_user_id
+      returning resource_amount * resource_sell_factor into return_amount;
+
+      sale_result := 'Success';
+    end if;
+    return query select resource_name, resource_amount, return_amount, sale_result;
+  end loop;
+end;
+$$ language plpgsql;
+
 create or replace function clear_user_data(p_user_id uuid)
 returns void
 as $$

sql/queries.sql

@@ -1,40 +0,0 @@
-select * from users;
-
-select * from resource;
-
-select * from resource_account;
-
-select * from bank_account;
-
-select * from resource_account
-join users on resource_account.user_id = users.id
-join resource on resource.id = resource_account.resource_id
-where users.name = 'Harry';
-
-update bank_account
-set balance = 2000
-from users
-where bank_account.user_id = users.id and name = 'Joe';
-
-select * from staking_source;
-select * from resource_well;
-
-select * from inventory_item;
-
-select * from upgrade_event;
-
-delete from upgrade_event;
-
-update inventory_item set tier = 0;
-
-select * from staking_event;
-
-update staking_event set created_at = '2023-03-30 05:05:39.696926+00'
-where id = 'e53ef75e-fbb8-453f-a55c-758683bb0bb4';
-
-select * from claim_event;
-
-delete from claim_event;
-
-alter table store_item alter column price type integer using price::integer;
-

src/app/page.tsx

@@ -75,7 +75,7 @@ export default function Home() {
   };
 
   const fetchBankAccount = async () => {
-    const response = await fetch(`/api/user/${userId}/bank-account`);
+    const response = await fetch(`/api/user/${userId}/account`);
     const bankAccount = await response.json();
     setBankAccount(bankAccount);
   };
@@ -171,17 +171,27 @@ export default function Home() {
     }
   };
 
-  // TODO Joe create sql
   const sellResource = async (pairs: IConversionPair[]) => {
-    console.log("Selling resource");
+    const response = await fetch(`/api/user/${userId}/account`, {
-    const response = await fetch(`/api/user/${userId}/bank-account`, {
       method: "PUT",
       headers: { "Content-Type": "application/json" },
       body: JSON.stringify({
         pairs: pairs,
       }),
     });
-    return await response.json();
+
+    if (!response.ok) {
+      const error = await response.text();
+      setNotification({ message: error, type: "Error" });
+    }
+    if (response.status == 200) {
+      const data = await response.json();
+      setNotification({
+        message: `You've received ${data[0].returnAmount} $MoonBucks`,
+        type: "Success",
+      });
+      fetchBankAccount();
+    }
   };
 
   const buyStoreItem = async (storeItemId: number) => {
@@ -293,10 +303,6 @@ export default function Home() {
     }
   };
 
-  const handleSetLightBox = () => {
-    setLightBoxIsActive(!lightBoxIsActive);
-  };
-
   const handleCloseNotification = () => {
     setNotification(null);
   };
@@ -316,7 +322,7 @@ export default function Home() {
   if (isLoading) {
     return <p>Loading...</p>;
   }
-  console.log(stakingSources);
+
   return (
     <>
       <Navbar setUserId={setUserId} />

src/pages/api/user/[userId]/account.ts

@@ -8,9 +8,9 @@ export default async function handler(
   res: NextApiResponse
 ) {
   try {
+    const db = postgresConnection;
     if (req.method === "GET") {
       const { userId } = req.query;
-      const db = postgresConnection;
 
       if (!checkIfValidUUID(userId)) {
         return res.status(400).json({error: "Invalid UUID for user id"});
@@ -23,19 +23,21 @@ export default async function handler(
       } else {
         return res.status(400).json({error: "Could not find accounts for user"});
       }
-    }
 
-    if (req.method === "PUT") {
+    } else if (req.method === "PUT") {
-      // sell resource
+
-      // payload userId, key:resourceName/value:amount
       const { userId } = req.query;
-      // an array of IConversionPairs
       const { pairs } = req.body;
-      // check they have appropriate amount of each resource
+
-      // increment balance
+      const result = await db.query("select * from sell_resources($1, $2)", [userId, JSON.stringify(pairs)]);
-      // decrement resources
+      if (result.rowCount > 0) {
+        return res.status(200).json(result.rows);
+      } else {
+        return res.status(400).json({error: "Could not find accounts for user"});
+      }
+
     }
   } catch (error) {
-    res.status(500).json(error);
+    res.status(500).json(error.message);
   }
 }

test-endpoints.restclient

@@ -17,9 +17,25 @@ POST http://localhost:3000/api/user/login
 { "wallet" : "Wallet12345678" }
 
 # Get bank account
-GET http://localhost:3000/api/user/:user_id/bank-account
+GET http://localhost:3000/api/user/:user_id/account
 :headers
 
+# Sell a resource
+PUT http://localhost:3000/api/user/:user_id/account
+:headers
+{
+  "pairs": [
+    {
+      "resourceType": "Sollux",
+      "resourceAmount": 100
+    },
+    {
+      "resourceType": "Novafor",
+      "resourceAmount": 100
+    }
+  ]
+}
+
 # Clear user data
 POST http://localhost:3000/api/user/:user_id/clear-data
 :headers