From d4d10ed1b075d8f10a4bcf837373e199019f635f Mon Sep 17 00:00:00 2001
From: BryannYeap <e0543723@u.nus.edu>
Date: Mon, 10 Oct 2022 16:31:06 +0800
Subject: [PATCH] [offers][feat] Add sorting functionality to list offers

---
 apps/portal/src/pages/offers/test.tsx   |  1 +
 apps/portal/src/server/router/offers.ts | 72 ++++++++++++++++++++++++-
 2 files changed, 71 insertions(+), 2 deletions(-)

diff --git a/apps/portal/src/pages/offers/test.tsx b/apps/portal/src/pages/offers/test.tsx
index df41ae88..5206935f 100644
--- a/apps/portal/src/pages/offers/test.tsx
+++ b/apps/portal/src/pages/offers/test.tsx
@@ -9,6 +9,7 @@ function test() {
       limit: 3,
       location: 'Singapore, Singapore',
       offset: 0,
+      sortBy: '-monthYearReceived',
       yoeCategory: 0,
     },
   ]);
diff --git a/apps/portal/src/server/router/offers.ts b/apps/portal/src/server/router/offers.ts
index 17fe2a34..28e6c0eb 100644
--- a/apps/portal/src/server/router/offers.ts
+++ b/apps/portal/src/server/router/offers.ts
@@ -20,7 +20,9 @@ const getYoeRange = (yoeCategory: number) => {
     : null;
 };
 
-const sortingKeys = ['date', 'tc', 'yoe'];
+const ascOrder = '+';
+const descOrder = '-';
+const sortingKeys = ['monthYearReceived', 'totalCompensation', 'yoe'];
 
 const createSortByValidationRegex = () => {
   const startsWithPlusOrMinusOnly = '^[+-]{1}';
@@ -38,7 +40,7 @@ export const offersRouter = createRouter().query('list', {
     offset: z.number().nonnegative(),
     salaryMax: z.number().nullish(),
     salaryMin: z.number().nonnegative().nullish(),
-    sortby: z.string().regex(createSortByValidationRegex()).nullish(),
+    sortBy: z.string().regex(createSortByValidationRegex()).nullish(),
     title: z.string().nullish(),
     yoeCategory: z.number().min(0).max(3),
   }),
@@ -224,6 +226,72 @@ export const offersRouter = createRouter().query('list', {
       return validRecord;
     });
 
+    data = data.sort((offer1, offer2) => {
+      const defaultReturn =
+        offer2.monthYearReceived.getTime() - offer1.monthYearReceived.getTime();
+
+      if (!input.sortBy) {
+        return defaultReturn;
+      }
+
+      const order = input.sortBy.charAt(0);
+      const sortingKey = input.sortBy.substring(1);
+
+      if (order === ascOrder) {
+        return (() => {
+          if (sortingKey === 'monthYearReceived') {
+            return (
+              offer1.monthYearReceived.getTime() -
+              offer2.monthYearReceived.getTime()
+            );
+          }
+
+          if (sortingKey === 'totalCompensation') {
+            const salary1 = offer1.OffersFullTime?.totalCompensation.value
+              ? offer1.OffersFullTime?.totalCompensation.value
+              : offer1.OffersIntern?.monthlySalary.value;
+
+            const salary2 = offer2.OffersFullTime?.totalCompensation.value
+              ? offer2.OffersFullTime?.totalCompensation.value
+              : offer2.OffersIntern?.monthlySalary.value;
+
+            if (salary1 && salary2) {
+              return salary1 - salary2;
+            }
+          }
+          return defaultReturn;
+        })();
+      }
+
+      if (order === descOrder) {
+        return (() => {
+          if (sortingKey === 'monthYearReceived') {
+            return (
+              offer2.monthYearReceived.getTime() -
+              offer1.monthYearReceived.getTime()
+            );
+          }
+
+          if (sortingKey === 'totalCompensation') {
+            const salary1 = offer1.OffersFullTime?.totalCompensation.value
+              ? offer1.OffersFullTime?.totalCompensation.value
+              : offer1.OffersIntern?.monthlySalary.value;
+
+            const salary2 = offer2.OffersFullTime?.totalCompensation.value
+              ? offer2.OffersFullTime?.totalCompensation.value
+              : offer2.OffersIntern?.monthlySalary.value;
+
+            if (salary1 && salary2) {
+              return salary2 - salary1;
+            }
+          }
+
+          return defaultReturn;
+        })();
+      }
+      return defaultReturn;
+    });
+
     return data;
   },
 });