Add function to create new organisations

+ Extract common functions from the admin controller

src/Controllers/organisation.controller.ts

@@ -1,6 +1,7 @@
+import { PrismaClientUnknownRequestError } from "@prisma/client/runtime";
 import { Request, Response } from "express";
 import prisma from "../lib/prisma";
-import { DataType, generateInvalidBodyError } from "./common";
+import { AUTH_ERROR, createInsufficientPermissionsError, DataType, generateInvalidBodyError } from "./common";
 
 export const getAllOrganisations = async (req: Request, res: Response) => {
   const organisations = await prisma.organisation.findMany({
@@ -49,3 +50,62 @@ export const getOrganisation = async (req: Request<GetOrganisationQueryParams>,
     },
   });
 };
+
+interface CreateOrganisationQueryParams {
+  eventPid: string;
+}
+
+interface CreateOrganisationBody {
+  name?: string;
+}
+
+// at: POST /api/events/:eventPid/organisations
+// requires: auth(ELEVATED)
+export const createOrganisation = async (
+  req: Request<CreateOrganisationQueryParams, {}, CreateOrganisationBody>,
+  res: Response
+) => {
+  if (!req.auth?.isAuthenticated) {
+    return res.status(500).json(AUTH_ERROR);
+  }
+
+  if (req.auth.permission_level !== "ELEVATED") {
+    return res.status(403).json(createInsufficientPermissionsError());
+  }
+
+  const { name } = req.body || {};
+  const { eventPid } = req.params;
+
+  if (typeof name !== "string") {
+    return res.status(400).json(generateInvalidBodyError({ name: DataType.STRING, eventId: DataType.UUID }));
+  }
+
+  // Check if event exists
+
+  try {
+    const event = await prisma.event.findUnique({ where: { pid: eventPid } });
+
+    if (!event) {
+      return res.status(404).json({
+        type: "error",
+        payload: {
+          message: `The event with the ID ${eventPid} could not be found`,
+        },
+      });
+    }
+  } catch (e) {
+    // REVIEW: Check for valid UUID
+    if (e instanceof PrismaClientUnknownRequestError) {
+      return res.status(400).send({
+        type: "error",
+        payload: {
+          message: "Unknown error occured. This could be to malformed IDs",
+        },
+      });
+    }
+  }
+
+  const organisation = await prisma.organisation.create({ data: { name, event: { connect: { pid: eventPid } } } });
+
+  res.status(201).json({ type: "success", payload: { organisation } });
+};