in progress: build out server side

server/entities/project.ts

@@ -1,9 +1,48 @@
-type Project = {
-    name: string;
-    startDate: Date;
-    endDate: Date;
-    current: boolean;
-    description: string;
-    tagIDs: string[];
-    media?: string[];   // array of URLs
+import { z } from "zod";
+
+export type Project = {
+    name:           string;
+    description:    string;
+    startDate:      Date;
+    endDate?:       Date;
+    tagIDs?:        string[];
+    media?:         string[];   // array of URLs
+}
+
+export class ProjectCreationError extends Error {
+    constructor(message: string) {
+        super(message);
+        this.name = "ProjectCreationError";
+    }
+}
+
+export const ZProject = z.object({
+    name: z.string(),
+    description: z.string(),
+    startDate: z.date(),
+    endDate: z.date().optional(),
+    tagIDs: z.array(z.string()).optional(),
+    media: z.array(z.string()).optional(),
+})
+
+export function createProject(data: Partial<Project>) {
+    if (!data.name) throw new ProjectCreationError("Project name is required");
+    if (!data.description) throw new ProjectCreationError("Project description is required");
+
+    const today = new Date();
+
+    const completeInput = {
+        name:           data.name,
+        description:    data.description,
+        startDate:      data.startDate || today,
+    }
+
+    const parsedProject = ZProject.safeParse(completeInput);
+
+    if (!parsedProject.success) throw new ProjectCreationError("Invalid project data");
+    return parsedProject.data satisfies Project;
+}
+
+export function isProject(data: unknown): data is Project {
+    return ZProject.safeParse(data).success;
 }