Restore correct file schema from PR #47 (full version)

Author: ShriramJana

src/server/db/schema/file.ts

@@ -1,21 +1,73 @@
 import { relations, sql } from 'drizzle-orm';
 import {
   pgTable,
+  varchar,
   text,
+  boolean,
+  integer,
+  timestamp,
+  index,
+  uniqueIndex,
+  check,
 } from 'drizzle-orm/pg-core';
 import { user } from './user';
 import { section } from './section';
 
-export const file = pgTable('file', {
-  id: text('id')
-    .default(sql`nanoid(20)`)
-    .primaryKey(),
-  authorId: text('author_id')
-    .notNull()
-    .references(() => user.id),
-  sectionId: text('section_id').references(() => section.id),
-  file_name: text('file_name').notNull(),
-});
+export const file = pgTable(
+  'file',
+  {
+    // NOTE: Use for storing in the bucket, not file name or file title.
+    id: varchar('id', { length: 20 })
+      .default(sql`nanoid(20)`)
+      .primaryKey(),
+
+    authorId: text('author_id')
+      .notNull()
+      .references(() => user.id, { onDelete: 'cascade' }), // Could be 'set null' too, depending on what we want to do with it.
+
+    sectionId: varchar('section_id', { length: 6 })
+      .references(() => section.id, { onDelete: 'set null' }),
+
+    fileTitle: text('file_title')
+      .notNull(),
+
+    fileName: text('file_name')
+      .notNull(),
+
+    publishDate: timestamp('publish_date', { withTimezone: true })
+      .notNull()
+      .defaultNow(),
+
+    likes: integer('likes')
+      .notNull()
+      .default(0),
+    saves: integer('saves')
+      .notNull()
+      .default(0),
+
+    // Edit flag for future workflows
+    edited: boolean('edited').notNull().default(false),
+
+    createdAt: timestamp('created_at', { withTimezone: true })
+      .notNull()
+      .defaultNow(),
+    editedAt: timestamp('edited_at', { withTimezone: true })
+      .notNull()
+      .defaultNow(),
+  },
+  (t) => ([
+    // REVIEW: This is CASE SENSITIVE. File != file similar to Linux.
+    // So a user could have "Lecture 1 Notes" and "lecture 1 notes".
+    // I would recommend adding a PG extension for to support insensitivity.
+    uniqueIndex('file_title_unique_idx').on(t.authorId, t.fileTitle),
+    index('file_by_author_idx').on(t.authorId),
+    index('file_by_section_idx').on(t.sectionId),
+    index('file_by_publish_date_idx').on(t.publishDate),
+
+    check('file_likes_nonneg', sql`${t.likes} >= 0`),
+    check('file_saves_nonneg', sql`${t.saves} >= 0`),
+  ]),
+);
 
 export const fileRelations = relations(file, ({ one }) => ({
   author: one(user, {