Added tag support + Post link and many more changes and optimizations.

prisma/schema.prisma

@@ -1,6 +1,3 @@
-// This is your Prisma schema file,
-// learn more about it in the docs: https://pris.ly/d/prisma-schema
-
 generator client {
   provider = "prisma-client-js"
 }
@@ -16,7 +13,7 @@ model User {
   email String @unique
   password String
   collections Collection[]
-  collectionsJoined UserAndCollection[]
+  collectionsJoined UsersAndCollections[]
   createdAt DateTime @default(now())
 }
 
@@ -25,12 +22,13 @@ model Collection {
   name String
   owner User @relation(fields: [ownerId], references: [id])
   ownerId Int
-  members UserAndCollection[]
+  members UsersAndCollections[]
   links Link[]
+  tags Tag[]
   createdAt DateTime @default(now())
 }
 
-model UserAndCollection {
+model UsersAndCollections {
   user User @relation(fields: [userId], references: [id])
   userId Int
 
@@ -51,4 +49,15 @@ model Link {
   url String
   collection Collection @relation(fields: [collectionId], references: [id])
   collectionId Int
+  tags Tag[]
+}
+
+model Tag {
+  id Int @id @default(autoincrement())
+  name String
+  links Link[]
+  collections Collection @relation(fields: [collectionId], references: [id])
+  collectionId Int
+
+  @@unique([name, collectionId])
 }