feat: add message attachments (wip)

triplit/schema.ts

@@ -218,6 +218,9 @@ export const schema = S.Collections({
             topic: S.RelationOne('topics', {
                 where: [['id', '=', '$topicId']],
             }),
+            attachments: S.RelationMany('attachments', {
+                where: [['messageId', '=', '$id']],
+            }),
             parts: S.RelationMany('message_parts', {
                 where: [['messageId', '=', '$id']],
             }),
@@ -259,6 +262,80 @@ export const schema = S.Collections({
             },
         },
     },
+    // we split up the files and attachments table because we want to be able to
+    // store files on their own so they can be used in multiple messages at once
+    files: {
+        schema: S.Schema({
+            id: S.Id(),
+            userId: S.String(),
+            name: S.String(),
+            mimeType: S.String(),
+            url: S.String(),
+            createdAt: S.Date({ default: S.Default.now() }),
+        }),
+        permissions: {
+            authenticated: {
+                read: {
+                    filter: [['userId', '=', '$token.sub']],
+                },
+                insert: {
+                    filter: [['userId', '=', '$token.sub']],
+                },
+                update: {
+                    filter: [['userId', '=', '$token.sub']],
+                },
+                postUpdate: {
+                    filter: [['userId', '=', '$prev.userId']],
+                },
+                delete: {
+                    filter: [['userId', '=', '$token.sub']],
+                },
+            },
+        }
+    },
+    attachments: {
+        schema: S.Schema({
+            id: S.Id(),
+            userId: S.String(),
+            topicId: S.String(),
+            messageId: S.String(),
+            fileId: S.String(),
+            // Denormalized for zero-subquery rendering. However, this can be
+            // dangerous. It is absolutely PARAMOUNT that whenver a file is
+            // modified, it's children attachments are modified as well.
+            name: S.String(),
+            mimeType: S.String(),
+            url: S.String(),
+            createdAt: S.Date({ default: S.Default.now() }),
+        }),
+        relationships: {
+            topic: S.RelationOne('topics', {
+                where: [['id', '=', '$topicId']],
+            }),
+            message: S.RelationOne('messages', {
+                where: [['id', '=', '$messageId']],
+            }),
+        },
+        permissions: {
+            authenticated: {
+                read: {
+                    filter: [['userId', '=', '$token.sub']],
+                },
+                insert: {
+                    filter: [['userId', '=', '$token.sub']],
+                },
+                update: {
+                    filter: [['userId', '=', '$token.sub']],
+                },
+                postUpdate: {
+                    filter: [['userId', '=', '$prev.userId']],
+                },
+                delete: {
+                    filter: [['userId', '=', '$token.sub']],
+                },
+            }
+        }
+    },
     generations: {
         schema: S.Schema({
             id: S.Id(),