feature(web): Add the ability to customize the inference prompts. Fixes #170

2 files changed, 116 insertions, 0 deletions

diff --git a/packages/trpc/routers/_app.ts b/packages/trpc/routers/_app.ts
index 577b523e..01c92e6a 100644
--- a/packages/trpc/routers/_app.ts
+++ b/packages/trpc/routers/_app.ts
@@ -3,6 +3,7 @@ import { adminAppRouter } from "./admin";
 import { apiKeysAppRouter } from "./apiKeys";
 import { bookmarksAppRouter } from "./bookmarks";
 import { listsAppRouter } from "./lists";
+import { promptsAppRouter } from "./prompts";
 import { tagsAppRouter } from "./tags";
 import { usersAppRouter } from "./users";
 
@@ -12,6 +13,7 @@ export const appRouter = router({
   users: usersAppRouter,
   lists: listsAppRouter,
   tags: tagsAppRouter,
+  prompts: promptsAppRouter,
   admin: adminAppRouter,
 });
 // export type definition of API
diff --git a/packages/trpc/routers/prompts.ts b/packages/trpc/routers/prompts.ts
new file mode 100644
index 00000000..629d5829
--- /dev/null
+++ b/packages/trpc/routers/prompts.ts
@@ -0,0 +1,114 @@
+import { experimental_trpcMiddleware, TRPCError } from "@trpc/server";
+import { and, eq } from "drizzle-orm";
+import { z } from "zod";
+
+import { customPrompts } from "@hoarder/db/schema";
+import {
+  zNewPromptSchema,
+  zPromptSchema,
+  zUpdatePromptSchema,
+} from "@hoarder/shared/types/prompts";
+
+import { authedProcedure, Context, router } from "../index";
+
+export const ensurePromptOwnership = experimental_trpcMiddleware<{
+  ctx: Context;
+  input: { promptId: string };
+}>().create(async (opts) => {
+  const prompt = await opts.ctx.db.query.customPrompts.findFirst({
+    where: eq(customPrompts.id, opts.input.promptId),
+    columns: {
+      userId: true,
+    },
+  });
+  if (!opts.ctx.user) {
+    throw new TRPCError({
+      code: "UNAUTHORIZED",
+      message: "User is not authorized",
+    });
+  }
+  if (!prompt) {
+    throw new TRPCError({
+      code: "NOT_FOUND",
+      message: "Prompt not found",
+    });
+  }
+  if (prompt.userId != opts.ctx.user.id) {
+    throw new TRPCError({
+      code: "FORBIDDEN",
+      message: "User is not allowed to access resource",
+    });
+  }
+
+  return opts.next();
+});
+
+export const promptsAppRouter = router({
+  create: authedProcedure
+    .input(zNewPromptSchema)
+    .output(zPromptSchema)
+    .mutation(async ({ input, ctx }) => {
+      const [prompt] = await ctx.db
+        .insert(customPrompts)
+        .values({
+          text: input.text,
+          appliesTo: input.appliesTo,
+          userId: ctx.user.id,
+          enabled: true,
+        })
+        .returning();
+      return prompt;
+    }),
+  update: authedProcedure
+    .input(zUpdatePromptSchema)
+    .output(zPromptSchema)
+    .use(ensurePromptOwnership)
+    .mutation(async ({ input, ctx }) => {
+      const res = await ctx.db
+        .update(customPrompts)
+        .set({
+          text: input.text,
+          appliesTo: input.appliesTo,
+          enabled: input.enabled,
+        })
+        .where(
+          and(
+            eq(customPrompts.userId, ctx.user.id),
+            eq(customPrompts.id, input.promptId),
+          ),
+        )
+        .returning();
+      if (res.length == 0) {
+        throw new TRPCError({ code: "NOT_FOUND" });
+      }
+      return res[0];
+    }),
+  list: authedProcedure
+    .output(z.array(zPromptSchema))
+    .query(async ({ ctx }) => {
+      const prompts = await ctx.db.query.customPrompts.findMany({
+        where: eq(customPrompts.userId, ctx.user.id),
+      });
+      return prompts;
+    }),
+  delete: authedProcedure
+    .input(
+      z.object({
+        promptId: z.string(),
+      }),
+    )
+    .use(ensurePromptOwnership)
+    .mutation(async ({ input, ctx }) => {
+      const res = await ctx.db
+        .delete(customPrompts)
+        .where(
+          and(
+            eq(customPrompts.userId, ctx.user.id),
+            eq(customPrompts.id, input.promptId),
+          ),
+        );
+      if (res.changes == 0) {
+        throw new TRPCError({ code: "NOT_FOUND" });
+      }
+    }),
+});