Implement local SQLite backend and reactive UI

packages/shared/src/rpc/modelRpc.ts

@@ -1,16 +1,50 @@
 import type { Db } from "../db/database.js";
-import { getModel, updateModelCell } from "../db/queries.js";
-import { ok } from "./result.js";
+import { createModelRow, deleteModelRow, getModel, resolveCompany, updateModelCell } from "../db/queries.js";
+import { fail, ok } from "./result.js";
 import type { RpcHandlers } from "./types.js";
 
-export function modelHandlers(db: Db): RpcHandlers<"model.get" | "model.updateCell" | "model.runScenario"> {
+function errorDetail(operation: string, error: unknown): { operation: string; message?: string } {
   return {
-    "model.get": ({ companyId, tab }) => ok("model.get", getModel(db, companyId, tab)),
-    "model.updateCell": ({ companyId, tab, row, col, value }) =>
-      ok("model.updateCell", updateModelCell(db, companyId, tab, row, col, value)),
-    "model.runScenario": ({ companyId }) => {
-      const model = getModel(db, companyId, "income");
-      return ok("model.runScenario", model);
+    operation,
+    message: error instanceof Error ? error.message : undefined,
+  };
+}
+
+export function modelHandlers(db: Db): RpcHandlers<"model.get" | "model.updateCell" | "model.createRow" | "model.deleteRow" | "model.runScenario"> {
+  return {
+    "model.get": ({ companyId, tab }) => {
+      const company = resolveCompany(db, companyId);
+      if (!company) return fail("NOT_FOUND", `Company "${companyId}" not found.`);
+      try {
+        return ok("model.get", getModel(db, company.id, tab));
+      } catch (error) {
+        return fail("INTERNAL_ERROR", "Could not load model for company.", errorDetail("getModel", error));
+      }
+    },
+    "model.updateCell": ({ companyId, tab, row, col, value }) => {
+      const company = resolveCompany(db, companyId);
+      if (!company) return fail("NOT_FOUND", `Company "${companyId}" not found.`);
+      return ok("model.updateCell", updateModelCell(db, company.id, tab, row, col, value));
+    },
+    "model.createRow": ({ companyId, tab, label, kind, values }) => {
+      const company = resolveCompany(db, companyId);
+      if (!company) return fail("NOT_FOUND", `Company "${companyId}" not found.`);
+      return ok("model.createRow", createModelRow(db, company.id, tab, { label, kind, values: values ?? [] }));
+    },
+    "model.deleteRow": ({ companyId, tab, row }) => {
+      const company = resolveCompany(db, companyId);
+      if (!company) return fail("NOT_FOUND", `Company "${companyId}" not found.`);
+      return ok("model.deleteRow", { ok: deleteModelRow(db, company.id, tab, row) });
+    },
+    "model.runScenario": ({ companyId, overrides }) => {
+      const company = resolveCompany(db, companyId);
+      if (!company) return fail("NOT_FOUND", `Company "${companyId}" not found.`);
+      const model = getModel(db, company.id, "operating");
+      const rows = model.rows.map((row, rowIndex) => ({
+        ...row,
+        values: row.values.map((value, colIndex) => overrides[`${rowIndex}-${colIndex}`] ?? value),
+      }));
+      return ok("model.runScenario", { headers: model.headers, rows });
     },
   };
 }