refactor(desktop): organize lib modules by domain

apps/desktop/src/lib/sql/sqlExecutionTarget.ts

@@ -0,0 +1,65 @@
+import * as api from "@/lib/backend/api";
+import type { DatabaseType } from "@/types/database";
+
+export type ExecuteMode = "all" | "current";
+
+export interface SqlExecutionSnapshot {
+  fullSql: string;
+  selectedSql: string;
+  cursorPos: number;
+}
+
+export type SqlExecutionOverride = string | SqlExecutionSnapshot;
+
+export type SqlExecutionTargetKind = "cursor" | "all";
+
+/**
+ * A candidate execution target surfaced by the execution target picker.
+ * `from`/`to` are offsets into the full document so the editor can highlight
+ * the corresponding range as a preview while the picker is open.
+ */
+export interface SqlExecutionCandidate {
+  kind: SqlExecutionTargetKind;
+  label: string;
+  sql: string;
+  from: number;
+  to: number;
+}
+
+export interface SqlExecutionChoiceRequest {
+  fullSql: string;
+  selectedSql: string;
+  cursorPos: number;
+  candidates: SqlExecutionCandidate[];
+}
+
+export function isSqlExecutionSnapshot(value: SqlExecutionOverride | undefined): value is SqlExecutionSnapshot {
+  return typeof value === "object" && value !== null && typeof value.fullSql === "string" && typeof value.selectedSql === "string" && typeof value.cursorPos === "number";
+}
+
+export function resolveExecutableSql(fullSql: string, selectedSql: string, options?: { mode?: ExecuteMode; cursorPos?: number }): string {
+  const trimmedSelection = selectedSql.trim();
+  if (trimmedSelection) return trimmedSelection;
+
+  if (options?.mode === "current" && options.cursorPos !== undefined) {
+    return fullSql;
+  }
+
+  return fullSql;
+}
+
+export async function resolveExecutableSqlWithBackend(fullSql: string, selectedSql: string, options?: { mode?: ExecuteMode; cursorPos?: number; databaseType?: DatabaseType }): Promise<string> {
+  const trimmedSelection = selectedSql.trim();
+  if (trimmedSelection) return trimmedSelection;
+
+  // MongoDB uses dedicated per-command gutter actions for "current command";
+  // the main editor execute action keeps its long-standing "run all text"
+  // behavior when nothing is selected.
+  if (options?.databaseType === "mongodb") return fullSql;
+
+  if (options?.mode === "current" && options.cursorPos !== undefined) {
+    return await api.findStatementAtCursor(fullSql, options.cursorPos, options.databaseType);
+  }
+
+  return fullSql;
+}