refactor(desktop): organize lib modules by domain

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

@@ -0,0 +1,26 @@
+export interface SqlSingleQuoteCaretOptions {
+  previousValue: string;
+  nextValue: string;
+  selectionStart: number | null | undefined;
+}
+
+export function insertedSqlSingleQuoteAtCaret(options: SqlSingleQuoteCaretOptions): boolean {
+  const { previousValue, nextValue, selectionStart } = options;
+  if (typeof selectionStart !== "number" || selectionStart < 1) return false;
+  if (nextValue.charAt(selectionStart - 1) !== "'") return false;
+  return nextValue.slice(0, selectionStart - 1) + nextValue.slice(selectionStart) === previousValue;
+}
+
+export function caretPositionInsideInsertedSqlSingleQuotes(options: SqlSingleQuoteCaretOptions): number | null {
+  const { previousValue, nextValue, selectionStart } = options;
+  if (typeof selectionStart !== "number" || selectionStart < 2) return null;
+  if (nextValue.slice(selectionStart - 2, selectionStart) !== "''") return null;
+
+  const singleQuoteInsertPrevious = nextValue.slice(0, selectionStart - 1) + nextValue.slice(selectionStart);
+  if (singleQuoteInsertPrevious === previousValue) return selectionStart - 1;
+
+  const pairInsertPrevious = nextValue.slice(0, selectionStart - 2) + nextValue.slice(selectionStart);
+  if (pairInsertPrevious === previousValue) return selectionStart - 1;
+
+  return null;
+}