feat: vendor permission system source

pi-permission-system/src/tool-input-prompt-formatters.ts

@@ -0,0 +1,63 @@
+import { countTextLines, formatCount } from "./tool-input-preview";
+import { getNonEmptyString, toRecord } from "./value-guards";
+
+export function getPromptPath(input: Record<string, unknown>): string | null {
+  return getNonEmptyString(input.path) ?? getNonEmptyString(input.file_path);
+}
+
+export function formatEditInputForPrompt(
+  input: Record<string, unknown>,
+): string {
+  const path = getPromptPath(input);
+  const rawEdits = Array.isArray(input.edits)
+    ? input.edits
+    : typeof input.oldText === "string" && typeof input.newText === "string"
+      ? [{ oldText: input.oldText, newText: input.newText }]
+      : [];
+
+  const edits = rawEdits
+    .map((edit) => toRecord(edit))
+    .filter(
+      (edit) =>
+        typeof edit.oldText === "string" && typeof edit.newText === "string",
+    );
+
+  const pathPart = path ? `for '${path}'` : "";
+  if (edits.length === 0) {
+    return pathPart ? `${pathPart} with edit input` : "with edit input";
+  }
+
+  const firstEdit = edits[0];
+  const oldText = String(firstEdit.oldText);
+  const newText = String(firstEdit.newText);
+  const firstEditSummary = `edit #1 replaces ${formatCount(countTextLines(oldText), "line", "lines")} with ${formatCount(countTextLines(newText), "line", "lines")}`;
+  const extraEdits =
+    edits.length > 1
+      ? `, plus ${formatCount(edits.length - 1, "additional edit", "additional edits")}`
+      : "";
+  const summary = `(${formatCount(edits.length, "replacement", "replacements")}: ${firstEditSummary}${extraEdits})`;
+  return pathPart ? `${pathPart} ${summary}` : summary;
+}
+
+export function formatWriteInputForPrompt(
+  input: Record<string, unknown>,
+): string {
+  const path = getPromptPath(input);
+  const content = typeof input.content === "string" ? input.content : "";
+  const summary = `(${formatCount(countTextLines(content), "line", "lines")}, ${formatCount(content.length, "character", "characters")})`;
+  return path ? `for '${path}' ${summary}` : summary;
+}
+
+export function formatReadInputForPrompt(
+  input: Record<string, unknown>,
+): string {
+  const path = getPromptPath(input);
+  const parts = path ? [`path '${path}'`] : [];
+  if (typeof input.offset === "number") {
+    parts.push(`offset ${input.offset}`);
+  }
+  if (typeof input.limit === "number") {
+    parts.push(`limit ${input.limit}`);
+  }
+  return parts.length > 0 ? `for ${parts.join(", ")}` : "";
+}