import type { FileDiffMetadata } from "@pierre/diffs";import type { PullRequestDiffSide } from "@t3tools/contracts"; /** * Whether a conversation's line is really in this file's hunks. * * A thread naming a file is not the same as a thread the diff can show: its line may have moved * out of the change, or sit in a hunk the host withheld. Pinning it anyway would put the remark * against whatever code now occupies that line number, and silently dropping it would lose the * conversation, so the answer decides which of the two lists it belongs in. */export function isLineInFileDiff(  file: FileDiffMetadata,  side: PullRequestDiffSide,  line: number,): boolean {  return file.hunks.some((hunk) =>    side === "left"      ? line >= hunk.deletionStart && line < hunk.deletionStart + hunk.deletionCount      : line >= hunk.additionStart && line < hunk.additionStart + hunk.additionCount,  );} /** What the toolbar last asked of every file at once, null being the reader asking nothing yet. */export type DiffFoldOverride = "expanded" | "folded" | null; /** * Whether a file is drawn folded. * * A diff arrives a slice at a time, so the reader's own choices are kept as the difference from * what the toolbar last said rather than as the set of folded files: a file that has not loaded * yet cannot be in a set, and would otherwise land expanded moments after the reader folded * everything. Folded is the starting point whatever the change's size, because laying out every * file of it costs the reader the seconds before the tab is usable and buries the file they came * for among the ones they did not. */export function isFileDiffCollapsed(  fileKey: string,  foldOverride: DiffFoldOverride,  toggledFileKeys: ReadonlySet<string>,): boolean {  const foldedByDefault = foldOverride !== "expanded";  return toggledFileKeys.has(fileKey) ? !foldedByDefault : foldedByDefault;}