42 lines
1.1 KiB
TypeScript
42 lines
1.1 KiB
TypeScript
import { randomUUID } from "node:crypto";
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import * as os from "node:os";
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import * as path from "node:path";
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export type CanvasSnapshotPayload = {
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format: string;
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base64: string;
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};
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function asRecord(value: unknown): Record<string, unknown> {
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return typeof value === "object" && value !== null
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? (value as Record<string, unknown>)
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: {};
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}
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function asString(value: unknown): string | undefined {
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return typeof value === "string" ? value : undefined;
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}
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export function parseCanvasSnapshotPayload(
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value: unknown,
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): CanvasSnapshotPayload {
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const obj = asRecord(value);
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const format = asString(obj.format);
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const base64 = asString(obj.base64);
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if (!format || !base64) {
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throw new Error("invalid canvas.snapshot payload");
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}
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return { format, base64 };
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}
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export function canvasSnapshotTempPath(opts: {
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ext: string;
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tmpDir?: string;
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id?: string;
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}) {
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const tmpDir = opts.tmpDir ?? os.tmpdir();
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const id = opts.id ?? randomUUID();
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const ext = opts.ext.startsWith(".") ? opts.ext : `.${opts.ext}`;
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return path.join(tmpDir, `clawdis-canvas-snapshot-${id}${ext}`);
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}
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