59 lines
2.3 KiB
JavaScript
59 lines
2.3 KiB
JavaScript
export const BOARD_SESSION_KEY = "matrix-board-session-v1";
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function validContext(context) {
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return context === null || (
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context && ["template", "animation"].includes(context.type)
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&& ["id", "name", "revision", "baseline"].every((key) => typeof context[key] === "string" && context[key])
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&& typeof context.readOnly === "boolean"
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&& (context.type !== "animation" || context.readOnly)
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);
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}
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export function readBoardSession(storage, draft, bootId) {
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const raw = storage?.getItem(BOARD_SESSION_KEY);
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if (!raw) return { bootId: null, context: null };
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try {
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const value = JSON.parse(raw);
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if (value.version !== 1 || typeof value.bootId !== "string" || !validContext(value.context)) {
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throw new Error("invalid session");
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}
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return {
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bootId: value.bootId,
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context: value.bootId === bootId && value.draft === draft ? value.context : null,
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};
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} catch {
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throw new Error("画板保存绑定损坏或来自未来版本；原值已保留，请另存当前内容后处理浏览器存储。");
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}
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}
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export function writeBoardSession(storage, bootId, draft, context) {
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storage.setItem(BOARD_SESSION_KEY, JSON.stringify({ version: 1, bootId, draft, context }));
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}
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// Resolve only editable static defaults and the read-only demo animation.
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// Ordinary animations retain their existing explicit frame editing workflow.
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export async function loadDefaultBoard(apiJson) {
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const reference = await apiJson("/api/display/default-content");
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if (reference.type === "template") {
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return { ...await apiJson(`/api/templates/${reference.id}`), type: "template" };
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}
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if (reference.type !== "animation" || !reference.is_demo) return null;
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const animation = await apiJson(`/api/animations/${reference.id}/frames`);
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const first = animation.frames[0];
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if (!first) throw new Error("默认演示动图没有帧");
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const frame = await apiJson(`/api/animations/${reference.id}/frames/${first.id}`);
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return { ...animation, type: "animation", read_only: true, scene: frame.scene };
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}
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export async function initializeDefaultBoard({ canLoad, load, apply, retain }) {
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if (!canLoad()) return false;
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const content = await load();
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if (!canLoad()) {
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retain();
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return false;
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}
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if (content) apply(content);
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else retain();
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return Boolean(content);
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}
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