Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | 1x 1x 39x 39x 39x 39x 39x 39x 39x 39x 39x 8x 31x 6x 6x 39x 89x 31x 29x 29x 7x 6x 6x 6x 1x 1x 1x | export type ReadingHistoryEntry = {
slug: string;
url: string;
title: string;
category: string;
visitedAt: number;
progress: number;
};
export const READING_HISTORY_KEY = "zhixing:reading-history:v1";
export const READING_HISTORY_LIMIT = 20;
function isRecord(value: unknown): value is Record<string, unknown> {
return typeof value === "object" && value !== null;
}
function normalizeEntry(value: unknown): ReadingHistoryEntry | undefined {
Iif (!isRecord(value)) return undefined;
const slug = typeof value.slug === "string" ? value.slug.trim() : "";
const url = typeof value.url === "string" ? value.url.trim() : "";
const title = typeof value.title === "string" ? value.title.trim() : "";
const category = typeof value.category === "string" ? value.category.trim() : "";
const visitedAt = value.visitedAt;
const progress = value.progress;
if (
!slug ||
!url.startsWith("/posts/") ||
!title ||
!category ||
typeof visitedAt !== "number" ||
!Number.isFinite(visitedAt) ||
visitedAt < 0 ||
typeof progress !== "number" ||
!Number.isFinite(progress)
) {
return undefined;
}
return {
slug,
url,
title,
category,
visitedAt,
progress: Math.round(Math.min(100, Math.max(0, progress))),
};
}
function normalizeHistory(values: unknown[]): ReadingHistoryEntry[] {
const seen = new Set<string>();
return values
.map(normalizeEntry)
.filter((entry): entry is ReadingHistoryEntry => Boolean(entry))
.sort((a, b) => b.visitedAt - a.visitedAt)
.filter((entry) => {
if (seen.has(entry.slug)) return false;
seen.add(entry.slug);
return true;
})
.slice(0, READING_HISTORY_LIMIT);
}
export function parseReadingHistory(raw: string | null): ReadingHistoryEntry[] {
if (!raw) return [];
try {
const parsed: unknown = JSON.parse(raw);
return Array.isArray(parsed) ? normalizeHistory(parsed) : [];
} catch {
return [];
}
}
export function upsertReadingHistory(
entries: ReadingHistoryEntry[],
next: ReadingHistoryEntry,
): ReadingHistoryEntry[] {
return normalizeHistory([next, ...entries]);
}
export function serializeReadingHistory(entries: ReadingHistoryEntry[]): string {
return JSON.stringify(normalizeHistory(entries));
}
|