97 lines
2.9 KiB
TypeScript
97 lines
2.9 KiB
TypeScript
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import {
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discoverBlocks,
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mergeHeadingIdsIntoContentSegments,
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type ContentSegment,
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} from "@/lib/blog-blocks";
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export type { ContentSegment } from "@/lib/blog-blocks";
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/**
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* Creates a URL-safe slug from heading text (strip HTML, normalize, Persian-friendly).
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*/
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function slugify(text: string): string {
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const stripped = text.replace(/<[^>]*>/g, "").trim();
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return stripped
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.replace(/\s+/g, "-")
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.replace(/[^\p{L}\p{N}-]/gu, "")
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.replace(/-+/g, "-")
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.replace(/^-|-$/g, "")
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.toLowerCase() || "section";
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}
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export interface TocItem {
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id: string;
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text: string;
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level: number; // 2 = h2, 3 = h3, 4 = h4
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}
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const HEADING_REGEX = /<(h[234])[^>]*>([\s\S]*?)<\/\1>/gi;
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const usedIds = new Map<string, number>();
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function ensureUniqueId(baseId: string): string {
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const count = usedIds.get(baseId) ?? 0;
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usedIds.set(baseId, count + 1);
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return count === 0 ? baseId : `${baseId}-${count}`;
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}
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/**
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* پارس محتوا: ابتدا بلاکها کشف و به JSON تبدیل میشوند (blog-blocks)،
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* سپس id سرنویسها تزریق میشود و سگمنتهای نهایی برای رندر برمیگردند.
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*/
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export function parseContentHeadings(html: string): {
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contentWithIds: string;
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toc: TocItem[];
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segments: ContentSegment[];
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} {
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const { htmlWithPlaceholders, segments: rawSegments } = discoverBlocks(html);
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usedIds.clear();
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const toc: TocItem[] = [];
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let lastIndex = 0;
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let match: RegExpExecArray | null;
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const parts: string[] = [];
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const regex = new RegExp(HEADING_REGEX.source, "gi");
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while ((match = regex.exec(htmlWithPlaceholders)) !== null) {
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const [fullMatch, tag, inner] = match;
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const level = parseInt(tag.charAt(1), 10) as 2 | 3 | 4;
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const text = inner.replace(/<[^>]*>/g, "").trim();
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const baseId = slugify(text);
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const id = ensureUniqueId(baseId);
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toc.push({ id, text, level });
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const openTag = fullMatch.slice(0, fullMatch.indexOf(">") + 1);
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const hasId = /^\s*<h[234][^>]*\bid\s*=/i.test(openTag);
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const newOpenTag = hasId
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? openTag
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: openTag.replace(/^(<\s*h[234])(\s|>)/i, `$1 id="${id}"$2`);
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parts.push(htmlWithPlaceholders.slice(lastIndex, match.index));
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parts.push(newOpenTag + inner + `</${tag}>`);
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lastIndex = regex.lastIndex;
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}
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parts.push(htmlWithPlaceholders.slice(lastIndex));
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const contentWithIds = parts.join("");
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const segments = mergeHeadingIdsIntoContentSegments(
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contentWithIds,
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rawSegments
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);
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return { contentWithIds, toc, segments };
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}
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/** Average reading speed in words per minute (Persian/English mix). */
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const WPM = 200;
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/**
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* Estimates reading time in minutes from HTML content.
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*/
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export function getReadingTimeMinutes(html: string): number {
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const text = html.replace(/<[^>]*>/g, " ").replace(/\s+/g, " ").trim();
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const wordCount = text.split(/\s+/).filter(Boolean).length;
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return Math.max(1, Math.ceil(wordCount / WPM));
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}
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