Merge feature/seo-content-audit-tool-l9k into master

seo-tool/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env*
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

seo-tool/README.md

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+This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+# or
+pnpm dev
+# or
+bun dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+
+This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/app/building-your-application/deploying) for more details.

seo-tool/app/api/content-analysis/route.ts

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+import { NextRequest, NextResponse } from 'next/server';
+import axios from 'axios';
+import * as cheerio from 'cheerio';
+import { removeStopwords } from 'stopword';
+
+export async function POST(request: NextRequest) {
+  try {
+    const { url } = await request.json();
+
+    if (!url) {
+      return NextResponse.json(
+        { error: 'URL is required' },
+        { status: 400 }
+      );
+    }
+
+    // Validate URL format
+    try {
+      new URL(url);
+    } catch {
+      return NextResponse.json(
+        { error: 'Invalid URL format' },
+        { status: 400 }
+      );
+    }
+
+    // Fetch the webpage
+    const response = await axios.get(url, {
+      headers: {
+        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36',
+      },
+      timeout: 10000,
+    });
+
+    const html = response.data;
+    const $ = cheerio.load(html);
+
+    // Analyze heading structure
+    const headingStructure = [] as Array<{ level: string; text: string; order: number }>;
+    let order = 0;
+
+    $('h1, h2, h3, h4, h5, h6').each((_, el) => {
+      const tagName = el.tagName.toLowerCase();
+      const text = $(el).text().trim();
+      if (text) {
+        headingStructure.push({
+          level: tagName,
+          text,
+          order: order++,
+        });
+      }
+    });
+
+    // Count headings by level
+    const headingCounts = {
+      h1: $('h1').length,
+      h2: $('h2').length,
+      h3: $('h3').length,
+      h4: $('h4').length,
+      h5: $('h5').length,
+      h6: $('h6').length,
+    };
+
+    // Extract and analyze body text
+    $('script, style, nav, footer, header, aside').remove();
+    const bodyText = $('body').text().replace(/\s+/g, ' ').trim();
+
+    // Word count
+    const words = bodyText.split(/\s+/).filter(word => word.length > 0);
+    const wordCount = words.length;
+
+    // Character count
+    const characterCount = bodyText.length;
+    const characterCountNoSpaces = bodyText.replace(/\s/g, '').length;
+
+    // Sentence count (approximate)
+    const sentences = bodyText.split(/[.!?]+/).filter(s => s.trim().length > 0);
+    const sentenceCount = sentences.length;
+
+    // Average words per sentence
+    const avgWordsPerSentence = sentenceCount > 0 ? Math.round(wordCount / sentenceCount) : 0;
+
+    // Extract keywords (most common words, excluding stopwords)
+    const cleanWords = words
+      .map(word => word.toLowerCase().replace(/[^a-z0-9]/g, ''))
+      .filter(word => word.length > 2);
+
+    const wordsWithoutStopwords = removeStopwords(cleanWords);
+
+    // Count word frequency
+    const wordFrequency: Record<string, number> = {};
+    wordsWithoutStopwords.forEach(word => {
+      wordFrequency[word] = (wordFrequency[word] || 0) + 1;
+    });
+
+    // Get top keywords
+    const topKeywords = Object.entries(wordFrequency)
+      .sort((a, b) => b[1] - a[1])
+      .slice(0, 20)
+      .map(([word, count]) => ({
+        word,
+        count,
+        density: ((count / wordCount) * 100).toFixed(2) + '%',
+      }));
+
+    // Analyze paragraphs
+    const paragraphs = $('p').length;
+    const avgWordsPerParagraph = paragraphs > 0 ? Math.round(wordCount / paragraphs) : 0;
+
+    // Analyze images
+    const totalImages = $('img').length;
+    const imagesWithAlt = $('img[alt]').filter((_, el) => $(el).attr('alt')?.trim()).length;
+    const imagesWithoutAlt = totalImages - imagesWithAlt;
+
+    // Analyze links
+    const totalLinks = $('a[href]').length;
+    const baseUrl = new URL(url);
+    let internalLinks = 0;
+    let externalLinks = 0;
+
+    $('a[href]').each((_, el) => {
+      const href = $(el).attr('href');
+      if (href) {
+        try {
+          const linkUrl = new URL(href, url);
+          if (linkUrl.hostname === baseUrl.hostname) {
+            internalLinks++;
+          } else {
+            externalLinks++;
+          }
+        } catch {
+          // Invalid URL
+        }
+      }
+    });
+
+    // Reading time estimate (average 200 words per minute)
+    const readingTimeMinutes = Math.ceil(wordCount / 200);
+
+    // SEO recommendations
+    const recommendations = [];
+    if (headingCounts.h1 === 0) {
+      recommendations.push('Add an H1 heading to your page');
+    } else if (headingCounts.h1 > 1) {
+      recommendations.push('Consider using only one H1 heading per page');
+    }
+    if (wordCount < 300) {
+      recommendations.push('Content is quite short. Consider adding more content (aim for 300+ words)');
+    }
+    if (imagesWithoutAlt > 0) {
+      recommendations.push(`${imagesWithoutAlt} image(s) missing alt text. Add alt text for better SEO and accessibility`);
+    }
+    if (topKeywords.length === 0) {
+      recommendations.push('No significant keywords found. Add more relevant content');
+    }
+
+    return NextResponse.json({
+      url,
+      headingStructure,
+      headingCounts,
+      content: {
+        wordCount,
+        characterCount,
+        characterCountNoSpaces,
+        sentenceCount,
+        paragraphCount: paragraphs,
+        avgWordsPerSentence,
+        avgWordsPerParagraph,
+        readingTimeMinutes,
+      },
+      keywords: topKeywords,
+      images: {
+        total: totalImages,
+        withAlt: imagesWithAlt,
+        withoutAlt: imagesWithoutAlt,
+      },
+      links: {
+        total: totalLinks,
+        internal: internalLinks,
+        external: externalLinks,
+      },
+      recommendations,
+    });
+  } catch (error: any) {
+    console.error('Content analysis error:', error);
+    return NextResponse.json(
+      { error: error.message || 'Failed to analyze content' },
+      { status: 500 }
+    );
+  }
+}