Added thumbnails script

scripts/thumbnails.js

@@ -0,0 +1,66 @@
+// This script was made with help of ChatGPT and adjusted to correct working state.
+
+const fs = require('fs');
+const path = require('path');
+const sharp = require('sharp');
+
+hexo.extend.filter.register('after_init', async function() {
+    if (!hexo.theme.config.thumbnails) return; 
+    if ( (hexo.env.cmd !== 'generate') && (hexo.env.cmd !== 'g') ) return;
+
+    console.log('Generating thumbnails...');
+
+    const source = path.join(hexo.base_dir, 'source/images');
+    const thumbnails = path.join(hexo.base_dir, 'source/thumbnails');
+
+    if (!fs.existsSync(thumbnails)) {
+        fs.mkdirSync(thumbnails, { recursive: true });
+    }
+
+    // Thumbnail sizes
+    const sizes = [
+        { name: 'small', width: 333 },      // Three-column layout
+        { name: 'medium', width: 666 },     // Two-column layout
+        { name: 'large', width: 1000 }      // Normal post
+    ];
+
+    const getAllFilesInclSubfolders = (dir) => {
+        let results = [];
+        fs.readdirSync(dir).forEach(file => {
+            if (file === '.' || file === '..') return;
+            
+            const fullPath = path.join(dir, file);
+            if (fs.statSync(fullPath).isDirectory()) {
+                results = results.concat(getAllFilesInclSubfolders(fullPath));
+            } else {
+                results.push(fullPath);
+            }
+        });
+        return results;
+    };
+    
+    const imageFiles = getAllFilesInclSubfolders(source);
+    imageFiles.forEach(inputFile => {
+        const ext = path.extname(inputFile).toLowerCase();
+        if (['.jpg', '.jpeg', '.png', '.webp'].includes(ext)) {
+            sizes.forEach(size => {
+                // Maintain folder structure in thumbnails
+                const relativePath = path.relative(thumbnails, inputFile).replace(/^(\.\.\/)+images\//, '');
+
+                const outputFile = path.join(thumbnails, size.name + '-' + relativePath);
+                console.log(`PARTIAL: ${inputFile} - ${relativePath}`);
+    
+                // Ensure the output directory structure exists
+                fs.mkdirSync(path.dirname(outputFile), { recursive: true });
+    
+                if (!fs.existsSync(outputFile)) {
+                    sharp(inputFile)
+                        .resize(size.width)
+                        .toFile(outputFile)
+                        .then(() => console.log(`Generated: ${outputFile}`))
+                        .catch(err => console.error(`Error processing ${inputFile}:`, err));
+                }
+            });
+        }
+    });
+});