gitlify/src/formatter.js

A powerful CLI tool to analyze uncommitted git changes with detailed reports, function detection, and beautiful terminal output

const termcolorized = require('termcolorized');

class Formatter {
  display(files, options = {}) {
    if (options.json) {
      this.displayJson(files);
    } else if (options.files) {
      this.displayFilesOnly(files);
    } else if (options.summary) {
      this.displaySummary(files);
    } else {
      this.displayFull(files, options.verbose);
    }
  }

  displayFull(files, verbose = false) {
    if (files.length === 0) {
      console.log(termcolorized.info('✨ No changes found.'));
      return;
    }

    // Sort files by total changes (additions + deletions)
    const sortedFiles = files.sort((a, b) => 
      (b.totalAdditions + b.totalDeletions) - (a.totalAdditions + a.totalDeletions)
    );

    // Display each file
    for (const file of sortedFiles) {
      this.displayFile(file, verbose);
    }

    // Display summary
    this.displaySummary(files);
  }

  displayFile(file, verbose = false) {
    const totalChanges = file.totalAdditions + file.totalDeletions;
    
    // File header
    console.log(termcolorized.style(`📁 ${file.filePath}`, { 
      color: '#3498db', 
      bold: true 
    }));

    // Changes summary
    const additionsText = file.totalAdditions > 0 ? 
      termcolorized.style(`➕ ${file.totalAdditions} additions`, { color: '#27ae60' }) : '';
    const deletionsText = file.totalDeletions > 0 ? 
      termcolorized.style(`➖ ${file.totalDeletions} deletions`, { color: '#e74c3c' }) : '';
    
    if (additionsText && deletionsText) {
      console.log(`  ${additionsText} ${deletionsText}`);
    } else if (additionsText) {
      console.log(`  ${additionsText}`);
    } else if (deletionsText) {
      console.log(`  ${deletionsText}`);
    }

    // Function information
    if (file.changedFunctions && file.changedFunctions.length > 0) {
      const functionNames = file.changedFunctions.map(f => f.name).join(', ');
      console.log(termcolorized.style(`  📌 Changed in: ${functionNames}()`, { 
        color: '#f39c12' 
      }));
    }

    // Line numbers (verbose mode)
    if (verbose && file.changedLines.length > 0) {
      const lineNumbers = file.changedLines.map(line => line.lineNumber);
      const minLine = Math.min(...lineNumbers);
      const maxLine = Math.max(...lineNumbers);
      console.log(termcolorized.style(`  📍 Lines: ${minLine}-${maxLine}`, { 
        color: '#9b59b6' 
      }));
    }

    console.log(); // Empty line for spacing
  }

  displaySummary(files) {
    if (files.length === 0) return;

    const totalFiles = files.length;
    const totalAdditions = files.reduce((sum, file) => sum + file.totalAdditions, 0);
    const totalDeletions = files.reduce((sum, file) => sum + file.totalDeletions, 0);
    const totalChanges = totalAdditions + totalDeletions;

    // Find most changed file
    const mostChangedFile = files.reduce((max, file) => {
      const fileChanges = file.totalAdditions + file.totalDeletions;
      const maxChanges = max.totalAdditions + max.totalDeletions;
      return fileChanges > maxChanges ? file : max;
    });

    console.log(termcolorized.style('🧾 Summary:', { 
      color: '#2c3e50', 
      bold: true 
    }));
    console.log(termcolorized.style(`  - Total files changed: ${totalFiles}`, { 
      color: '#34495e' 
    }));
    console.log(termcolorized.style(`  - Total lines added: ${totalAdditions}`, { 
      color: '#27ae60' 
    }));
    console.log(termcolorized.style(`  - Total lines removed: ${totalDeletions}`, { 
      color: '#e74c3c' 
    }));
    
    if (files.length > 1) {
      const mostChangedChanges = mostChangedFile.totalAdditions + mostChangedFile.totalDeletions;
      console.log(termcolorized.style(`  - Most changed file: ${mostChangedFile.filePath} (${mostChangedChanges} changes)`, { 
        color: '#f39c12' 
      }));
    }
  }

  displayFilesOnly(files) {
    if (files.length === 0) {
      console.log(termcolorized.info('No files changed.'));
      return;
    }

    console.log(termcolorized.style('📁 Changed Files:', { 
      color: '#3498db', 
      bold: true 
    }));
    
    for (const file of files) {
      const changes = file.totalAdditions + file.totalDeletions;
      console.log(termcolorized.style(`  ${file.filePath} (${changes} changes)`, { 
        color: '#34495e' 
      }));
    }
  }

  displayJson(files) {
    const result = {
      files: files.map(file => ({
        filePath: file.filePath,
        totalAdditions: file.totalAdditions,
        totalDeletions: file.totalDeletions,
        changedFunctions: file.changedFunctions.map(f => f.name),
        changedLines: file.changedLines.length
      })),
      summary: {
        totalFiles: files.length,
        totalAdditions: files.reduce((sum, file) => sum + file.totalAdditions, 0),
        totalDeletions: files.reduce((sum, file) => sum + file.totalDeletions, 0)
      }
    };

    console.log(JSON.stringify(result, null, 2));
  }
}

module.exports = Formatter;