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* Component Analysis Tools
* Analyzes component structure, performance, and best practices
*/
import { readFileSync, existsSync } from 'fs';
import { resolve } from 'path';
import { glob } from 'glob';
export async function analyzeComponent(options = {}) {
const analysis = {
timestamp: new Date().toISOString(),
type: 'component-analysis',
summary: {},
components: [],
issues: [],
recommendations: []
};
try {
// Determine what to analyze
if (options.file) {
// Analyze specific file
const component = await analyzeComponentFile(options.file, options);
analysis.components = [component];
} else if (options.componentName) {
// Find and analyze specific component by name
const componentFile = await findComponentByName(options.componentName);
if (componentFile) {
const component = await analyzeComponentFile(componentFile, options);
analysis.components = [component];
} else {
analysis.issues.push({
type: 'not-found',
message: `Component "${options.componentName}" not found`,
suggestion: 'Check component name spelling or file location'
});
}
} else {
// Analyze all components in project
const componentFiles = await findAllComponents();
analysis.components = await Promise.all(
componentFiles.map(file => analyzeComponentFile(file, options))
);
}
// Generate summary
analysis.summary = generateComponentSummary(analysis.components);
// Generate recommendations
analysis.recommendations = generateComponentRecommendations(analysis.components);
} catch (error) {
analysis.summary.status = 'error';
analysis.summary.error = error.message;
analysis.issues.push({
type: 'analysis-error',
message: `Failed to analyze components: ${error.message}`,
suggestion: 'Check that component files are valid JavaScript'
});
}
return analysis;
}
async function findAllComponents() {
const patterns = [
'src/**/*.component.js',
'src/**/*Component.js',
'src/components/**/*.js',
'components/**/*.js',
'src/**/*.jsx', // In case they're using JSX syntax
'components/**/*.jsx'
];
const files = [];
for (const pattern of patterns) {
try {
const matches = await glob(pattern, { ignore: ['**/node_modules/**', '**/test/**', '**/*.test.*'] });
files.push(...matches);
} catch {
// Continue if pattern fails
}
}
return [...new Set(files)]; // Remove duplicates
}
async function findComponentByName(componentName) {
const possibleFiles = [
`src/components/${componentName}.js`,
`src/components/${componentName}/${componentName}.js`,
`components/${componentName}.js`,
`components/${componentName}/${componentName}.js`,
`src/${componentName}.component.js`,
`src/${componentName}Component.js`
];
for (const file of possibleFiles) {
if (existsSync(resolve(file))) {
return file;
}
}
// Try glob search
const patterns = [
`**/${componentName}.js`,
`**/${componentName}*.js`,
`**/*${componentName}*.js`
];
for (const pattern of patterns) {
try {
const matches = await glob(pattern, { ignore: ['**/node_modules/**'] });
if (matches.length > 0) {
return matches[0];
}
} catch {
// Continue searching
}
}
return null;
}
async function analyzeComponentFile(filePath, _options = {}) {
const analysis = {
file: filePath,
name: extractComponentName(filePath),
size: 0,
lines: 0,
complexity: 'unknown',
issues: [],
metrics: {},
suggestions: []
};
try {
if (!existsSync(resolve(filePath))) {
analysis.issues.push({
type: 'file-not-found',
message: `File not found: ${filePath}`
});
return analysis;
}
const content = readFileSync(resolve(filePath), 'utf-8');
analysis.size = Buffer.byteLength(content, 'utf8');
analysis.lines = content.split('\n').length;
// Basic syntax analysis
const syntaxAnalysis = analyzeSyntax(content, filePath);
analysis.metrics = { ...analysis.metrics, ...syntaxAnalysis };
// Complexity analysis
analysis.complexity = calculateComplexity(content);
// Performance analysis
const perfAnalysis = analyzePerformancePatterns(content);
analysis.suggestions.push(...perfAnalysis.suggestions);
// Best practices check
const practicesAnalysis = checkBestPractices(content, filePath);
analysis.suggestions.push(...practicesAnalysis.suggestions);
analysis.issues.push(...practicesAnalysis.issues);
// Component structure validation
const structureAnalysis = validateComponentStructure(content);
analysis.issues.push(...structureAnalysis.issues);
analysis.suggestions.push(...structureAnalysis.suggestions);
} catch (error) {
analysis.issues.push({
type: 'analysis-error',
message: `Failed to analyze ${filePath}: ${error.message}`
});
}
return analysis;
}
function extractComponentName(filePath) {
const fileName = filePath.split('/').pop().split('.')[0];
return fileName
.replace(/component$/i, '')
.replace(/Component$/, '')
.replace(/[-_]/g, '')
|| 'UnknownComponent';
}
function analyzeSyntax(content, _filePath) {
const metrics = {
functions: 0,
exports: 0,
imports: 0,
hasDefaultExport: false,
usesModernSyntax: false
};
// Count functions
metrics.functions = (content.match(/function\s+\w+|const\s+\w+\s*=\s*\(/g) || []).length;
// Count exports
metrics.exports = (content.match(/export\s+(default\s+)?/g) || []).length;
metrics.hasDefaultExport = /export\s+default/.test(content);
// Count imports
metrics.imports = (content.match(/import\s+.*from/g) || []).length;
// Check for modern syntax
metrics.usesModernSyntax = /const\s+|let\s+|arrow functions|\.\.\.|async\s+|await\s+/.test(content);
// Check for Coherent.js patterns
metrics.usesCoherentPatterns = /renderToString|withState|memo/.test(content);
return metrics;
}
function calculateComplexity(content) {
// Simple complexity calculation based on control structures
const complexityPatterns = [
/if\s*\(/g,
/else\s+if\s*\(/g,
/for\s*\(/g,
/while\s*\(/g,
/switch\s*\(/g,
/catch\s*\(/g,
/\?\s*.*:/g, // Ternary operators
];
let totalComplexity = 1; // Base complexity
complexityPatterns.forEach(pattern => {
const matches = content.match(pattern);
if (matches) {
totalComplexity += matches.length;
}
});
if (totalComplexity <= 5) return 'low';
if (totalComplexity <= 10) return 'medium';
if (totalComplexity <= 20) return 'high';
return 'very-high';
}
function analyzePerformancePatterns(content) {
const suggestions = [];
// Check for expensive operations
if (/JSON\.(parse|stringify)/g.test(content)) {
suggestions.push({
type: 'performance',
priority: 'medium',
message: 'JSON operations detected. Consider memoization for expensive serialization.'
});
}
// Check for large data structures
if (/new Array\(\d{4,}\)|\.length\s*>\s*\d{4,}/.test(content)) {
suggestions.push({
type: 'performance',
priority: 'high',
message: 'Large arrays detected. Consider pagination or virtualization.'
});
}
// Check for nested loops
const nestedLoops = content.match(/for\s*\([^}]*for\s*\(|while\s*\([^}]*while\s*\(/g);
if (nestedLoops && nestedLoops.length > 0) {
suggestions.push({
type: 'performance',
priority: 'high',
message: 'Nested loops detected. Consider optimizing algorithm complexity.'
});
}
// Check for missing memoization
if (!/memo\(/.test(content) && content.includes('function') && content.length > 500) {
suggestions.push({
type: 'performance',
priority: 'medium',
message: 'Large component without memoization. Consider using memo() wrapper.'
});
}
return { suggestions };
}
function checkBestPractices(content, filePath) {
const suggestions = [];
const issues = [];
// Check for proper error handling
if (content.includes('try') && !content.includes('catch')) {
issues.push({
type: 'best-practice',
message: 'Try block found without catch. Add proper error handling.'
});
}
// Check for console.log statements (should be removed in production)
const consoleLogs = content.match(/console\.log\(/g);
if (consoleLogs && consoleLogs.length > 2) {
suggestions.push({
type: 'best-practice',
priority: 'low',
message: `${consoleLogs.length} console.log statements found. Remove before production.`
});
}
// Check for proper component naming
const fileName = extractComponentName(filePath);
if (fileName.toLowerCase() === fileName) {
suggestions.push({
type: 'best-practice',
priority: 'low',
message: 'Component name should use PascalCase convention.'
});
}
// Check for inline styles (should be minimal)
const inlineStyles = content.match(/style\s*:\s*['"`]/g);
if (inlineStyles && inlineStyles.length > 3) {
suggestions.push({
type: 'best-practice',
priority: 'medium',
message: 'Many inline styles detected. Consider using CSS classes or styled components.'
});
}
// Check for proper prop validation
if (content.includes('props') && !/typeof\s+props/.test(content)) {
suggestions.push({
type: 'best-practice',
priority: 'medium',
message: 'Consider adding prop type validation for better debugging.'
});
}
return { suggestions, issues };
}
function validateComponentStructure(content) {
const issues = [];
const suggestions = [];
// Check for valid Coherent.js component structure
const hasValidReturn = /return\s*\{/.test(content) || /=>\s*\{/.test(content);
if (!hasValidReturn && content.includes('function')) {
issues.push({
type: 'structure',
message: 'Component should return a valid object structure.'
});
}
// Check for proper HTML tag usage
const htmlTags = content.match(/['"]\w+['"]:\s*\{/g);
if (htmlTags) {
const validTags = ['div', 'span', 'p', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'a', 'button', 'input', 'form', 'ul', 'li', 'img'];
htmlTags.forEach(tag => {
const tagName = tag.match(/['"'](\w+)['"']/)[1];
if (!validTags.includes(tagName) && !tagName.match(/^[A-Z]/)) {
suggestions.push({
type: 'structure',
priority: 'low',
message: `Consider using standard HTML tags. Found: ${tagName}`
});
}
});
}
// Check for proper children handling
if (content.includes('children') && !content.includes('Array.isArray')) {
suggestions.push({
type: 'structure',
priority: 'medium',
message: 'Consider validating children prop type (should handle arrays and single elements).'
});
}
return { issues, suggestions };
}
function generateComponentSummary(components) {
const summary = {
status: 'success',
totalComponents: components.length,
averageSize: 0,
averageLines: 0,
complexityDistribution: { low: 0, medium: 0, high: 0, 'very-high': 0 },
totalIssues: 0,
totalSuggestions: 0
};
if (components.length === 0) {
summary.status = 'warning';
summary.message = 'No components found for analysis';
return summary;
}
// Calculate averages
const totalSize = components.reduce((sum, c) => sum + c.size, 0);
const totalLines = components.reduce((sum, c) => sum + c.lines, 0);
summary.averageSize = Math.round(totalSize / components.length);
summary.averageLines = Math.round(totalLines / components.length);
// Count complexity distribution
components.forEach(c => {
summary.complexityDistribution[c.complexity]++;
summary.totalIssues += c.issues.length;
summary.totalSuggestions += c.suggestions.length;
});
// Determine overall status
if (summary.totalIssues > components.length * 2) {
summary.status = 'warning';
summary.message = 'Many issues found across components';
} else if (summary.totalIssues === 0) {
summary.status = 'excellent';
summary.message = 'All components look great!';
}
return summary;
}
function generateComponentRecommendations(components) {
const recommendations = [];
// Large component recommendation
const largeComponents = components.filter(c => c.size > 10000); // 10KB+
if (largeComponents.length > 0) {
recommendations.push({
type: 'optimization',
priority: 'medium',
message: `${largeComponents.length} components are larger than 10KB. Consider splitting into smaller components.`
});
}
// High complexity recommendation
const complexComponents = components.filter(c => c.complexity === 'high' || c.complexity === 'very-high');
if (complexComponents.length > 0) {
recommendations.push({
type: 'refactoring',
priority: 'high',
message: `${complexComponents.length} components have high complexity. Consider refactoring for maintainability.`
});
}
// Performance recommendations
const componentsWithoutMemo = components.filter(c =>
c.size > 5000 && !c.metrics.usesCoherentPatterns
);
if (componentsWithoutMemo.length > 0) {
recommendations.push({
type: 'performance',
priority: 'medium',
message: `${componentsWithoutMemo.length} large components could benefit from memoization.`
});
}
// Best practices
const totalIssues = components.reduce((sum, c) => sum + c.issues.length, 0);
if (totalIssues > 0) {
recommendations.push({
type: 'best-practices',
priority: 'medium',
message: `${totalIssues} best practice violations found. Review component implementations.`
});
}
return recommendations;
} |