/**
* Feed Credibility Scoring Service
*/
export class CredibilityScorer {
/**
* Calculate overall credibility score for a feed
*/
static calculateScore(feed: any, metrics: {
httpsEnabled: boolean;
updateFrequency: number; // articles per day
metadataQuality: number; // 0-100
hasDescription: boolean;
hasImage: boolean;
}): number {
let score = 0;
// HTTPS adds 20 points
if (metrics.httpsEnabled) {
score += 20;
}
// Update frequency (max 30 points)
if (metrics.updateFrequency >= 10) {
score += 30;
} else if (metrics.updateFrequency >= 5) {
score += 20;
} else if (metrics.updateFrequency >= 1) {
score += 10;
}
// Metadata quality (max 30 points)
score += Math.min(30, metrics.metadataQuality * 0.3);
// Feed has description (10 points)
if (metrics.hasDescription) {
score += 10;
}
// Feed has image/logo (10 points)
if (metrics.hasImage) {
score += 10;
}
return Math.min(100, Math.round(score));
}
/**
* Assess metadata quality
*/
static assessMetadataQuality(feed: any): number {
let quality = 0;
if (feed.title && feed.title.length > 5) quality += 25;
if (feed.description && feed.description.length > 20) quality += 25;
if (feed.url) quality += 25;
if (feed.last_updated) quality += 25;
return quality;
}
/**
* Get credibility label
*/
static getLabel(score: number): string {
if (score >= 80) return 'Excellent';
if (score >= 60) return 'Good';
if (score >= 40) return 'Fair';
if (score >= 20) return 'Poor';
return 'Very Poor';
}
/**
* Get recommendations for improving credibility
*/
static getRecommendations(score: number, metrics: any): string[] {
const recommendations: string[] = [];
if (!metrics.httpsEnabled) {
recommendations.push('Enable HTTPS for secure connection');
}
if (metrics.updateFrequency < 1) {
recommendations.push('Increase update frequency');
}
if (metrics.metadataQuality < 75) {
recommendations.push('Improve feed metadata (title, description)');
}
if (!metrics.hasDescription) {
recommendations.push('Add feed description');
}
if (score < 50) {
recommendations.push('Consider verifying feed source authenticity');
}
return recommendations;
}
}
