Add Channel Blacklist

// Add users to blacklist for content violations
async function handleContentViolation(channelId, channelType, violatingUsers, reason) {
    try {
        // Add to blacklist
        await addToBlacklist({
            channel_id: channelId,
            channel_type: channelType,
            uids: violatingUsers
        });
        
        // Log violation
        await logViolation({
            channel_id: channelId,
            channel_type: channelType,
            violating_users: violatingUsers,
            reason: reason,
            action: 'blacklisted',
            timestamp: new Date().toISOString()
        });
        
        // Notify users about blacklisting
        for (const userId of violatingUsers) {
            await notifyUser(userId, {
                type: 'blacklisted',
                channel_id: channelId,
                reason: reason,
                appeal_process: 'Contact administrators to appeal'
            });
        }
        
        console.log(`Added ${violatingUsers.length} users to blacklist for: ${reason}`);
    } catch (error) {
        console.error('Failed to handle content violation:', error);
    }
}

// Usage
await handleContentViolation(
    'group123', 
    2, 
    ['user456', 'user789'], 
    'Inappropriate content sharing'
);

// Automated spam detection and blacklisting
class SpamDetector {
    constructor(channelId, channelType) {
        this.channelId = channelId;
        this.channelType = channelType;
        this.messageHistory = new Map();
        this.spamThresholds = {
            messagesPerMinute: 10,
            duplicateMessages: 3,
            linkSpamCount: 5
        };
    }
    
    async analyzeMessage(userId, messageContent) {
        const now = Date.now();
        const userHistory = this.messageHistory.get(userId) || {
            messages: [],
            duplicates: new Map(),
            linkCount: 0
        };
        
        // Add current message
        userHistory.messages.push({
            content: messageContent,
            timestamp: now
        });
        
        // Clean old messages (older than 1 minute)
        userHistory.messages = userHistory.messages.filter(
            msg => now - msg.timestamp < 60000
        );
        
        // Check for spam patterns
        const spamDetected = this.detectSpamPatterns(userHistory, messageContent);
        
        if (spamDetected.isSpam) {
            await this.handleSpamUser(userId, spamDetected.reasons);
        }
        
        this.messageHistory.set(userId, userHistory);
    }
    
    detectSpamPatterns(userHistory, messageContent) {
        const reasons = [];
        
        // Check message frequency
        if (userHistory.messages.length > this.spamThresholds.messagesPerMinute) {
            reasons.push('High message frequency');
        }
        
        // Check for duplicate messages
        const duplicateCount = userHistory.messages.filter(
            msg => msg.content === messageContent
        ).length;
        
        if (duplicateCount > this.spamThresholds.duplicateMessages) {
            reasons.push('Duplicate message spam');
        }
        
        // Check for link spam
        const linkCount = (messageContent.match(/https?:\/\/\S+/g) || []).length;
        if (linkCount > 2) {
            userHistory.linkCount += linkCount;
            if (userHistory.linkCount > this.spamThresholds.linkSpamCount) {
                reasons.push('Link spam');
            }
        }
        
        return {
            isSpam: reasons.length > 0,
            reasons: reasons
        };
    }
    
    async handleSpamUser(userId, reasons) {
        try {
            // Add to blacklist
            await addToBlacklist({
                channel_id: this.channelId,
                channel_type: this.channelType,
                uids: [userId]
            });
            
            // Log spam incident
            await logSpamIncident({
                channel_id: this.channelId,
                user_id: userId,
                reasons: reasons,
                action: 'auto_blacklisted',
                timestamp: new Date().toISOString()
            });
            
            console.log(`Auto-blacklisted user ${userId} for spam: ${reasons.join(', ')}`);
        } catch (error) {
            console.error(`Failed to blacklist spam user ${userId}:`, error);
        }
    }
}

// Usage
const spamDetector = new SpamDetector('group123', 2);

// Analyze incoming messages
await spamDetector.analyzeMessage('user456', 'Buy now! Click here: http://spam.com');

// Comprehensive moderation system
class ChannelModerator {
    constructor(channelId, channelType) {
        this.channelId = channelId;
        this.channelType = channelType;
        this.moderationRules = {
            profanityFilter: true,
            linkRestriction: true,
            capsLockLimit: 0.7, // 70% caps lock threshold
            mentionSpamLimit: 5
        };
    }
    
    async moderateUser(userId, violations) {
        const severity = this.calculateViolationSeverity(violations);
        
        switch (severity) {
            case 'low':
                await this.issueWarning(userId, violations);
                break;
            case 'medium':
                await this.temporaryRestriction(userId, violations);
                break;
            case 'high':
                await this.addToBlacklist(userId, violations);
                break;
        }
    }
    
    calculateViolationSeverity(violations) {
        const severityScores = {
            'profanity': 2,
            'spam': 3,
            'harassment': 4,
            'inappropriate_content': 3,
            'link_spam': 2,
            'caps_abuse': 1
        };
        
        const totalScore = violations.reduce((sum, violation) => 
            sum + (severityScores[violation.type] || 1), 0
        );
        
        if (totalScore >= 6) return 'high';
        if (totalScore >= 3) return 'medium';
        return 'low';
    }
    
    async addToBlacklist(userId, violations) {
        try {
            await addToBlacklist({
                channel_id: this.channelId,
                channel_type: this.channelType,
                uids: [userId]
            });
            
            // Create moderation record
            await createModerationRecord({
                channel_id: this.channelId,
                user_id: userId,
                action: 'blacklisted',
                violations: violations,
                moderator: 'system',
                timestamp: new Date().toISOString(),
                appeal_deadline: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000).toISOString()
            });
            
            // Notify user
            await notifyUser(userId, {
                type: 'blacklisted',
                channel_id: this.channelId,
                violations: violations,
                appeal_process: 'You can appeal this decision within 7 days'
            });
            
            console.log(`User ${userId} blacklisted for violations:`, violations);
        } catch (error) {
            console.error(`Failed to blacklist user ${userId}:`, error);
        }
    }
    
    async issueWarning(userId, violations) {
        await createModerationRecord({
            channel_id: this.channelId,
            user_id: userId,
            action: 'warning',
            violations: violations,
            moderator: 'system',
            timestamp: new Date().toISOString()
        });
        
        await notifyUser(userId, {
            type: 'warning',
            channel_id: this.channelId,
            violations: violations,
            message: 'Please follow channel guidelines'
        });
    }
    
    async temporaryRestriction(userId, violations) {
        // Implement temporary restriction logic
        // This might involve a separate temporary blacklist system
        console.log(`Temporary restriction for user ${userId}:`, violations);
    }
}

// Manage blacklists in bulk
async function bulkBlacklistManagement(operations) {
    const results = [];
    
    for (const operation of operations) {
        try {
            switch (operation.action) {
                case 'add':
                    await addToBlacklist({
                        channel_id: operation.channelId,
                        channel_type: operation.channelType,
                        uids: operation.userIds
                    });
                    break;
                    
                case 'remove':
                    await removeFromBlacklist({
                        channel_id: operation.channelId,
                        channel_type: operation.channelType,
                        uids: operation.userIds
                    });
                    break;
            }
            
            results.push({
                operation: operation,
                success: true
            });
        } catch (error) {
            results.push({
                operation: operation,
                success: false,
                error: error.message
            });
        }
    }
    
    return results;
}

// Usage
const operations = [
    {
        action: 'add',
        channelId: 'group123',
        channelType: 2,
        userIds: ['spammer1', 'spammer2'],
        reason: 'Spam detection'
    },
    {
        action: 'remove',
        channelId: 'group456',
        channelType: 2,
        userIds: ['reformed_user'],
        reason: 'Appeal approved'
    }
];

const results = await bulkBlacklistManagement(operations);
console.log('Bulk operation results:', results);