Evernote Cost Tuning

Overview

Optimize resource usage and manage costs in Evernote integrations, focusing on upload quotas, storage efficiency, and account limits.

Prerequisites

• Understanding of Evernote account tiers
• Access to user quota information
• Monitoring infrastructure

Account Limits by Tier

Feature	Basic	Personal	Professional
Monthly upload	60 MB	10 GB	20 GB
Max note size	25 MB	200 MB	200 MB
Notebooks	250	1,000	1,000
Tags	100,000	100,000	100,000
Saved searches	100	100	100

Instructions

Step 1: Quota Monitoring

// services/quota-service.js
const Evernote = require('evernote');

class QuotaService {
  constructor(userStore) {
    this.userStore = userStore;
  }

  /**
   * Get current quota status
   */
  async getQuotaStatus() {
    const user = await this.userStore.getUser();
    const accounting = user.accounting;

    const uploadLimit = accounting.uploadLimit;
    const uploaded = accounting.uploaded;
    const remaining = uploadLimit - uploaded;
    const usagePercent = (uploaded / uploadLimit) * 100;

    return {
      tier: this.getTierName(user.privilege),
      uploadLimit: this.formatBytes(uploadLimit),
      uploaded: this.formatBytes(uploaded),
      remaining: this.formatBytes(remaining),
      usagePercent: usagePercent.toFixed(1) + '%',
      resetsAt: new Date(accounting.uploadLimitEnd),
      daysUntilReset: this.daysUntil(accounting.uploadLimitEnd),

      // Raw values for calculations
      raw: {
        uploadLimit,
        uploaded,
        remaining
      }
    };
  }

  /**
   * Check if upload is safe
   */
  async canUpload(fileSizeBytes) {
    const status = await this.getQuotaStatus();
    return status.raw.remaining >= fileSizeBytes;
  }

  /**
   * Estimate uploads remaining
   */
  async estimateRemainingUploads(avgFileSizeBytes) {
    const status = await this.getQuotaStatus();
    return Math.floor(status.raw.remaining / avgFileSizeBytes);
  }

  /**
   * Check if approaching limit
   */
  async isApproachingLimit(thresholdPercent = 80) {
    const status = await this.getQuotaStatus();
    return parseFloat(status.usagePercent) >= thresholdPercent;
  }

  getTierName(privilege) {
    const tiers = {
      1: 'Basic',
      2: 'Personal (Premium)',
      3: 'VIP',
      5: 'Professional'
    };
    return tiers[privilege] || 'Unknown';
  }

  formatBytes(bytes) {
    if (!bytes) return '0 B';
    const units = ['B', 'KB', 'MB', 'GB'];
    let i = 0;
    while (bytes >= 1024 && i < units.length - 1) {
      bytes /= 1024;
      i++;
    }
    return `${bytes.toFixed(2)} ${units[i]}`;
  }

  daysUntil(timestamp) {
    const ms = timestamp - Date.now();
    return Math.max(0, Math.ceil(ms / (24 * 60 * 60 * 1000)));
  }
}

module.exports = QuotaService;

Step 2: Resource Optimization

// services/resource-optimizer.js
const sharp = require('sharp');
const path = require('path');

class ResourceOptimizer {
  constructor(options = {}) {
    this.maxImageWidth = options.maxImageWidth || 1920;
    this.maxImageHeight = options.maxImageHeight || 1080;
    this.imageQuality = options.imageQuality || 80;
    this.maxFileSizeMB = options.maxFileSizeMB || 10;
  }

  /**
   * Optimize image before upload
   */
  async optimizeImage(buffer, originalName) {
    const originalSize = buffer.length;

    // Determine format
    const ext = path.extname(originalName).toLowerCase();
    const format = ext === '.png' ? 'png' : 'jpeg';

    // Resize and compress
    let optimized = sharp(buffer)
      .resize(this.maxImageWidth, this.maxImageHeight, {
        fit: 'inside',
        withoutEnlargement: true
      });

    if (format === 'jpeg') {
      optimized = optimized.jpeg({ quality: this.imageQuality });
    } else {
      optimized = optimized.png({ compressionLevel: 9 });
    }

    const result = await optimized.toBuffer();
    const savings = originalSize - result.length;
    const savingsPercent = (savings / originalSize) * 100;

    console.log(`Image optimized: ${this.formatBytes(savings)} saved (${savingsPercent.toFixed(1)}%)`);

    return {
      buffer: result,
      originalSize,
      optimizedSize: result.length,
      savings,
      savingsPercent
    };
  }

  /**
   * Estimate if file needs optimization
   */
  shouldOptimize(fileSizeBytes, mimeType) {
    // Images over 500KB should be optimized
    if (mimeType.startsWith('image/') && fileSizeBytes > 500 * 1024) {
      return true;
    }

    // Files over max size must be optimized
    if (fileSizeBytes > this.maxFileSizeMB * 1024 * 1024) {
      return true;
    }

    return false;
  }

  /**
   * Compress PDF
   */
  async compressPDF(buffer) {
    // Requires external tool like ghostscript
    // This is a placeholder - implement based on your needs
    return buffer;
  }

  formatBytes(bytes) {
    const units = ['B', 'KB', 'MB'];
    let i = 0;
    while (bytes >= 1024 && i < units.length - 1) {
      bytes /= 1024;
      i++;
    }
    return `${bytes.toFixed(2)} ${units[i]}`;
  }
}

module.exports = ResourceOptimizer;

Step 3: Efficient Note Creation

// services/efficient-note-service.js

class EfficientNoteService {
  constructor(noteStore, quotaService, optimizer) {
    this.noteStore = noteStore;
    this.quota = quotaService;
    this.optimizer = optimizer;
  }

  /**
   * Create note with size checking
   */
  async createNoteWithQuotaCheck(note, resources = []) {
    // Calculate total size
    let totalSize = Buffer.byteLength(note.content, 'utf8');
    for (const resource of resources) {
      totalSize += resource.data.size;
    }

    // Check quota
    const canUpload = await this.quota.canUpload(totalSize);
    if (!canUpload) {
      const status = await this.quota.getQuotaStatus();
      throw new Error(
        `Insufficient quota. Need ${this.formatBytes(totalSize)}, ` +
        `have ${status.remaining}. Resets in ${status.daysUntilReset} days.`
      );
    }

    // Optimize resources if needed
    const optimizedResources = [];
    for (const resource of resources) {
      if (this.optimizer.shouldOptimize(resource.data.size, resource.mime)) {
        const optimized = await this.optimizer.optimizeImage(
          resource.data.body,
          resource.attributes?.fileName || 'image'
        );
        resource.data.body = optimized.buffer;
        resource.data.size = optimized.buffer.length;
        resource.data.bodyHash = this.computeHash(optimized.buffer);
      }
      optimizedResources.push(resource);
    }

    note.resources = optimizedResources;
    return this.noteStore.createNote(note);
  }

  /**
   * Create note with deferred resources
   */
  async createNoteDeferResources(title, content, resourcePaths) {
    // Create note without resources first
    const note = new Evernote.Types.Note();
    note.title = title;
    note.content = this.wrapENML(content);

    const created = await this.noteStore.createNote(note);

    // Add resources in background
    for (const resourcePath of resourcePaths) {
      await this.addResourceToNote(created.guid, resourcePath);
    }

    return created;
  }

  /**
   * Batch small notes together
   */
  async createNotesEfficiently(notes) {
    // Sort by size (smallest first)
    notes.sort((a, b) => {
      const sizeA = Buffer.byteLength(a.content, 'utf8');
      const sizeB = Buffer.byteLength(b.content, 'utf8');
      return sizeA - sizeB;
    });

    const results = [];
    const status = await this.quota.getQuotaStatus();
    let usedQuota = 0;

    for (const note of notes) {
      const noteSize = Buffer.byteLength(note.content, 'utf8');

      if (usedQuota + noteSize > status.raw.remaining) {
        console.warn(`Quota limit reached. ${notes.length - results.length} notes skipped.`);
        break;
      }

      try {
        const result = await this.noteStore.createNote(note);
        results.push({ success: true, note: result });
        usedQuota += noteSize;
      } catch (error) {
        results.push({ success: false, error: error.message });
      }
    }

    return results;
  }

  computeHash(buffer) {
    const crypto = require('crypto');
    return crypto.createHash('md5').update(buffer).digest();
  }

  wrapENML(content) {
    return `<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE en-note SYSTEM "http://xml.evernote.com/pub/enml2.dtd">
<en-note>${content}</en-note>`;
  }

  formatBytes(bytes) {
    const units = ['B', 'KB', 'MB'];
    let i = 0;
    while (bytes >= 1024 && i < units.length - 1) {
      bytes /= 1024;
      i++;
    }
    return `${bytes.toFixed(2)} ${units[i]}`;
  }
}

module.exports = EfficientNoteService;

Step 4: Storage Cleanup

// services/storage-cleanup.js

class StorageCleanup {
  constructor(noteStore) {
    this.noteStore = noteStore;
  }

  /**
   * Find large notes
   */
  async findLargeNotes(thresholdMB = 5) {
    const filter = new Evernote.NoteStore.NoteFilter({
      ascending: false,
      order: Evernote.Types.NoteSortOrder.SIZE
    });

    const spec = new Evernote.NoteStore.NotesMetadataResultSpec({
      includeTitle: true,
      includeContentLength: true,
      includeCreated: true,
      includeNotebookGuid: true
    });

    const result = await this.noteStore.findNotesMetadata(filter, 0, 100, spec);

    const thresholdBytes = thresholdMB * 1024 * 1024;
    return result.notes.filter(note =>
      note.contentLength > thresholdBytes
    );
  }

  /**
   * Find duplicate notes (by title)
   */
  async findPotentialDuplicates() {
    const spec = new Evernote.NoteStore.NotesMetadataResultSpec({
      includeTitle: true,
      includeCreated: true,
      includeContentLength: true
    });

    const filter = new Evernote.NoteStore.NoteFilter({});
    const all = await this.noteStore.findNotesMetadata(filter, 0, 1000, spec);

    // Group by title
    const byTitle = {};
    for (const note of all.notes) {
      const key = note.title.toLowerCase().trim();
      if (!byTitle[key]) {
        byTitle[key] = [];
      }
      byTitle[key].push(note);
    }

    // Find duplicates
    const duplicates = [];
    for (const [title, notes] of Object.entries(byTitle)) {
      if (notes.length > 1) {
        duplicates.push({
          title,
          count: notes.length,
          notes: notes.map(n => ({
            guid: n.guid,
            created: new Date(n.created),
            size: this.formatBytes(n.contentLength)
          }))
        });
      }
    }

    return duplicates;
  }

  /**
   * Find old, unmodified notes
   */
  async findStaleNotes(daysOld = 365) {
    const cutoff = Date.now() - (daysOld * 24 * 60 * 60 * 1000);

    const filter = new Evernote.NoteStore.NoteFilter({
      ascending: true,
      order: Evernote.Types.NoteSortOrder.UPDATED
    });

    const spec = new Evernote.NoteStore.NotesMetadataResultSpec({
      includeTitle: true,
      includeUpdated: true,
      includeContentLength: true
    });

    const result = await this.noteStore.findNotesMetadata(filter, 0, 100, spec);

    return result.notes.filter(note => note.updated < cutoff);
  }

  /**
   * Calculate storage by notebook
   */
  async getStorageByNotebook() {
    const notebooks = await this.noteStore.listNotebooks();
    const storage = [];

    for (const notebook of notebooks) {
      const filter = new Evernote.NoteStore.NoteFilter({
        notebookGuid: notebook.guid
      });

      const spec = new Evernote.NoteStore.NotesMetadataResultSpec({
        includeContentLength: true
      });

      const result = await this.noteStore.findNotesMetadata(filter, 0, 1, spec);

      // Estimate total size (would need to paginate for accuracy)
      const avgSize = result.notes[0]?.contentLength || 0;
      const estimatedTotal = avgSize * result.totalNotes;

      storage.push({
        name: notebook.name,
        guid: notebook.guid,
        noteCount: result.totalNotes,
        estimatedSize: this.formatBytes(estimatedTotal)
      });
    }

    return storage.sort((a, b) => b.noteCount - a.noteCount);
  }

  formatBytes(bytes) {
    const units = ['B', 'KB', 'MB', 'GB'];
    let i = 0;
    while (bytes >= 1024 && i < units.length - 1) {
      bytes /= 1024;
      i++;
    }
    return `${bytes.toFixed(2)} ${units[i]}`;
  }
}

module.exports = StorageCleanup;

Step 5: Quota Alerts

// services/quota-alerts.js

class QuotaAlertService {
  constructor(quotaService, options = {}) {
    this.quota = quotaService;
    this.thresholds = {
      warning: options.warningPercent || 70,
      critical: options.criticalPercent || 90
    };
    this.alertHandlers = [];
  }

  /**
   * Register alert handler
   */
  onAlert(handler) {
    this.alertHandlers.push(handler);
  }

  /**
   * Check and alert
   */
  async checkAndAlert() {
    const status = await this.quota.getQuotaStatus();
    const usagePercent = parseFloat(status.usagePercent);

    if (usagePercent >= this.thresholds.critical) {
      await this.sendAlert('critical', status);
    } else if (usagePercent >= this.thresholds.warning) {
      await this.sendAlert('warning', status);
    }

    return status;
  }

  /**
   * Send alert to handlers
   */
  async sendAlert(level, status) {
    const alert = {
      level,
      message: this.formatAlertMessage(level, status),
      status,
      timestamp: new Date()
    };

    for (const handler of this.alertHandlers) {
      try {
        await handler(alert);
      } catch (error) {
        console.error('Alert handler error:', error);
      }
    }
  }

  formatAlertMessage(level, status) {
    const emoji = level === 'critical' ? '' : '';
    return `${emoji} Evernote quota ${level.toUpperCase()}: ` +
           `${status.usagePercent} used (${status.uploaded} / ${status.uploadLimit}). ` +
           `Resets in ${status.daysUntilReset} days.`;
  }
}

// Usage example
const alertService = new QuotaAlertService(quotaService);

// Email alert
alertService.onAlert(async (alert) => {
  await sendEmail({
    to: 'admin@example.com',
    subject: `Evernote Quota ${alert.level}`,
    body: alert.message
  });
});

// Slack alert
alertService.onAlert(async (alert) => {
  await slack.send({
    channel: '#alerts',
    text: alert.message
  });
});

module.exports = QuotaAlertService;

Step 6: Usage Report

// scripts/quota-report.js

async function generateQuotaReport(quotaService, cleanupService) {
  console.log('=== Evernote Quota Report ===\n');

  // Current status
  const status = await quotaService.getQuotaStatus();
  console.log('Account Tier:', status.tier);
  console.log('Upload Quota:', `${status.uploaded} / ${status.uploadLimit} (${status.usagePercent})`);
  console.log('Remaining:', status.remaining);
  console.log('Resets:', status.resetsAt.toLocaleDateString(), `(${status.daysUntilReset} days)`);

  // Large notes
  console.log('\n--- Large Notes (>5MB) ---');
  const largeNotes = await cleanupService.findLargeNotes(5);
  if (largeNotes.length > 0) {
    largeNotes.forEach(note => {
      console.log(`- ${note.title}: ${cleanupService.formatBytes(note.contentLength)}`);
    });
    console.log(`Total: ${largeNotes.length} notes`);
  } else {
    console.log('No large notes found');
  }

  // Storage by notebook
  console.log('\n--- Storage by Notebook ---');
  const storage = await cleanupService.getStorageByNotebook();
  storage.slice(0, 10).forEach(nb => {
    console.log(`- ${nb.name}: ${nb.noteCount} notes (~${nb.estimatedSize})`);
  });

  // Recommendations
  console.log('\n--- Recommendations ---');
  const usagePercent = parseFloat(status.usagePercent);

  if (usagePercent > 80) {
    console.log('- Consider upgrading account tier');
    console.log('- Optimize images before upload');
    console.log('- Archive old notes to external storage');
  }

  if (largeNotes.length > 10) {
    console.log('- Review and compress large notes');
    console.log('- Consider moving attachments to cloud storage');
  }

  console.log('\n=== End Report ===');
}

Output

• Quota monitoring service
• Image and resource optimization
• Efficient note creation with quota checking
• Storage cleanup utilities
• Alert system for quota thresholds
• Usage reporting

Cost Optimization Checklist

## Monthly Checklist

- [ ] Check quota usage status
- [ ] Review large notes (>5MB)
- [ ] Find and merge duplicates
- [ ] Archive stale notes
- [ ] Optimize images in queue
- [ ] Set up quota alerts

Resources

• Account Limits
• Rate Limits
• Quota Information

Next Steps

For architecture patterns, see

evernote-reference-architecture

.