gmailCleanup

Code.gs

/ Cleanup emails.
//
// Create label ending with ;Na e.g. test;6m where Na is the age, N number 1,2,3.. etc a is d,m,w,y days,months,weekly,years 
// Starred emails and emails label as indef are not deleted.

function gmailCleanup() {
    function getDateBeforeToday(daysBefore) {
        let today = new Date();
        // Subtract the specified number of days
        today.setDate(today.getDate() - daysBefore);
        // Extract year, month, and day
        let year = today.getFullYear();
        let month = today.getMonth() + 1; // Months are zero-based
        let day = today.getDate();
        // Format month and day with leading zero if needed
        month = month < 10 ? '0' + month : month;
        day = day < 10 ? '0' + day : day;
        // Return the formatted date
        return `${year}/${month}/${day}`;
    }
    function translateDurationToDays(durationString) {
      const match = durationString.match(/^(\d+)([dwmy])$/); // Extract number and unit using regex

      if (!match) {
        Logger.log(`Invalid duration string: ${durationString}`); // Log invalid strings
        return null; 
      }

      const value = parseInt(match[1]); // Parse the number
      const unit = match[2]; // Get the unit (d, w, m, or y)

      switch (unit) {
        case 'd': // Days
          return value;
        case 'w': // Weeks, multiply by 7 days
          return value * 7;
        case 'm': // Months, approximate as 30 days per month
          return value * 30; 
        case 'y': // Years, approximate as 365 days per year
          return value * 365; 
        default:
          Logger.log(`Unknown duration unit: ${unit}`);
          return null;
      }
  }

    function autoTrash(emailLabel, emailAge) {    
        const labelInDef = 'indef'

        var threads;
        var counter = 0;
        var errors = 0;

        var query = `label:${emailLabel} before:${getDateBeforeToday(emailAge)} -is:starred -label:${labelInDef}`

        do {
            Logger.log(`Searching with query ${query}`)
            threads = GmailApp.search(query);
            if (threads.length > 0) {
                console.log('Found ' + threads.length + ' emails marked for deletion.');
                try {
                    let nextProgressMark = 20;

                    for (var i = 0; i < threads.length; i++) {
                        try {
                            threads[i].moveToTrash();
                            counter++;

                            const currentPercentage = Math.floor(((i + 1) / threads.length) * 100); 
                            if (currentPercentage >= nextProgressMark) {
                              Logger.log(`${nextProgressMark}% done this iteration. Total Processed ${counter} emails.`);
                              nextProgressMark += 20;
                            }
                        } catch (e) {
                            Logger.log(`Error moving thread to trash: ${threads[i].getFirstMessageSubject()}`);
                        }
                    }
                } catch (e) {
                    errors++;
                    console.error(`Could Not Complete Run: ${e}`);
                }
            } else {
                console.log('No emails marked for deletion. Exiting.');
            }
        } while (threads.length > 0);
        console.log(`100% done. Moved ${counter} emails to the trash with ${errors} errors.`);
  }
  
  const labels = GmailApp.getUserLabels(); // Get all user-created labels

  for (let i = 0; i < labels.length; i++) {
    const label = labels[i];
    const fullLabelName = label.getName();

    let labelName = ""; 
    let labelAge = "";

    if (fullLabelName.includes(';')) {
      const parts = fullLabelName.split(';');
      labelName = parts[0].trim(); 
      labelAge = parts[1].trim(); 
    } else {
      labelName = fullLabelName.trim(); 
      labelAge = null;
    }
    if(labelAge) {
      var labelDuration = translateDurationToDays(labelAge)
      Logger.log(`Processing label ${fullLabelName} age ${labelAge} duration ${labelDuration} days.`)
      autoTrash(fullLabelName, labelDuration)
    }
  }
}