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/** The name of the Gmail Label that is to be checked for purging */ |
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const LABELS_TO_DELETE = [ |
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"auto_delete" |
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]; |
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|
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/** Labels to never delete */ |
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const LABELS_TO_NOT_DELETE = [ |
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"do_not_delete" |
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] |
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|
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const TRIGGER_NAME = "dailyDeleteGmail"; |
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|
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/** Purge messages in the above label automatically after how many days? */ |
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const DELETE_AFTER_DAYS = "30"; |
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|
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/** Maximum number of threads to process per run */ |
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const PAGE_SIZE = 300; |
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|
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/** If number of threads exceeds page size, resume job after X mins (max execution time is 6 mins) */ |
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const RESUME_FREQUENCY = 15; |
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|
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/** what hour to run the daily trigger at */ |
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const DAILY_RUN_HOUR = 10; |
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|
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/** |
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* Creates an initial trigger to run the project, |
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* subsequent runs are automatically created |
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*/ |
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function Install() { |
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// First run 1 minute after install |
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console.log("In Install, creating trigger to run after 1 minute"); |
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ScriptApp.newTrigger(TRIGGER_NAME) |
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.timeBased() |
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.after(1000*60*1) |
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.create(); |
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} |
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|
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/** |
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* Removes any lingering triggers. |
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* During normal execution new triggers are created, |
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* To stop/remove this project, run this manually |
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*/ |
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function Uninstall() { |
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const triggers = ScriptApp.getProjectTriggers(); |
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console.log(`Found ${triggers.length} triggers to remove`); |
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triggers.forEach(trigger => { |
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ScriptApp.deleteTrigger(trigger); |
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}) |
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} |
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|
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function dailyDeleteGmail(ev) { |
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console.log(`Running for ${Session.getActiveUser().getEmail() ?? "unknown"}`); |
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const labels = LABELS_TO_DELETE.map(label => `label:${label}`).join(" OR "); |
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const not_labels = LABELS_TO_NOT_DELETE.map(label => `label:${label}`).join(" OR "); |
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const search = `(${labels}) NOT (${not_labels}) older_than:${DELETE_AFTER_DAYS}d`; |
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console.log(`search query: ${search}`); |
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|
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try { |
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Uninstall(); |
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|
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const threads = GmailApp.search(search, 0, PAGE_SIZE); |
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|
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if (threads.length === PAGE_SIZE) { |
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const followupTime = 1000*60*RESUME_FREQUENCY; |
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console.log(`More to do, scheduling a followup trigger to run after ${RESUME_FREQUENCY} minutes`); |
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ScriptApp.newTrigger(TRIGGER_NAME) |
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.timeBased() |
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.after(followupTime) |
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.create(); |
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} else { |
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console.log("Caught up, creating a followup trigger for tomorrow."); |
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const nextRunTime = new Date(); |
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nextRunTime.setDate(nextRunTime.getDate() + 1); |
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nextRunTime.setHours(DAILY_RUN_HOUR); |
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ScriptApp.newTrigger(TRIGGER_NAME) |
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.timeBased() |
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.at(nextRunTime) |
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.create(); |
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} |
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|
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console.log("Processing " + threads.length + " threads..."); |
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const age = new Date(); |
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age.setDate(age.getDate() - DELETE_AFTER_DAYS); |
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let deleted = 0; |
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threads.forEach(thread => { |
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if (thread.getLastMessageDate() < age) { |
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thread.moveToTrash(); |
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deleted += thread.getMessageCount(); |
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} else { |
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const messages = GmailApp.getMessagesForThread(thread); |
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messages.forEach(email => { |
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if (email.getDate() < age) { |
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email.moveToTrash(); |
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deleted++ |
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} |
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}) |
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} |
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}) |
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console.log(`Run completed and moved ${deleted} mails to trash.`) |
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} catch (e) { |
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console.error(e); |
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} |
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} |
