uid: rules_tools:getLastShutdownTimestamp
label: Get Last Shutdown Timestamp
description: Only works on a POSIX enviornment with bash. Pulls the last timestamp from the most recent events.log archive as the shutdown timestamp.
configDescriptions:
  - name: path
    type: TEXT
    label: Logs folder.
    required: true
    description: Path to the folder containing events.log and it's archives.
  - name: item
    type: TEXT
    context: item
    filterCriteria:
      - name: type
        value: DateTime
    label: Shutdown Timestamp Item
    required: true
    description: Item that holds the timetstamp of the last shutdown.
triggers:
  - id: "1"
    configuration:
      startlevel: 50
    type: core.SystemStartlevelTrigger
conditions: []
actions:
  - inputs: {}
    id: "2"
    configuration:
      type: application/javascript
      script: >+
        // Version 0.2


        // Imports

        var File = Java.type('java.io.File');

        var FileInputStream = Java.type('java.io.FileInputStream')

        var GZipInputStream = Java.type('java.util.zip.GZIPInputStream');

        var InputStreamReader = Java.type('java.io.InputStreamReader');

        var BufferedReader = Java.type('java.io.BufferedReader');


        // Properties

        var srcDirectory = new File('{{path}}');

        var timestampItem = '{{item}}';



        // Get all the events.log.X.gz files

        var listFiles = srcDirectory.listFiles();

        var file = epoch = listFiles.filter(f =>
        f.getName().startsWith("events.log."))
                                    .sort(( a,b) => b.lastModified() - a.lastModified())[0]
        console.debug(file);


        try {
          // Open the file for reading
          const fis = new FileInputStream(file);
          const gzis = new GZipInputStream(fis);
          const reader = new InputStreamReader(gzis);
          const breader = new BufferedReader(reader);
          
          // Get the last line
          let currLine = breader.readLine();
          let lastLine = null;
          while(currLine != null) {
            lastLine = currLine;
            currLine = breader.readLine();
          }

          // Extract the timestamp and convert it to an ISO8601
          let timestamp = time.toZDT(lastLine.substring(0, 22).replace(' ', 'T'));
          
          // Log a message and update the Item
          console.info('openHAB last shutdown at ' + timestamp);
          items[timestampItem].postUpdate(timestamp);
        } 

        catch(e) {
          console.error(e);
        }

    type: script.ScriptAction