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concept G22TravelLogEntry {
  settable S computerID;
  settable S computerDescription;
  settable Timestamp timestamp;
  settable S gazelleCompilationDate;
  settable File projectDir;
  settable long projectSize;
  settable int fileCount;
  settable int conceptCount;
  settable long conceptIDCounter;
  settable Timestamp lastConceptChange;
  settable Timestamp lastFileChange;
  
  // It will be nice to always put something in here
  // (Why was this entry made?)
  settable S action;
  
  // these are optional
  settable S importedFromURL;
  settable File importedFromFile;
  settable S backedUpToURL;
  settable File backedUpToFile;
  settable S comment;
  
  selfType create(G22Utils g22utils) {
    var cc = g22utils.concepts();
    
    ret new selfType()
      .computerID(computerID())
      .timestamp(tsNow())
      .gazelleCompilationDate(g22utils.compilationDate())
      .projectDir(g22utils.projectDir())
      .conceptCount(countConcepts(cc))
      .conceptIDCounter(cc.idCounter)
      .lastConceptChange(main lastConceptChange(cc));
  }
  
  void scanProject(G22Utils g22utils) {
    L<File> files = findAllFiles_noDirs(g22utils.projectDir());

    this
      .lastFileChange(toTimestamp(max(map modificationTime(files))))
      .projectSize(longSum fileSize(files))
      .fileCount(l(files));
  }
}