// can also be used to document progress in a project on one machine

concept G22TravelLogEntry {

  settable S computerID;

  settable S computerDescription;

  settable Timestamp timestamp;

  settable S gazelleCompilationDate;

  settable S projectID;

  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;

  static selfType create(G22Utils g22utils) {

    var cc = g22utils.concepts();

    ret new selfType()

      .computerID(main computerID())

      .timestamp(tsNow())

      .gazelleCompilationDate(g22utils.compilationDate())

      .projectID(g22utils.projectID())

      .projectDir(g22utils.projectDir())

      .conceptCount(countConcepts(cc))

      .conceptIDCounter(cc.idCounter)

      .lastConceptChange(main lastConceptChange(cc));

  }

  selfType scanProject(G22Utils g22utils) {

    L<File> files = findAllFiles_noDirs(g22utils.projectDir());

    ret

      lastFileChange(toTimestamp(max(map modificationTime(files))))

      .projectSize(longSum fileSize(files))

      .fileCount(l(files));

  }

  sbool shouldCreateEntry(G22Utils g22utils) {

    var entries = list(g22utils.concepts(), G22TravelLogEntry);

    if (empty(entries)) true;

    var last = highestByField(entries, "timestamp");

    if (!eq(last.computerID(), main computerID()))

      true;

    false;

  };

}