var things = Application("Things");
var logbook = things.lists.byName("Logbook").toDos();
var objs = [];

// From 6 weeks ago
var from = new Date(new Date().getTime() - (6 * 7 * 24 * 60 * 60 * 1000));
from.setHours(0);
from.setMinutes(0);
from.setSeconds(0);
var to = new Date();
to.setHours(23);
to.setMinutes(59);
to.setSeconds(59);

logbook.filter(task => {
  return task.completionDate() >= from && task.completionDate() < to;
}).forEach(todo => {
  var proj = todo.project();
  var tags = [];
  if (proj) {
    tags.push(...proj.tagNames().split(', '));
  }
  var area = todo.area() || proj && proj.area();
  objs.push({
    id: todo.id(),
    title: todo.name(),
    notes: todo.notes() || null,
    status: todo.status(),
    completion_date: todo.completionDate(),
    project: proj && { id: proj.id(), title: proj.name() },
    area: area && { id: area.id(), title: area.name() },
    tags: [...tags, ...todo.tagNames().split(', ')].filter(t => t),
  });
});

return JSON.stringify(objs, undefined, 2);