taskapp/events/task.py
author nishanth
Thu, 25 Feb 2010 02:11:49 +0530
changeset 89 1cc03941ed5d
parent 74 7dc764854867
child 90 b2426897ff18
permissions -rw-r--r--
added the capability of adding subtasks/dependencies .
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from datetime import datetime
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from pytask.taskapp.models import Profile, Task, Comment, Credit, Claim
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def publishTask(task):
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    """ set the task status to open """
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    sub_tasks = task.subs.all()
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    dependencies = task.deps.all()
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    if sub_tasks or any(map(lambda t:t.status!="CM",dependencies)):
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        task.status = "LO"
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    else:
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        task.status = "OP"
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    task.save()
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    return task
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def addSubTask(main_task, sub_task):
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    """ add the task to subs attribute of the task and update its status.
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    sub task can be added only if a task is in UP/OP/LO state.
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    """
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    ## Shall modify after talking to pr about subtasks
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    ## I think i might even remove the concept of subtasks
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    main_task.subs.add(sub_task)
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    sub_tasks = main_task.subs.all()
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    if main_task.status == "OP":
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        if any(map(lambda t:t.status!="CM",sub_tasks)):
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            main_task.status = "LO"
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        else:
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            "CM"
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    main_task.save()
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def addDep(main_task, dependency):
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    """ add the dependency task to deps attribute of the task.
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    update the status of main_task accordingly.
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    note that deps can be added only if task is in UP/OP/LO state.
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    And also if the task doesn't have any subs.
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    """
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    main_task.deps.add(dependency)
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    deps = main_task.deps.all()
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    if main_task.status in ["OP", "LO"]: 
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        if all(map(lambda t:t.status=="CM",deps)):
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            main_task.status = "OP"
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        else:
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            main_task.status = "LO"
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    main_task.save()
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def addMentor(task,mentor):
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    """ add the mentor to mentors list of the task """
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    task.mentors.add(mentor)
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    task.save()
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    return task    
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def createTask(title,desc,created_by,credits):
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    """ creates a bare minimum task with title, description and credits.
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    the creator of the task will be assigned as a mentor for the task.
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    """
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    try:
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        task = Task.objects.get(title__iexact=title)
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        return None
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    except Task.DoesNotExist:
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        task = Task(title=title)
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    task.desc = desc
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    task.created_by = created_by
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    task.credits = credits
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    task.creation_datetime = datetime.now()
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    task.save()
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    return task
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def addClaim(task, message, user):
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    """ add claim data to the database if it does not exist 
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    and also update the claimed users field of the task.
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    """
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    task.claimed_users.add(user)
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    task.save()
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    claim = Claim()
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    claim.message = message
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    claim.task = task
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    claim.user = user
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    claim.creation_datetime = datetime.now()
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    claim.save()
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def assignTask(task, user):
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    """ check for the status of task and assign it to the particular user """
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    if task.status in ['OP', 'WR']:
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        task.assigned_users.add(user)
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        task.claimed_users.remove(user)
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        task.status = "WR"
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    task.save()
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def getTask(tid):
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    """ retreive the task from database.
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    if the task has deps or subs, update its status correspondingly.
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    """
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    task = Task.objects.get(id=tid)
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    deps = task.deps.all()
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    subs = task.subs.all()
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    if deps and task.status in ["OP", "LO"]:
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        task.status = "OP" if all(map(lambda t:t.status=="CM",deps)) else "LO"
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    if subs and task.status in ["OP", "LO", "CM"]:
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        task.status = "CM" if all(map(lambda t:t.status=="CM",subs)) else "LO"
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    task.save()
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    return task
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def updateTask(task, title=None, desc=None, credits=None, tags_field=None):
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    """ update the property accordingly.
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    while updating title, check for uniqueness of title.
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    return None if any error. 
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    """
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    if title:
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        try:
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            task.title = title
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            task.save()
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        except Task.IntegrityError:
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            return None
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    if desc:task.desc = desc
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    if credits:task.credits = credits
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    if tags_field:task.tags_field = tags_field
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    task.save()
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    return task