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#  
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# App collection implementation
import os
from util import *

# Convert an id to an app id
def appid(id):
    return ("apps", car(id), "app.stats")

# Put an app into the apps db
def put(id, app, cache, store, composites, pages):
    eid = cadr(caddr(car(app)))
    appentry = (("'entry", cadr(car(app)), ("'id", car(id))),)

    # Update app in apps db
    if car(id) == eid:
        cache.put(appid(id), appentry)
        return True

    # Clone an app's composite and page
    cache.put(appid(id), appentry)
    composites.put(id, composites.get((eid,)))
    pages.put(id, pages.get((eid,)))
    return True

# Get an app from the apps db
def get(id, cache, store, composites, pages):
    if isNil(id):
        return (("'feed", ("'title", "Apps"), ("'id", "apps")),)
    app = cache.get(appid(id));
    if isNil(app) or app is None:
        return (("'entry", ("'title", car(id)), ("'id", car(id))),)
    return app

# Delete an app from the apps db
def delete(id, cache, store, composites, pages):
    cache.delete(appid(id))
    composites.delete(id)
    pages.delete(id)
    return True