Synnefo » snf-image-creator

#!/usr/bin/env python

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import dialog

from image_creator.kamaki_wrapper import Kamaki

PAGE_WIDTH = 70

class Wizard:

    def __init__(self, session):

        self.session = session

        self.pages = []

        self.session['wizard'] = {}

    def add_page(self, page):

        self.pages.append(page)

    def run(self):

        idx = 0

        while True:

            idx += self.pages[idx].run(self.session, idx, len(self.pages))

            if idx >= len(self.pages):

                break

            if idx < 0:

                return False

        return True

class WizardPage:

    NEXT = 1

    PREV = -1

    def __init__(self, name, message, **kargs):

        self.name = name

        self.message = message

        self.title = kargs['title'] if 'title' in kargs else ''

        self.init_value = kargs['init'] if 'init' in kargs else ''

        self.allow_empty = kargs['empty'] if 'empty' in kargs else False

    def run(self, session, index, total):

        d = session['dialog']

        w = session['wizard']

        init = w[self.name] if self.name in w else self.init_value

        while True:

            (code, answer) = d.inputbox(self.message, init=init,

                width=PAGE_WIDTH, ok_label="Next", cancel="Back",

                title="(%d/%d) %s" % (index + 1, total, self.title))

            if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):

                return self.PREV

            value = answer.strip()

            if len(value) == 0 and self.allow_empty is False:

                d.msgbox("The value cannot be empty!", width=PAGE_WIDTH)

                continue

            w[self.name] = value

            break

        return self.NEXT

def wizard(session):

    name = WizardPage("ImageName", "Please provide a name for the image:",

                      title="Image Name", init=session['device'].distro)

    descr = WizardPage("ImageDescription",

        "Please provide a description for the image:",

        title="Image Description", empty=True,

        init=session['metadata']['DESCRIPTION'] if 'DESCRIPTION' in

        session['metadata'] else '')

    account = WizardPage("account",

        "Please provide your ~okeanos account e-mail:",

        title="~okeanos account information", init=Kamaki.get_account())

    token = WizardPage("token",

        "Please provide your ~okeanos account token:",

        title="~okeanos account token", init=Kamaki.get_token())

    w = Wizard(session)

    w.add_page(name)

    w.add_page(descr)

    w.add_page(account)

    w.add_page(token)

    return w.run()

# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :