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root / image_creator / dialog_wizard.py @ dbf466eb

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#!/usr/bin/env python
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# Copyright 2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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#   1. Redistributions of source code must retain the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer.
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#
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#   2. Redistributions in binary form must reproduce the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer in the documentation and/or other materials
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#      provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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import dialog
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import time
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import StringIO
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from image_creator.kamaki_wrapper import Kamaki, ClientError
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from image_creator.util import MD5, FatalError
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from image_creator.output.cli import OutputWthProgress
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PAGE_WIDTH = 70
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class Wizard:
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    def __init__(self, session):
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        self.session = session
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        self.pages = []
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        self.session['wizard'] = {}
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    def add_page(self, page):
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        self.pages.append(page)
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    def run(self):
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        idx = 0
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        while True:
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            idx += self.pages[idx].run(self.session, idx, len(self.pages))
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            if idx >= len(self.pages):
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                break
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            if idx < 0:
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                return False
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        return True
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class WizardPage:
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    NEXT = 1
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    PREV = -1
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    EXIT = -255
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    def run(self, session, index, total):
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        raise NotImplementedError
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class WizardInputPage(WizardPage):
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    def __init__(self, name, message, **kargs):
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        self.name = name
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        self.message = message
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        self.title = kargs['title'] if 'title' in kargs else ''
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        self.init_value = kargs['init'] if 'init' in kargs else ''
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        self.allow_empty = kargs['empty'] if 'empty' in kargs else False
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    def run(self, session, index, total):
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        d = session['dialog']
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        w = session['wizard']
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        init = w[self.name] if self.name in w else self.init_value
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        while True:
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            (code, answer) = d.inputbox(self.message, init=init,
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                width=PAGE_WIDTH, ok_label="Next", cancel="Back",
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                title="(%d/%d) %s" % (index + 1, total, self.title))
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            if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
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                return self.PREV
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            value = answer.strip()
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            if len(value) == 0 and self.allow_empty is False:
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                d.msgbox("The value cannot be empty!", width=PAGE_WIDTH)
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                continue
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            w[self.name] = value
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            break
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        return self.NEXT
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class WizardYesNoPage(WizardPage):
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    def __init__(self, message, **kargs):
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        self.message = message
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        self.title = kargs['title'] if 'title' in kargs else ''
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    def run(self, session, index, total):
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        d = session['dialog']
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        while True:
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            ret = d.yesno(self.message, width=PAGE_WIDTH, ok_label="Yes",
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                    cancel="Back", extra_button=1, extra_label="Quit",
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                    title="(%d/%d) %s" % (index + 1, total, self.title))
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            if ret == d.DIALOG_CANCEL:
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                return self.PREV
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            elif ret == d.DIALOG_EXTRA:
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                return self.EXIT
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            elif ret == d.DIALOG_OK:
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                return self.NEXT
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def wizard(session):
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    name = WizardInputPage("ImageName", "Please provide a name for the image:",
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                      title="Image Name", init=session['device'].distro)
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    descr = WizardInputPage("ImageDescription",
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        "Please provide a description for the image:",
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        title="Image Description", empty=True,
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        init=session['metadata']['DESCRIPTION'] if 'DESCRIPTION' in
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        session['metadata'] else '')
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    account = WizardInputPage("account",
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        "Please provide your ~okeanos account e-mail:",
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        title="~okeanos account information", init=Kamaki.get_account())
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    token = WizardInputPage("token",
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        "Please provide your ~okeanos account token:",
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        title="~okeanos account token", init=Kamaki.get_token())
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    msg = "Do you wish to continue with the image extraction process?"
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    proceed = WizardYesNoPage(msg, title="Confirmation")
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    w = Wizard(session)
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    w.add_page(name)
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    w.add_page(descr)
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    w.add_page(account)
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    w.add_page(token)
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    w.add_page(proceed)
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    if w.run():
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        extract_image(session)
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    else:
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        return False
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    return True
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def extract_image(session):
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    disk = session['disk']
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    device = session['device']
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    snapshot = session['snapshot']
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    image_os = session['image_os']
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    wizard = session['wizard']
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    out = OutputWthProgress(True)
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    #Initialize the output
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    disk.out = out
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    device.out = out
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    image_os.out = out
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    out.output()
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    #Sysprep
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    device.mount(False)
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    image_os.do_sysprep()
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    metadata = image_os.meta
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    device.umount()
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    #Shrink
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    size = device.shrink()
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    metadata.update(device.meta)
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    #MD5
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    md5 = MD5(out)
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    checksum = md5.compute(snapshot, size)
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    #Metadata
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    metastring = '\n'.join(
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        ['%s=%s' % (key, value) for (key, value) in metadata.items()])
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    metastring += '\n'
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    out.output()
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    try:
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        out.output("Uploading image to pithos:")
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        kamaki = Kamaki(wizard['account'], wizard['token'], out)
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        name = "%s-%s.diskdump" % (wizard['ImageName'],
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                                   time.strftime("%Y%m%d%H%M"))
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        pithos_file = ""
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        with open(snapshot, 'rb') as f:
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            pithos_file = kamaki.upload(f, size, name,
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                                         "(1/4)  Calculating block hashes",
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                                         "(2/4)  Uploading missing blocks")
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        out.output("(3/4)  Uploading metadata file...", False)
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        kamaki.upload(StringIO.StringIO(metastring), size=len(metastring),
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                      remote_path="%s.%s" % (name, 'meta'))
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        out.success('done')
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        out.output("(4/4)  Uploading md5sum file...", False)
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        md5sumstr = '%s %s\n' % (checksum, name)
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        kamaki.upload(StringIO.StringIO(md5sumstr), size=len(md5sumstr),
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                      remote_path="%s.%s" % (name, 'md5sum'))
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        out.success('done')
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        out.output()
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        out.output('Registring image to ~okeanos...', False)
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        kamaki.register(wizard['ImageName'], pithos_file, metadata)
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        out.success('done')
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        out.output()
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    except ClientError as e:
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        raise FatalError("Pithos client: %d %s" % (e.status, e.message))
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# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :