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from django import http

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from django.shortcuts import render, redirect

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from qmsk.pages import pages

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def page_error (request, page, status, title, error_message=None, error_exception=None):

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    site = pages.SITE

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    if page:

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        page_hierarchy = list(page.hierarchy())

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    else:

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        tree = site.tree()

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        page_hierarchy = [(tree, None)]

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    return render(request, 'qmsk.pages/error.html', dict(

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        site_name       = site.name,

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        page_hierarchy  = page_hierarchy,

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        error_page      = page,

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        error_title     = title,

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        error_message   = error_message,

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        error_output    = str(error_exception) if error_exception else None,

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    ), status=status)

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# Create your views here.

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def page (request, page):

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    try:

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        page = pages.page(page)

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    except pages.NotFound as error:

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        return page_error(request, None,

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                status  = 404,

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                title   = u"Not Found",

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                error_message   = page,

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        )

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    redirect_page = page.redirect_page(request)

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    if redirect_page:

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        return redirect('page', redirect_page)

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    try:

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        return render(request, 'qmsk.pages/page.html', dict(

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                site_name       = page.tree.site.name,

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                page_name       = page.name,

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                page_title      = page.title,

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                page_breadcrumb = page.breadcrumb(),

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                page_hierarchy  = list(page.hierarchy()),

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                page_html       = page.render_html(request),

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                page_modified   = page.modified(),

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        ))

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    except pages.RenderError as error:

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        return page_error(request, page,

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                status  = 500,

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                title   = u"Server Error: {page}".format(page=page.url()),

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                error_exception     = error,

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        )