def search(request):
    Image = get_image_model()
    images = []
    q = None
    is_searching = False

    if 'q' in request.GET:
        form = SearchForm(request.GET)
        if form.is_valid():
            q = form.cleaned_data['q']

            # page number
            p = request.GET.get("p", 1)
            is_searching = True
            images = Image.search(q, results_per_page=20, page=p)
    else:
        form = SearchForm()

    if request.is_ajax():
        return render(request, "wagtailimages/images/results.html", {
            'images': images,
            'is_searching': is_searching,
            'search_query': q,
        })
    else:
        return render(request, "wagtailimages/images/index.html", {
            'form': form,
            'images': images,
            'is_searching': is_searching,
            'popular_tags': Image.popular_tags(),
            'search_query': q,
        })

def search(request, parent_page_id=None):
    # A missing or empty page_type parameter indicates 'all page types' (i.e. descendants of wagtailcore.page)
    page_type_string = request.GET.get('page_type') or 'wagtailcore.page'

    try:
        desired_classes = page_models_from_string(page_type_string)
    except (ValueError, LookupError):
        raise Http404

    search_form = SearchForm(request.GET)
    if search_form.is_valid() and search_form.cleaned_data['q']:
        pages = Page.objects.exclude(
            depth=1  # never include root
        )
        pages = filter_page_type(pages, desired_classes)
        pages = pages.search(search_form.cleaned_data['q'], fields=['title'])
    else:
        pages = Page.objects.none()

    paginator, pages = paginate(request, pages, per_page=25)

    for page in pages:
        page.can_choose = True

    return render(
        request, 'wagtailadmin/chooser/_search_results.html',
        shared_context(request, {
            'searchform': search_form,
            'pages': pages,
            'page_type_string': page_type_string,
        })
    )

def search(request, parent_page_id=None):
    page_type = request.GET.get('page_type') or 'wagtailcore.page'
    content_type_app_name, content_type_model_name = page_type.split('.')

    try:
        content_type = ContentType.objects.get_by_natural_key(content_type_app_name, content_type_model_name)
    except ContentType.DoesNotExist:
        raise Http404
    desired_class = content_type.model_class()

    search_form = SearchForm(request.GET)
    if search_form.is_valid() and search_form.cleaned_data['q']:
        pages = desired_class.objects.exclude(
            depth=1  # never include root
        ).filter(title__icontains=search_form.cleaned_data['q'])[:10]
    else:
        pages = desired_class.objects.none()

    shown_pages = []
    for page in pages:
        page.can_choose = True
        shown_pages.append(page)

    return render(request, 'wagtailadmin/chooser/_search_results.html', {
        'querystring': get_querystring(request),
        'searchform': search_form,
        'pages': shown_pages,
    })

def chooser(request):
    Document = get_document_model()

    if permission_policy.user_has_permission(request.user, "add"):
        DocumentForm = get_document_form(Document)
        uploadform = DocumentForm()
    else:
        uploadform = None

    documents = []

    q = None
    is_searching = False
    if "q" in request.GET or "p" in request.GET or "collection_id" in request.GET:
        documents = Document.objects.all()

        collection_id = request.GET.get("collection_id")
        if collection_id:
            documents = documents.filter(collection=collection_id)

        searchform = SearchForm(request.GET)
        if searchform.is_valid():
            q = searchform.cleaned_data["q"]

            documents = documents.search(q)
            is_searching = True
        else:
            documents = documents.order_by("-created_at")
            is_searching = False

        # Pagination
        paginator, documents = paginate(request, documents, per_page=10)

        return render(
            request,
            "wagtaildocs/chooser/results.html",
            {"documents": documents, "query_string": q, "is_searching": is_searching},
        )
    else:
        searchform = SearchForm()

        collections = Collection.objects.all()
        if len(collections) < 2:
            collections = None

        documents = Document.objects.order_by("-created_at")
        paginator, documents = paginate(request, documents, per_page=10)

    return render_modal_workflow(
        request,
        "wagtaildocs/chooser/chooser.html",
        "wagtaildocs/chooser/chooser.js",
        {
            "documents": documents,
            "uploadform": uploadform,
            "searchform": searchform,
            "collections": collections,
            "is_searching": False,
        },
    )

def search(request):
    pages = []
    q = None

    if "q" in request.GET:
        form = SearchForm(request.GET)
        if form.is_valid():
            q = form.cleaned_data["q"]

            pages = Page.objects.all().prefetch_related("content_type").search(q)
            paginator, pages = paginate(request, pages)
    else:
        form = SearchForm()

    if request.is_ajax():
        return render(
            request,
            "wagtailadmin/pages/search_results.html",
            {"pages": pages, "query_string": q, "pagination_query_params": ("q=%s" % q) if q else ""},
        )
    else:
        return render(
            request,
            "wagtailadmin/pages/search.html",
            {
                "search_form": form,
                "pages": pages,
                "query_string": q,
                "pagination_query_params": ("q=%s" % q) if q else "",
            },
        )

def search(request):
    documents = []
    q = None
    is_searching = False

    if 'q' in request.GET:
        form = SearchForm(request.GET)
        if form.is_valid():
            q = form.cleaned_data['q']

            is_searching = True
            documents = Document.search(q, results_per_page=20, prefetch_tags=True)
    else:
        form = SearchForm()

    if request.is_ajax():
        return render(request, "wagtaildocs/documents/results.html", {
            'documents': documents,
            'is_searching': is_searching,
            'search_query': q
        })
    else:
        return render(request, "wagtaildocs/documents/index.html", {
            'form': form,
            'documents': documents,
            'is_searching': True,
            'search_query': q,
            'popular_tags': Document.popular_tags(),
        })

def chooser(request, get_results=False):
    # Get most popular queries
    queries = models.Query.get_most_popular()

    # If searching, filter results by query string
    query_string = None
    if "q" in request.GET:
        searchform = SearchForm(request.GET)
        if searchform.is_valid():
            query_string = searchform.cleaned_data["q"]
            queries = queries.filter(query_string__icontains=normalise_query_string(query_string))
    else:
        searchform = SearchForm()

    paginator, queries = paginate(request, queries, per_page=10)

    # Render
    if get_results:
        return render(request, "wagtailsearch/queries/chooser/results.html", {"queries": queries})
    else:
        return render_modal_workflow(
            request,
            "wagtailsearch/queries/chooser/chooser.html",
            "wagtailsearch/queries/chooser/chooser.js",
            {"queries": queries, "searchform": searchform},
        )

def index(request):
    submissions = Submission.objects.all()

    # Ordering
    if request.GET.get('ordering') in ['title', '-submitted_at']:
        ordering = request.GET['ordering']
    else:
        ordering = '-submitted_at'
    submissions = submissions.order_by(ordering)

    # Search
    query_string = None
    if 'q' in request.GET:
        form = SearchForm(request.GET, placeholder=_("Search submissions"))
        if form.is_valid():
            query_string = form.cleaned_data['q']
            submissions = submissions.search(query_string)
    else:
        form = SearchForm(placeholder=_("Search submissions"))

    # Pagination
    paginator, submissions = paginate(request, submissions)

    return render(request, 'submissions/admin/index.html', {
        'submissions': submissions,
        'ordering': ordering,
        'query_string': query_string,
        'is_searching': bool(query_string),
        'search_form': form,
    })

def search(request):
    pages = []
    q = None

    if 'q' in request.GET:
        form = SearchForm(request.GET)
        if form.is_valid():
            q = form.cleaned_data['q']

            pages = Page.objects.all().prefetch_related('content_type').search(q)
            paginator, pages = paginate(request, pages)
    else:
        form = SearchForm()

    if request.is_ajax():
        return render(request, "wagtailadmin/pages/search_results.html", {
            'pages': pages,
            'query_string': q,
            'pagination_query_params': ('q=%s' % q) if q else ''
        })
    else:
        return render(request, "wagtailadmin/pages/search.html", {
            'search_form': form,
            'pages': pages,
            'query_string': q,
            'pagination_query_params': ('q=%s' % q) if q else ''
        })

def index(request):
    q = None
    is_searching = False

    model_fields = [f.name for f in User._meta.get_fields()]

    if 'q' in request.GET:
        form = SearchForm(request.GET, placeholder=_("Search users"))
        if form.is_valid():
            q = form.cleaned_data['q']
            is_searching = True
            conditions = Q()

            if 'username' in model_fields:
                conditions |= Q(username__icontains=q)

            if 'first_name' in model_fields:
                conditions |= Q(first_name__icontains=q)

            if 'last_name' in model_fields:
                conditions |= Q(last_name__icontains=q)

            if 'email' in model_fields:
                conditions |= Q(email__icontains=q)

            users = User.objects.filter(conditions)
    else:
        form = SearchForm(placeholder=_("Search users"))

    if not is_searching:
        users = User.objects.all()

    if 'last_name' in model_fields and 'first_name' in model_fields:
        users = users.order_by('last_name', 'first_name')

    if 'ordering' in request.GET:
        ordering = request.GET['ordering']

        if ordering == 'username':
            users = users.order_by(User.USERNAME_FIELD)
    else:
        ordering = 'name'

    paginator, users = paginate(request, users)

    if request.is_ajax():
        return render(request, "wagtailusers/users/results.html", {
            'users': users,
            'is_searching': is_searching,
            'query_string': q,
            'ordering': ordering,
        })
    else:
        return render(request, "wagtailusers/users/index.html", {
            'search_form': form,
            'users': users,
            'is_searching': is_searching,
            'ordering': ordering,
            'query_string': q,
        })

def search(request, parent_page_id=None):
    # A missing or empty page_type parameter indicates 'all page types' (i.e. descendants of wagtailcore.page)
    page_type_string = request.GET.get('page_type') or 'wagtailcore.page'

    try:
        desired_class = page_model_from_string(page_type_string)
    except (ValueError, LookupError):
        raise Http404

    search_form = SearchForm(request.GET)
    if search_form.is_valid() and search_form.cleaned_data['q']:
        pages = desired_class.objects.exclude(
            depth=1  # never include root
        ).filter(title__icontains=search_form.cleaned_data['q'])[:10]
    else:
        pages = desired_class.objects.none()

    shown_pages = []
    for page in pages:
        page.can_choose = True
        shown_pages.append(page)

    return render(
        request, 'wagtailadmin/chooser/_search_results.html',
        shared_context(request, {
            'searchform': search_form,
            'pages': shown_pages,
            'page_type_string': page_type_string,
        })
    )

def browse(request, parent_page_id=None):
    page_type = request.GET.get('page_type') or 'wagtailcore.page'
    content_type_app_name, content_type_model_name = page_type.split('.')

    is_searching = False

    try:
        content_type = ContentType.objects.get_by_natural_key(content_type_app_name, content_type_model_name)
    except ContentType.DoesNotExist:
        raise Http404
    desired_class = content_type.model_class()

    if 'q' in request.GET:
        search_form = SearchForm(request.GET)
        if search_form.is_valid() and search_form.cleaned_data['q']:
            pages = desired_class.objects.exclude(
                depth=1  # never include root
            ).filter(title__icontains=search_form.cleaned_data['q'])[:10]
            is_searching = True

    if not is_searching:
        if parent_page_id:
            parent_page = get_object_or_404(Page, id=parent_page_id)
        else:
            parent_page = Page.get_first_root_node()

        parent_page.can_choose = issubclass(parent_page.specific_class, desired_class)
        search_form = SearchForm()
        pages = parent_page.get_children()

    # restrict the page listing to just those pages that:
    # - are of the given content type (taking into account class inheritance)
    # - or can be navigated into (i.e. have children)

    shown_pages = []
    for page in pages:
        page.can_choose = issubclass(page.specific_class, desired_class)
        page.can_descend = page.get_children_count()

        if page.can_choose or page.can_descend:
            shown_pages.append(page)

    if is_searching:
        return render(request, 'wagtailadmin/chooser/_search_results.html', {
            'querystring': get_querystring(request),
            'searchform': search_form,
            'pages': pages,
            'is_searching': is_searching
        })

    return render_modal_workflow(request, 'wagtailadmin/chooser/browse.html', 'wagtailadmin/chooser/browse.js', {
        'allow_external_link': request.GET.get('allow_external_link'),
        'allow_email_link': request.GET.get('allow_email_link'),
        'querystring': get_querystring(request),
        'parent_page': parent_page,
        'pages': shown_pages,
        'search_form': search_form,
        'is_searching': False
    })

def index(request):
    # Get documents
    documents = Document.objects.all()

    # Ordering
    if 'ordering' in request.GET and request.GET['ordering'] in ['title', '-created_at']:
        ordering = request.GET['ordering']
    else:
        ordering = '-created_at'
    documents = documents.order_by(ordering)

    # Permissions
    if not request.user.has_perm('wagtaildocs.change_document'):
        # restrict to the user's own documents
        documents = documents.filter(uploaded_by_user=request.user)

    # Search
    query_string = None
    if 'q' in request.GET:
        form = SearchForm(request.GET, placeholder_suffix='documents')
        if form.is_valid():
            query_string = form.cleaned_data['q']
            if not request.user.has_perm('wagtaildocs.change_document'):
                # restrict to the user's own documents
                documents = Document.search(query_string, filters={'uploaded_by_user_id': request.user.id})
            else:
                documents = Document.search(query_string)
    else:
        form = SearchForm(placeholder_suffix='documents')

    # Pagination
    p = request.GET.get('p', 1)
    paginator = Paginator(documents, 20)

    try:
        documents = paginator.page(p)
    except PageNotAnInteger:
        documents = paginator.page(1)
    except EmptyPage:
        documents = paginator.page(paginator.num_pages)

    # Create response
    if request.is_ajax():
        return render(request, 'wagtaildocs/documents/results.html', {
            'ordering': ordering,
            'documents': documents,
            'query_string': query_string,
            'is_searching': bool(query_string),
        })
    else:
        return render(request, 'wagtaildocs/documents/index.html', {
            'ordering': ordering,
            'documents': documents,
            'query_string': query_string,
            'is_searching': bool(query_string),

            'search_form': form,
            'popular_tags': Document.popular_tags(),
        })

def index(request):
    Image = get_image_model()

    # Get images (filtered by user permission)
    images = permission_policy.instances_user_has_any_permission_for(request.user, ["change", "delete"]).order_by(
        "-created_at"
    )

    # Search
    query_string = None
    if "q" in request.GET:
        form = SearchForm(request.GET, placeholder=_("Search images"))
        if form.is_valid():
            query_string = form.cleaned_data["q"]

            images = images.search(query_string)
    else:
        form = SearchForm(placeholder=_("Search images"))

    # Filter by collection
    current_collection = None
    collection_id = request.GET.get("collection_id")
    if collection_id:
        try:
            current_collection = Collection.objects.get(id=collection_id)
            images = images.filter(collection=current_collection)
        except (ValueError, Collection.DoesNotExist):
            pass

    paginator, images = paginate(request, images)

    collections = permission_policy.collections_user_has_any_permission_for(request.user, ["add", "change"])
    if len(collections) < 2:
        collections = None

    # Create response
    if request.is_ajax():
        return render(
            request,
            "wagtailimages/images/results.html",
            {"images": images, "query_string": query_string, "is_searching": bool(query_string)},
        )
    else:
        return render(
            request,
            "wagtailimages/images/index.html",
            {
                "images": images,
                "query_string": query_string,
                "is_searching": bool(query_string),
                "search_form": form,
                "popular_tags": Image.popular_tags(),
                "collections": collections,
                "current_collection": current_collection,
                "user_can_add": permission_policy.user_has_permission(request.user, "add"),
            },
        )

def index(request):
    q = None
    is_searching = False

    if 'q' in request.GET:
        form = SearchForm(request.GET, placeholder=_("Search users"))
        if form.is_valid():
            q = form.cleaned_data['q']

            is_searching = True

            if User.USERNAME_FIELD == 'username':
                users = User.objects.filter(
                    Q(username__icontains=q) |
                    Q(first_name__icontains=q) |
                    Q(last_name__icontains=q) |
                    Q(email__icontains=q)
                )
            else:
                users = User.objects.filter(
                    Q(first_name__icontains=q) |
                    Q(last_name__icontains=q) |
                    Q(email__icontains=q)
                )
    else:
        form = SearchForm(placeholder=_("Search users"))

    if not is_searching:
        users = User.objects

    users = users.order_by('last_name', 'first_name')

    if 'ordering' in request.GET:
        ordering = request.GET['ordering']

        if ordering == 'username':
            users = users.order_by(ordering)
    else:
        ordering = 'name'

    paginator, users = paginate(request, users)

    if request.is_ajax():
        return render(request, "wagtailusers/users/results.html", {
            'users': users,
            'is_searching': is_searching,
            'query_string': q,
            'ordering': ordering,
        })
    else:
        return render(request, "wagtailusers/users/index.html", {
            'search_form': form,
            'users': users,
            'is_searching': is_searching,
            'ordering': ordering,
            'query_string': q,
        })

def index(request):
    q = None
    p = request.GET.get("p", 1)
    is_searching = False

    if 'q' in request.GET:
        form = SearchForm(request.GET, placeholder=_("Search users"))
        if form.is_valid():
            q = form.cleaned_data['q']

            is_searching = True

            if User.USERNAME_FIELD == 'username':
                users = User.objects.filter(Q(username__icontains=q) | Q(first_name__icontains=q) | Q(last_name__icontains=q) | Q(email__icontains=q))
            else:
                users = User.objects.filter(Q(first_name__icontains=q) | Q(last_name__icontains=q) | Q(email__icontains=q))
    else:
        form = SearchForm(placeholder=_("Search users"))

    if not is_searching:
        users = User.objects

    users = users.order_by('last_name', 'first_name')

    if 'ordering' in request.GET:
        ordering = request.GET['ordering']

        if ordering in ['name', 'username']:
            if ordering != 'name':
                users = users.order_by(ordering)
    else:
        ordering = 'name'

    paginator = Paginator(users, 20)

    try:
        users = paginator.page(p)
    except PageNotAnInteger:
        users = paginator.page(1)
    except EmptyPage:
        users = paginator.page(paginator.num_pages)

    if request.is_ajax():
        return render(request, "wagtailusers/users/results.html", {
            'users': users,
            'is_searching': is_searching,
            'query_string': q,
            'ordering': ordering,
        })
    else:
        return render(request, "wagtailusers/users/index.html", {
            'search_form': form,
            'users': users,
            'is_searching': is_searching,
            'ordering': ordering,
            'query_string': q,
        })

def chooser(request):
    Document = get_document_model()

    if permission_policy.user_has_permission(request.user, 'add'):
        DocumentForm = get_document_form(Document)
        uploadform = DocumentForm(user=request.user)
    else:
        uploadform = None

    documents = Document.objects.all()

    # allow hooks to modify the queryset
    for hook in hooks.get_hooks('construct_document_chooser_queryset'):
        documents = hook(documents, request)

    q = None
    if 'q' in request.GET or 'p' in request.GET or 'collection_id' in request.GET:

        collection_id = request.GET.get('collection_id')
        if collection_id:
            documents = documents.filter(collection=collection_id)

        searchform = SearchForm(request.GET)
        if searchform.is_valid():
            q = searchform.cleaned_data['q']

            documents = documents.search(q)
            is_searching = True
        else:
            documents = documents.order_by('-created_at')
            is_searching = False

        # Pagination
        paginator, documents = paginate(request, documents, per_page=10)

        return render(request, "wagtaildocs/chooser/results.html", {
            'documents': documents,
            'query_string': q,
            'is_searching': is_searching,
        })
    else:
        searchform = SearchForm()

        collections = Collection.objects.all()
        if len(collections) < 2:
            collections = None

        documents = documents.order_by('-created_at')
        paginator, documents = paginate(request, documents, per_page=10)

        return render_modal_workflow(request, 'wagtaildocs/chooser/chooser.html', 'wagtaildocs/chooser/chooser.js', {
            'documents': documents,
            'uploadform': uploadform,
            'searchform': searchform,
            'collections': collections,
            'is_searching': False,
        })

def chooser(request):
    if request.user.has_perm('wagtaildocs.add_document'):
        uploadform = DocumentForm()
    else:
        uploadform = None

    documents = []

    q = None
    is_searching = False
    if 'q' in request.GET or 'p' in request.GET:
        searchform = SearchForm(request.GET)
        if searchform.is_valid():
            q = searchform.cleaned_data['q']

            documents = Document.objects.search(q)
            is_searching = True
        else:
            documents = Document.objects.order_by('-created_at')
            is_searching = False

        # Pagination
        p = request.GET.get("p", 1)
        paginator = Paginator(documents, 10)

        try:
            documents = paginator.page(p)
        except PageNotAnInteger:
            documents = paginator.page(1)
        except EmptyPage:
            documents = paginator.page(paginator.num_pages)

        return render(request, "wagtaildocs/chooser/results.html", {
            'documents': documents,
            'query_string': q,
            'is_searching': is_searching,
        })
    else:
        searchform = SearchForm()

        documents = Document.objects.order_by('-created_at')
        p = request.GET.get("p", 1)
        paginator = Paginator(documents, 10)

        try:
            documents = paginator.page(p)
        except PageNotAnInteger:
            documents = paginator.page(1)
        except EmptyPage:
            documents = paginator.page(paginator.num_pages)

    return render_modal_workflow(request, 'wagtaildocs/chooser/chooser.html', 'wagtaildocs/chooser/chooser.js', {
        'documents': documents,
        'uploadform': uploadform,
        'searchform': searchform,
        'is_searching': False,
    })

def index(request):
    Image = get_image_model()

    # Get images
    images = Image.objects.order_by("-created_at")

    # Permissions
    if not request.user.has_perm("wagtailimages.change_image"):
        # restrict to the user's own images
        images = images.filter(uploaded_by_user=request.user)

    # Search
    query_string = None
    if "q" in request.GET:
        form = SearchForm(request.GET, placeholder=_("Search images"))
        if form.is_valid():
            query_string = form.cleaned_data["q"]

            is_searching = True
            if not request.user.has_perm("wagtailimages.change_image"):
                # restrict to the user's own images
                images = Image.search(query_string, filters={"uploaded_by_user_id": request.user.id})
            else:
                images = Image.search(query_string)
    else:
        form = SearchForm(placeholder=_("Search images"))

    # Pagination
    p = request.GET.get("p", 1)
    paginator = Paginator(images, 20)

    try:
        images = paginator.page(p)
    except PageNotAnInteger:
        images = paginator.page(1)
    except EmptyPage:
        images = paginator.page(paginator.num_pages)

    # Create response
    if request.is_ajax():
        return render(
            request,
            "wagtailimages/images/results.html",
            {"images": images, "query_string": query_string, "is_searching": bool(query_string)},
        )
    else:
        return render(
            request,
            "wagtailimages/images/index.html",
            {
                "images": images,
                "query_string": query_string,
                "is_searching": bool(query_string),
                "search_form": form,
                "popular_tags": Image.popular_tags(),
            },
        )

def index(request):
    Image = get_image_model()

    # Get images (filtered by user permission)
    images = permission_policy.instances_user_has_any_permission_for(
        request.user, ['change', 'delete']
    ).order_by('-created_at')

    # Search
    query_string = None
    if 'q' in request.GET:
        form = SearchForm(request.GET, placeholder=_("Search images"))
        if form.is_valid():
            query_string = form.cleaned_data['q']

            images = images.search(query_string)
    else:
        form = SearchForm(placeholder=_("Search images"))

    # Filter by collection
    current_collection = None
    collection_id = request.GET.get('collection_id')
    if collection_id:
        try:
            current_collection = Collection.objects.get(id=collection_id)
            images = images.filter(collection=current_collection)
        except (ValueError, Collection.DoesNotExist):
            pass

    paginator, images = paginate(request, images)

    collections = permission_policy.collections_user_has_any_permission_for(
        request.user, ['add', 'change']
    )
    if len(collections) < 2:
        collections = None

    # Create response
    if request.is_ajax():
        return render(request, 'wagtailimages/images/results.html', {
            'images': images,
            'query_string': query_string,
            'is_searching': bool(query_string),
        })
    else:
        return render(request, 'wagtailimages/images/index.html', {
            'images': images,
            'query_string': query_string,
            'is_searching': bool(query_string),

            'search_form': form,
            'popular_tags': Image.popular_tags(),
            'collections': collections,
            'current_collection': current_collection,
            'user_can_add': permission_policy.user_has_permission(request.user, 'add'),
        })