مرفقات نوع المحتوى

Python

انتقِل إلى ملف خادم Flask الذي يقدّم مسارات لعرض "استكشاف" عند إرفاق ملف (attachment-discovery-routes.py إذا كنت تتّبع المثال الذي قيّدناه). في أعلى مسار الإحالة الناجحة للإضافات (/classroom-addon في المثال المقدَّم)، استرجع مَعلمات الطلب courseId وitemId وitemType وaddOnToken واحفظها.

# Retrieve the itemId, courseId, and addOnToken query parameters.
if flask.request.args.get("itemId"):
    flask.session["itemId"] = flask.request.args.get("itemId")
if flask.request.args.get("itemType"):
    flask.session["itemType"] = flask.request.args.get("itemType")
if flask.request.args.get("courseId"):
    flask.session["courseId"] = flask.request.args.get("courseId")
if flask.request.args.get("addOnToken"):
    flask.session["addOnToken"] = flask.request.args.get("addOnToken")

لا تُسجَّل هذه القيم في الجلسة إلا إذا كانت متوفّرة، ولا تتم إرسالها مجددًا إذا عاد المستخدم إلى "عرض اكتشاف المرفقات" في وقت لاحق بدون إغلاق إطار iframe.

Python

توسيع نطاق تنفيذ SQLite وflask_sqlalchemy من الخطوات السابقة

انتقِل إلى الملف الذي حدّدت فيه جدول "المستخدِم" (models.py إذا كنت تتّبع المثال المقدَّم). أضِف ما يلي في أسفل الملف أسفل فئة User.

class Attachment(db.Model):
    # The attachmentId is the unique identifier for the attachment.
    attachment_id = db.Column(db.String(120), primary_key=True)

    # The image filename to store.
    image_filename = db.Column(db.String(120))

    # The image caption to store.
    image_caption = db.Column(db.String(120))

استورِد فئة "المرفق" الجديدة إلى ملف الخادم مع مسارات معالجة المرفق.

Python

في المثال الذي قدّمناه، يمكنك العثور على هذا العنصر في ملف webapp/attachment_routes.py.

@app.route("/attachment-options", methods=["GET", "POST"])
def attachment_options():
    """
    Render the attachment options page from the "attachment-options.html"
    template.

    This page displays a grid of images that the user can select using
    checkboxes.
    """

    # A list of the filenames in the static/images directory.
    image_filenames = os.listdir(os.path.join(app.static_folder, "images"))

    # The image_list_form_builder method creates a form that displays a grid
    # of images, checkboxes, and captions with a Submit button. All images
    # passed in image_filenames will be shown, and the captions will be the
    # title-cased filenames.

    # The form must be built dynamically due to limitations in WTForms. The
    # image_list_form_builder method therefore also returns a list of
    # attribute names in the form, which will be used by the HTML template
    # to properly render the form.
    form, var_names = image_list_form_builder(image_filenames)

    # If the form was submitted, validate the input and create the attachments.
    if form.validate_on_submit():

        # Build a dictionary that maps image filenames to captions.
        # There will be one dictionary entry per selected item in the form.
        filename_caption_pairs = construct_filename_caption_dictionary_list(
            form)

        # Check that the user selected at least one image, then proceed to
        # make requests to the Classroom API.
        if len(filename_caption_pairs) > 0:
            return create_attachments(filename_caption_pairs)
        else:
            return flask.render_template(
                "create-attachment.html",
                message="You didn't select any images.",
                form=form,
                var_names=var_names)

    return flask.render_template(
        "attachment-options.html",
        message=("You've reached the attachment options page. "
                "Select one or more images and click 'Create Attachment'."),
        form=form,
        var_names=var_names,
    )

يؤدي ذلك إلى ظهور صفحة "إنشاء مرفقات" تشبه ما يلي:

يمكن للمعلّم اختيار صور متعدّدة. أنشئ مرفقًا واحدًا لكل صورة اختارها المعلّم في طريقة create_attachments.

Python

في المثال الذي قدّمناه، يمكنك العثور على هذا العنصر في ملف webapp/attachment_routes.py.

def create_attachments(filename_caption_pairs):
    """
    Create attachments and show an acknowledgement page.

    Args:
        filename_caption_pairs: A dictionary that maps image filenames to
            captions.
    """
    # Get the Google Classroom service.
    classroom_service = googleapiclient.discovery.build(
        serviceName="classroom",
        version="v1",
        credentials=credentials)

Python

في المثال الذي قدّمناه، هذا هو استمرار لطريقة create_attachments.

# Create a new attachment for each image that was selected.
attachment_count = 0
for key, value in filename_caption_pairs.items():
    attachment_count += 1

    # Create a dictionary with values for the AddOnAttachment object fields.
    attachment = {
        # Specifies the route for a teacher user.
        "teacherViewUri": {
            "uri":
                flask.url_for(
                    "load_content_attachment", _scheme='https', _external=True),
        },
        # Specifies the route for a student user.
        "studentViewUri": {
            "uri":
                flask.url_for(
                    "load_content_attachment", _scheme='https', _external=True)
        },
        # The title of the attachment.
        "title": f"Attachment {attachment_count}",
    }

Python

في المثال الذي قدّمناه، هذا هو استمرار لطريقة create_attachments.

# Use the itemType to determine which stream item type the teacher created
match flask.session["itemType"]:
    case "announcements":
        parent = classroom_service.courses().announcements()
    case "courseWorkMaterials":
        parent = classroom_service.courses().courseWorkMaterials()
    case _:
        parent = classroom_service.courses().courseWork()

# Issue a request to create the attachment.
resp = parent.addOnAttachments().create(
    courseId=flask.session["courseId"],
    itemId=flask.session["itemId"],
    addOnToken=flask.session["addOnToken"],
    body=attachment).execute()

Python

في المثال الذي قدّمناه، هذا هو استمرار لطريقة create_attachments.

# Store the value by id.
new_attachment = Attachment(
    # The new attachment's unique ID, returned in the CREATE response.
    attachment_id=resp.get("id"),
    image_filename=key,
    image_caption=value)
db.session.add(new_attachment)
db.session.commit()

Python

في المثال الذي قدّمناه، يمكنك العثور على هذا العنصر في ملف webapp/attachment_routes.py.

@app.route("/load-content-attachment")
def load_content_attachment():
    """
    Load the attachment for the user's role."""

    # Since this is a landing page for the Teacher and Student View iframes, we
    # need to preserve the incoming query parameters.
    if flask.request.args.get("itemId"):
        flask.session["itemId"] = flask.request.args.get("itemId")
    if flask.request.args.get("itemType"):
        flask.session["itemType"] = flask.request.args.get("itemType")
    if flask.request.args.get("courseId"):
        flask.session["courseId"] = flask.request.args.get("courseId")
    if flask.request.args.get("attachmentId"):
        flask.session["attachmentId"] = flask.request.args.get("attachmentId")

Python

في المثال الذي قدّمناه، هذا هو استمرار لطريقة load_content_attachment.

# Create an instance of the Classroom service.
classroom_service = googleapiclient.discovery.build(
    serviceName="classroom"
    version="v1",
    credentials=credentials)

# Use the itemType to determine which stream item type the teacher created
match flask.session["itemType"]:
    case "announcements":
        parent = classroom_service.courses().announcements()
    case "courseWorkMaterials":
        parent = classroom_service.courses().courseWorkMaterials()
    case _:
        parent = classroom_service.courses().courseWork()

addon_context_response = parent.getAddOnContext(
    courseId=flask.session["courseId"],
    itemId=flask.session["itemId"]).execute()

Python

في المثال الذي قدّمناه، هذا هو استمرار لطريقة load_content_attachment.

# Determine which view we are in by testing the returned context type.
user_context = "student" if addon_context_response.get(
    "studentContext") else "teacher"

# Look up the attachment in the database.
attachment = Attachment.query.get(flask.session["attachmentId"])

# Set the text for the next page depending on the user's role.
message_str = f"I see that you're a {user_context}! "
message_str += (
    f"I've loaded the attachment with ID {attachment.attachment_id}. "
    if user_context == "teacher" else
    "Please enjoy this image of a famous landmark!")

# Show the content with the customized message text.
return flask.render_template(
    "show-content-attachment.html",
    message=message_str,
    image_filename=attachment.image_filename,
    image_caption=attachment.image_caption,
    responses=response_strings)