✨(models) add downloaded verb to tincan vocabulary

Simply add the http://id.tincanapi.com/verb/downloaded to the tincan
vocabulary so it can be used by other projects (here warren)

CHANGELOG.md

@@ -12,6 +12,8 @@ and this project adheres to
 
 - Implement edX open response assessment events pydantic models
 - Implement edx peer instruction events pydantic models
+- Implement xAPI VideoDownloaded pydantic model
+(using xAPI TinCan `downloaded` verb)
 
 ### Changed
 
@@ -32,7 +34,7 @@ and this project adheres to
 - Clean xAPI pydantic models naming convention
 - Upgrade `fastapi` to `0.97.0`
 - Upgrade `sentry_sdk` to `1.25.1`
-- Set Clickhouse `client_options` to a dedicated Pydantic model
+- Set Clickhouse `client_options` to a dedicated pydantic model
 - Upgrade `httpx` to `0.24.1`
 - Force a valid (JSON-formatted) IFI to be passed for the `/statements`
 GET query `agent` filtering

src/ralph/models/xapi/__init__.py

@@ -5,6 +5,7 @@
 from .navigation.statements import PageTerminated, PageViewed
 from .video.statements import (
     VideoCompleted,
+    VideoDownloaded,
     VideoEnableClosedCaptioning,
     VideoInitialized,
     VideoPaused,

src/ralph/models/xapi/concepts/verbs/tincan_vocabulary.py

@@ -24,3 +24,17 @@ class ViewedVerb(BaseXapiVerb):
         "http://id.tincanapi.com/verb/viewed"
     ] = "http://id.tincanapi.com/verb/viewed"
     display: Optional[Dict[Literal[LANG_EN_US_DISPLAY], Literal["viewed"]]]
+
+
+class DownloadedVerb(BaseXapiVerb):
+    """Pydantic model for downloaded `verb`.
+
+    Attributes:
+        id (str): Consists of the value `http://id.tincanapi.com/verb/downloaded`.
+        display (dict): Consists of the dictionary `{"en-US": "downloaded"}`.
+    """
+
+    id: Literal[
+        "http://id.tincanapi.com/verb/downloaded"
+    ] = "http://id.tincanapi.com/verb/downloaded"
+    display: Optional[Dict[Literal[LANG_EN_US_DISPLAY], Literal["downloaded"]]]

src/ralph/models/xapi/video/contexts.py

@@ -9,7 +9,7 @@
 
 from uuid import UUID
 
-from pydantic import Field, NonNegativeFloat
+from pydantic import Field, NonNegativeFloat, PositiveInt
 
 from ..base.contexts import BaseXapiContext, BaseXapiContextContextActivities
 from ..base.unnested_objects import BaseXapiActivity
@@ -20,6 +20,7 @@
     CONTEXT_EXTENSION_COMPLETION_THRESHOLD,
     CONTEXT_EXTENSION_FULL_SCREEN,
     CONTEXT_EXTENSION_LENGTH,
+    CONTEXT_EXTENSION_QUALITY,
     CONTEXT_EXTENSION_SCREEN_SIZE,
     CONTEXT_EXTENSION_SESSION_ID,
     CONTEXT_EXTENSION_SPEED,
@@ -132,6 +133,20 @@ class VideoBrowsingContextExtensions(VideoContextExtensions):
     )
 
 
+class VideoDownloadedContextExtensions(VideoContextExtensions):
+    """Represents the context.extensions field for video `downloaded` xAPI statement.
+
+    Attributes:
+        length (float): Consists of the length of the video.
+        quality (int): Consists of the video resolution or quality of the video.
+        session (uuid): Consists of the ID of the active session.
+    """
+
+    length: NonNegativeFloat = Field(alias=CONTEXT_EXTENSION_LENGTH)
+    quality: PositiveInt = Field(alias=CONTEXT_EXTENSION_QUALITY)
+    session_id: Optional[UUID] = Field(alias=CONTEXT_EXTENSION_SESSION_ID)
+
+
 class VideoEnableClosedCaptioningContextExtensions(VideoContextExtensions):
     """Represents the context.extensions field for video `interacted` xAPI statement.
 
@@ -232,6 +247,16 @@ class VideoTerminatedContext(BaseVideoContext):
     extensions: VideoBrowsingContextExtensions
 
 
+class VideoDownloadedContext(BaseVideoContext):
+    """Pydantic model for video downloaded `context` property.
+
+    Attributes:
+        extensions (dict): See VideoDownloadedContextExtensions.
+    """
+
+    extensions: VideoDownloadedContextExtensions
+
+
 class VideoEnableClosedCaptioningContext(BaseVideoContext):
     """Pydantic model for video enable closed captioning `context` property.
 

src/ralph/models/xapi/video/statements.py

@@ -11,9 +11,11 @@
     InteractedVerb,
     TerminatedVerb,
 )
+from ..concepts.verbs.tincan_vocabulary import DownloadedVerb
 from ..concepts.verbs.video import PausedVerb, PlayedVerb, SeekedVerb
 from .contexts import (
     VideoCompletedContext,
+    VideoDownloadedContext,
     VideoEnableClosedCaptioningContext,
     VideoInitializedContext,
     VideoPausedContext,
@@ -170,6 +172,25 @@ class VideoTerminated(BaseVideoStatement):
     context: VideoTerminatedContext
 
 
+class VideoDownloaded(BaseVideoStatement):
+    """Pydantic model for video downloaded statement.
+
+    Example: John downloaded (rather than accessed or opened) a video.
+
+    Attributes:
+        verb (dict): See DownloadedVerb.
+        context (dict): See VideoDownloadedContext.
+    """
+
+    __selector__ = selector(
+        object__definition__type="https://w3id.org/xapi/video/activity-type/video",
+        verb__id="http://id.tincanapi.com/verb/downloaded",
+    )
+
+    verb: DownloadedVerb = DownloadedVerb()
+    context: VideoDownloadedContext
+
+
 class VideoEnableClosedCaptioning(BaseVideoStatement):
     """Pydantic model for video enable closed captioning statement.
 

tests/models/xapi/concepts/test_verbs.py

@@ -17,7 +17,10 @@
     InteractedVerb,
     TerminatedVerb,
 )
-from ralph.models.xapi.concepts.verbs.tincan_vocabulary import ViewedVerb
+from ralph.models.xapi.concepts.verbs.tincan_vocabulary import (
+    DownloadedVerb,
+    ViewedVerb,
+)
 from ralph.models.xapi.concepts.verbs.video import PausedVerb, PlayedVerb, SeekedVerb
 from ralph.models.xapi.concepts.verbs.virtual_classroom import (
     LoweredHandVerb,
@@ -47,6 +50,7 @@
         (InteractedVerb, "http://adlnet.gov/expapi/verbs/interacted"),
         (TerminatedVerb, "http://adlnet.gov/expapi/verbs/terminated"),
         (ViewedVerb, "http://id.tincanapi.com/verb/viewed"),
+        (DownloadedVerb, "http://id.tincanapi.com/verb/downloaded"),
         (PausedVerb, "https://w3id.org/xapi/video/verbs/paused"),
         (PlayedVerb, "https://w3id.org/xapi/video/verbs/played"),
         (SeekedVerb, "https://w3id.org/xapi/video/verbs/seeked"),

tests/models/xapi/test_video.py

@@ -10,6 +10,7 @@
 from ralph.models.validator import Validator
 from ralph.models.xapi.video.statements import (
     VideoCompleted,
+    VideoDownloaded,
     VideoEnableClosedCaptioning,
     VideoInitialized,
     VideoPaused,
@@ -33,6 +34,7 @@
         VideoPlayed,
         VideoSeeked,
         VideoTerminated,
+        VideoDownloaded,
     ],
 )
 @custom_given(st.data())
@@ -148,6 +150,19 @@ def test_models_xapi_video_terminated_with_valid_statement(statement):
     )
 
 
+@custom_given(VideoDownloaded)
+def test_models_xapi_video_downloaded_with_valid_statement(statement):
+    """Tests that a video terminated statement has the expected `verb`.`id` and
+    `object`.`definition`.`type` property values.
+    """
+
+    assert statement.verb.id == "http://id.tincanapi.com/verb/downloaded"
+    assert (
+        statement.object.definition.type
+        == "https://w3id.org/xapi/video/activity-type/video"
+    )
+
+
 @custom_given(VideoEnableClosedCaptioning)
 def test_models_xapi_video_enable_closed_captioning_with_valid_statement(statement):
     """Tests that a video enable closed captioning statement has the expected