mpt-extension-contrib-custom-notifications 1.0.0

Pluggable notification channels (Teams, …) for MPT Extension SDK projects.

mpt-extension-contrib-custom-notifications

Shared notification channels for SoftwareONE MPT extensions built on the Extension SDK. Extensions report to a channel (Microsoft Teams today, AWS SES next) through one registry — ctx.notifications — instead of re-implementing a sender per extension.

Channels are pluggable: each is gated by an optional-dependency extra and self-registers through an entry point, so a base install pulls no channel dependencies and only the channels you install and configure are exposed.

It consolidates the per-extension notification code previously re-implemented in the AWS (swo/notifications/teams.py) and Adobe (adobe_vipm/notifications.py) extensions.

See AGENTS.md for the module documentation map.

Install

pip install "mpt-extension-contrib-custom-notifications[teams]"

The base distribution has no channel dependencies. Each channel is an extra:

Extra	Pulls in	Channel key
teams	microsoft-teams-cards, httpx	teams

Public API

mpt_extension_contrib.custom_notifications exposes the core; channel implementations live under mpt_extension_contrib.custom_notifications.channels.<name>.

Object	Purpose
NotificationsContextMixin	Adds self.notifications to an SDK context, built from settings.
NotificationRegistry	Named lookup of configured channels (register, get).
build_registry(settings)	Discover installed channels and register the configured ones.
Notification	Marker Protocol every channel satisfies.
NotificationChannel	Entry-point descriptor (name, build) advertised by a channel.
NotificationSettings	Marker Protocol for the settings a channel factory reads.

Teams channel — mpt_extension_contrib.custom_notifications.channels.teams (extra teams):

Object	Purpose
TeamsNotifications	Send Adaptive Cards to a Teams channel via a Workflows webhook.
TeamsNotifier	Protocol a custom Teams implementation must preserve.
TeamsSettings	Protocol describing the settings the channel reads (teams_webhook_url).
Button, FactsSection	Value types for a card link button and a facts section.

Usage

Make the extension settings satisfy each installed channel's settings protocol (inherit it so the contract is type-checked), then mix NotificationsContextMixin into the context — it reads the standard ext_settings, so no extra wiring:

from dataclasses import dataclass

from mpt_extension_sdk.settings.extension import BaseExtensionSettings

from mpt_extension_contrib.custom_notifications import NotificationsContextMixin
from mpt_extension_contrib.custom_notifications.channels.teams import TeamsSettings


@dataclass(frozen=True)
class ExtensionSettings(BaseExtensionSettings, TeamsSettings):
    # MSTEAMS_WEBHOOK_URL is read from the extension configuration.
    teams_webhook_url: str | None = None


class OrderContext(NotificationsContextMixin, SdkOrderContext): ...

Then resolve a channel and send. get(NotifierProtocol) returns the registered channel that satisfies the protocol, typed as that protocol:

from mpt_extension_contrib.custom_notifications.channels.teams import (
    Button,
    FactsSection,
    TeamsNotifier,
)

teams = ctx.notifications.get(TeamsNotifier)
teams.send_error(
    "Agreement sync failed",
    str(exc),
    button=Button(label="Open agreement", url=agreement_url),
    facts=FactsSection(title="Context", entries={"Agreement": agreement_id}),
)

A channel appears in the registry only when both its extra is installed and it is configured in settings. Asking for a channel that is not registered raises KeyError, so an extension that does not use Teams neither installs the extra nor configures the webhook.

Custom channels

A custom implementation only has to satisfy the channel Protocol; register it under any key (use override=True to replace a built-in):

ctx.notifications.register("teams", MyTeamsNotifications(...), override=True)

To make a custom channel discoverable across extensions, ship it as its own distribution that advertises a mpt_extension_contrib.custom_notifications.channels entry point exposing a NotificationChannel.

Documentation

• Usage — install, configure, send, and write your own channel
• Architecture
• Contributing
• Testing
• Releases