docs/modules/ROOT/pages/telegram-sink.adoc

// THIS FILE IS AUTOMATICALLY GENERATED: DO NOT EDIT
= image:kamelets/telegram-sink.svg[] Telegram Sink

*Provided by: "Apache Software Foundation"*

*Support Level for this Kamelet is: "Preview"*

Send a message to a Telegram chat using your Telegram bot as sender.

To create a bot, contact the @botfather account using the Telegram app.

This sink supports the following message types:

- Standard text messages
- PNG images (`Content-Type` must be set to `image/png`)
- JPEG images (`Content-Type` must be set to `image/jpeg`)

This following message headers are also supported:

- `text` / `ce-text`: when sending an image, the image caption
- `chat-id` / `ce-chat-id`: to override the default chat where messages are sent to

== Configuration Options

The following table summarizes the configuration options available for the `telegram-sink` Kamelet:
[width="100%",cols="2,^2,3,^2,^2,^3",options="header"]
|===
| Property| Name| Description| Type| Default| Example
| *authorizationToken {empty}* *| Token| The token to access your bot on Telegram. You you can obtain it from the Telegram @botfather.| string| | 
| chatId| Chat ID| The Chat ID where messages should be sent by default| string| | 
|===

NOTE: Fields marked with ({empty}*) are mandatory.

== Usage

This section summarizes how the `telegram-sink` can be used in various contexts.

=== Knative Sink

The `telegram-sink` Kamelet can be used as Knative sink by binding it to a Knative object.

.telegram-sink-binding.yaml
[source,yaml]
----
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: telegram-sink-binding
spec:
  source:
    ref:
      kind: InMemoryChannel
      apiVersion: messaging.knative.dev/v1
      name: mychannel
  sink:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: telegram-sink
    properties:
      authorizationToken: "The Token"
  
----
Make sure you have xref:latest@camel-k::installation/installation.adoc[Camel K installed] into the Kubernetes cluster you're connected to.

Save the `telegram-sink-binding.yaml` file into your hard drive, then configure it according to your needs.

You can run the sink using the following command:

[source,shell]
----
kubectl apply -f telegram-sink-binding.yaml
----

==== *Dependencies*

The Kamelet needs the following dependencies:

- camel:jackson
- camel:kamelet
- camel:telegram 

==== *Binding to Knative using the Kamel CLI:*

The procedure described above can be simplified into a single execution of the `kamel bind` command:

[source,shell]
----
kamel bind channel:mychannel telegram-sink -p "sink.authorizationToken=The Token"
----

This will create the KameletBinding under the hood and apply it to the current namespace in the cluster.

=== Kafka Sink

The `telegram-sink` Kamelet can be used as Kafka sink by binding it to a Kafka topic.

.telegram-sink-binding.yaml
[source,yaml]
----
apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: telegram-sink-binding
spec:
  source:
    ref:
      kind: KafkaTopic
      apiVersion: kafka.strimzi.io/v1beta1
      name: my-topic
  sink:
    ref:
      kind: Kamelet
      apiVersion: camel.apache.org/v1alpha1
      name: telegram-sink
    properties:
      authorizationToken: "The Token"
  
----

Ensure that you've installed https://strimzi.io/[Strimzi] and created a topic named `my-topic` in the current namespace.
Make also sure you have xref:latest@camel-k::installation/installation.adoc[Camel K installed] into the Kubernetes cluster you're connected to.

Save the `telegram-sink-binding.yaml` file into your hard drive, then configure it according to your needs.

You can run the sink using the following command:

[source,shell]
----
kubectl apply -f telegram-sink-binding.yaml
----

==== *Binding to Kafka using the Kamel CLI:*

The procedure described above can be simplified into a single execution of the `kamel bind` command:

[source,shell]
----
kamel bind kafka.strimzi.io/v1beta1:KafkaTopic:my-topic telegram-sink -p "sink.authorizationToken=The Token"
----

This will create the KameletBinding under the hood and apply it to the current namespace in the cluster.

==== Kamelet source file

Have a look at the following link:

https://github.com/apache/camel-kamelets/blob/main/telegram-sink.kamelet.yaml

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