feat: add pushnotifications to events

Signed-off-by: Ales Verbic <[email protected]>

output/output.go

@@ -18,5 +18,6 @@ package output
 import (
 	_ "github.com/blinklabs-io/snek/output/log"
 	_ "github.com/blinklabs-io/snek/output/notify"
+	_ "github.com/blinklabs-io/snek/output/push"
 	_ "github.com/blinklabs-io/snek/output/webhook"
 )

output/push/options.go

@@ -0,0 +1,17 @@
+// Copyright 2023 Blink Labs, LLC.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package push
+
+type PushOptionFunc func(*PushOutput)

output/push/plugin.go

@@ -0,0 +1,36 @@
+// Copyright 2023 Blink Labs, LLC.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package push
+
+import (
+	"github.com/blinklabs-io/snek/plugin"
+)
+
+func init() {
+	plugin.Register(
+		plugin.PluginEntry{
+			Type:               plugin.PluginTypeOutput,
+			Name:               "push",
+			Description:        "Send push notifications for events",
+			NewFromOptionsFunc: NewFromCmdlineOptions,
+			Options:            []plugin.PluginOption{}, // Define any options if needed
+		},
+	)
+}
+
+func NewFromCmdlineOptions() plugin.Plugin {
+	p := New()
+	return p
+}

output/push/push.go

@@ -0,0 +1,128 @@
+// Copyright 2023 Blink Labs, LLC.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package push
+
+import (
+	"fmt"
+
+	"github.com/blinklabs-io/snek/event"
+	"github.com/blinklabs-io/snek/input/chainsync"
+)
+
+type PushOutput struct {
+	errorChan chan error
+	eventChan chan event.Event
+}
+
+type Notification struct {
+	Tokens   []string `json:"tokens"`
+	Platform int      `json:"platform"`
+	Message  string   `json:"message"`
+}
+
+type PushPayload struct {
+	Notifications []Notification `json:"notifications"`
+}
+
+func New(options ...PushOptionFunc) *PushOutput {
+	p := &PushOutput{
+		errorChan: make(chan error),
+		eventChan: make(chan event.Event, 10),
+	}
+	for _, option := range options {
+		option(p)
+	}
+	return p
+}
+
+func (p *PushOutput) Start() error {
+	go func() {
+		for {
+			evt, ok := <-p.eventChan
+			// Channel has been closed, which means we're shutting down
+			if !ok {
+				return
+			}
+			switch evt.Type {
+			case "chainsync.block":
+				payload := evt.Payload
+				if payload == nil {
+					panic(fmt.Errorf("ERROR: %v", payload))
+				}
+
+				be := payload.(chainsync.BlockEvent)
+				fmt.Println("Snek")
+				fmt.Printf("New Block!\nBlockNumber: %d, SlotNumber: %d\nHash: %s",
+					be.BlockNumber,
+					be.SlotNumber,
+					be.BlockHash,
+				)
+			case "chainsync.rollback":
+				payload := evt.Payload
+				if payload == nil {
+					panic(fmt.Errorf("ERROR: %v", payload))
+				}
+
+				re := payload.(chainsync.RollbackEvent)
+				fmt.Println("Snek")
+				fmt.Printf("Rollback!\nSlotNumber: %d\nBlockHash: %s",
+					re.SlotNumber,
+					re.BlockHash,
+				)
+			case "chainsync.transaction":
+				payload := evt.Payload
+				if payload == nil {
+					panic(fmt.Errorf("ERROR: %v", payload))
+				}
+
+				te := payload.(chainsync.TransactionEvent)
+				fmt.Println("Snek")
+				fmt.Printf("New Transaction!\nBlockNumber: %d, SlotNumber: %d\nInputs: %d, Outputs: %d\nHash: %s",
+					te.BlockNumber,
+					te.SlotNumber,
+					len(te.Inputs),
+					len(te.Outputs),
+					te.TransactionHash,
+				)
+			default:
+				fmt.Println("Snek")
+				fmt.Printf("New Event!\nEvent: %v", evt)
+			}
+		}
+	}()
+	return nil
+}
+
+// Stop the embedded output
+func (p *PushOutput) Stop() error {
+	close(p.eventChan)
+	close(p.errorChan)
+	return nil
+}
+
+// ErrorChan returns the input error channel
+func (p *PushOutput) ErrorChan() chan error {
+	return p.errorChan
+}
+
+// InputChan returns the input event channel
+func (p *PushOutput) InputChan() chan<- event.Event {
+	return p.eventChan
+}
+
+// OutputChan always returns nil
+func (p *PushOutput) OutputChan() <-chan event.Event {
+	return nil
+}