Feat push notifications

fcm/message.go

@@ -0,0 +1,131 @@
+package fcm
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+
+	"golang.org/x/oauth2/google"
+)
+
+// TODO Fix log usage
+
+const (
+	scopeURL = "https://www.googleapis.com/auth/firebase.messaging"
+	// Get file serviceaccount file from config
+	credFile = ""
+)
+
+type Message struct {
+	MessageContent `json:"message"`
+}
+
+type MessageContent struct {
+	Token        string                 `json:"token"`
+	Notification *NotificationContent   `json:"notification,omitempty"`
+	Data         map[string]interface{} `json:"data,omitempty"`
+}
+
+type NotificationContent struct {
+	Title string `json:"title"`
+	Body  string `json:"body"`
+}
+
+type MessageOption func(*MessageContent)
+
+func WithData(data map[string]interface{}) MessageOption {
+	return func(m *MessageContent) {
+		m.Data = data
+	}
+}
+
+func WithNotification(title string, body string) MessageOption {
+	return func(m *MessageContent) {
+		m.Notification = &NotificationContent{
+			Title: title,
+			Body:  body,
+		}
+	}
+}
+
+func NewMessage(token string, opts ...MessageOption) *Message {
+	if token == "" {
+		log.Fatalf("Token is mandatory for FCM message")
+	}
+
+	msg := &Message{
+		MessageContent: MessageContent{
+			Token: token,
+		},
+	}
+	for _, opt := range opts {
+		opt(&msg.MessageContent)
+	}
+	return msg
+}
+
+func Send(token string, msg *Message) error {
+	// TODO Parse project id from service-account json
+	projectId := ""
+	fcmEndpoint := fmt.Sprintf("https://fcm.googleapis.com/v1/projects/%s/messages:send", projectId)
+
+	// Convert the message to JSON
+	payload, err := json.Marshal(msg)
+	if err != nil {
+		return err
+	}
+
+	fmt.Println(string(payload))
+
+	// Create a new HTTP request
+	req, err := http.NewRequest("POST", fcmEndpoint, bytes.NewBuffer(payload))
+	if err != nil {
+		return err
+	}
+
+	// Set headers
+	req.Header.Set("Authorization", "Bearer "+token)
+	req.Header.Set("Content-Type", "application/json")
+
+	// Execute the request
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	// Check for errors in the response
+	if resp.StatusCode != http.StatusOK {
+		body, _ := io.ReadAll(resp.Body)
+		return errors.New(string(body))
+	}
+
+	return nil
+}
+
+func GetAccessToken() string {
+	data, err := os.ReadFile(credFile)
+	if err != nil {
+		log.Fatalf("Failed to read the credential file: %v", err)
+	}
+
+	conf, err := google.JWTConfigFromJSON(data, scopeURL)
+	if err != nil {
+		log.Fatalf("Failed to parse the credential file: %v", err)
+	}
+
+	token, err := conf.TokenSource(context.Background()).Token()
+	if err != nil {
+		log.Fatalf("Failed to get token: %v", err)
+	}
+
+	fmt.Println(token.AccessToken)
+	return token.AccessToken
+}

go.mod

@@ -14,6 +14,8 @@ require (
 // replace github.com/blinklabs-io/gouroboros v0.52.0 => ../gouroboros
 
 require (
+	cloud.google.com/go/compute v1.20.1 // indirect
+	cloud.google.com/go/compute/metadata v0.2.3 // indirect
 	github.com/fxamacker/cbor/v2 v2.4.0 // indirect
 	github.com/go-toast/toast v0.0.0-20190211030409-01e6764cf0a4 // indirect
 	github.com/godbus/dbus/v5 v5.1.0 // indirect
@@ -24,4 +26,9 @@ require (
 	go.uber.org/multierr v1.10.0 // indirect
 	golang.org/x/crypto v0.12.0 // indirect
 	golang.org/x/sys v0.11.0 // indirect
+	go.uber.org/atomic v1.7.0 // indirect
+	go.uber.org/multierr v1.6.0 // indirect
+	golang.org/x/crypto v0.11.0 // indirect
+	golang.org/x/oauth2 v0.11.0 // indirect
+	golang.org/x/sys v0.10.0 // indirect
 )

go.sum

@@ -1,6 +1,11 @@
-github.com/benbjohnson/clock v1.3.0 h1:ip6w0uFQkncKQ979AypyG0ER7mqUSBdKLOgAle/AT8A=
-github.com/blinklabs-io/gouroboros v0.52.0 h1:5abdw2PXHKHxve26BITukfAzz7OJoTPKWylbyth9Sxk=
-github.com/blinklabs-io/gouroboros v0.52.0/go.mod h1:2wCCNNsHNYMT4gQB+bXS0Y99Oeu8+EM96hi7hW22C2w=
+cloud.google.com/go/compute v1.20.1 h1:6aKEtlUiwEpJzM001l0yFkpXmUVXaN8W+fbkb2AZNbg=
+cloud.google.com/go/compute v1.20.1/go.mod h1:4tCnrn48xsqlwSAiLf1HXMQk8CONslYbdiEZc9FEIbM=
+cloud.google.com/go/compute/metadata v0.2.3 h1:mg4jlk7mCAj6xXp9UJ4fjI9VUI5rubuGBW5aJ7UnBMY=
+cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA=
+github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
+github.com/blinklabs-io/gouroboros v0.48.0 h1:A3mqNX1C8QtW/CoIoF3iyXfKPrKyfyWfbjzdnkwj6Jw=
+github.com/blinklabs-io/gouroboros v0.48.0/go.mod h1:WBghLJF3Im3hXjMd8BFk929tfuSjcUZdn2zE2xtZJEo=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/fxamacker/cbor/v2 v2.4.0 h1:ri0ArlOR+5XunOP8CRUowT0pSJOwhW098ZCUyskZD88=
 github.com/fxamacker/cbor/v2 v2.4.0/go.mod h1:TA1xS00nchWmaBnEIxPSE5oHLuJBAVvqrtAnWBwBCVo=
@@ -29,6 +34,17 @@ go.uber.org/zap v1.25.0 h1:4Hvk6GtkucQ790dqmj7l1eEnRdKm3k3ZUrUMS2d5+5c=
 go.uber.org/zap v1.25.0/go.mod h1:JIAUzQIH94IC4fOJQm7gMmBJP5k7wQfdcnYdPoEXJYk=
 golang.org/x/crypto v0.12.0 h1:tFM/ta59kqch6LlvYnPa0yx5a83cL2nHflFhYKvv9Yk=
 golang.org/x/crypto v0.12.0/go.mod h1:NF0Gs7EO5K4qLn+Ylc+fih8BSTeIjAP05siRnAh98yw=
+go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
+go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
+go.uber.org/goleak v1.1.11 h1:wy28qYRKZgnJTxGxvye5/wgWr1EKjmUDGYox5mGlRlI=
+go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
+go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
+go.uber.org/zap v1.24.0 h1:FiJd5l1UOLj0wCgbSE0rwwXHzEdAZS6hiiSnxJN/D60=
+go.uber.org/zap v1.24.0/go.mod h1:2kMP+WWQ8aoFoedH3T2sq6iJ2yDWpHbP0f6MQbS9Gkg=
+golang.org/x/crypto v0.11.0 h1:6Ewdq3tDic1mg5xRO4milcWCfMVQhI4NkqWWvqejpuA=
+golang.org/x/crypto v0.11.0/go.mod h1:xgJhtzW8F9jGdVFWZESrid1U1bjeNy4zgy5cRr/CIio=
+golang.org/x/oauth2 v0.11.0 h1:vPL4xzxBM4niKCW6g9whtaWVXTJf1U5e4aZxxFx/gbU=
+golang.org/x/oauth2 v0.11.0/go.mod h1:LdF7O/8bLR/qWK9DrpXmbHLTouvRHK0SgJl0GmDBchk=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.11.0 h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=
 golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

output/output.go

@@ -18,4 +18,5 @@ package output
 import (
 	_ "github.com/blinklabs-io/snek/output/log"
 	_ "github.com/blinklabs-io/snek/output/notify"
+	_ "github.com/blinklabs-io/snek/output/push"
 )

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 +1,143 @@
+// 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"
+	"log"
+
+	"github.com/blinklabs-io/snek/event"
+	"github.com/blinklabs-io/snek/fcm"
+	"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)
+				accessToken := fcm.GetAccessToken()
+				// TODO define where tokens will be fetched from or we add this to topic
+				fcmToken := ""
+				title := "Snek"
+				body := fmt.Sprintf("New Transaction!\nBlockNumber: %d, SlotNumber: %d\nInputs: %d, Outputs: %d\nHash: %s",
+					te.BlockNumber,
+					te.SlotNumber,
+					len(te.Inputs),
+					len(te.Outputs),
+					te.TransactionHash,
+				)
+				msg := fcm.NewMessage(
+					fcmToken,
+					fcm.WithNotification(title, body),
+				)
+				err := fcm.Send(accessToken, msg)
+				if err != nil {
+					log.Fatalf("Failed to send message: %v", err)
+				}
+				fmt.Println("Message 1 sent successfully!")
+
+			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
+}