Initial prototype
Change-Id: I60a94e90aab48dfcf7c1f03fe5613d1db7d0df95
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4c49bd7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.env
diff --git a/.gitreview b/.gitreview
new file mode 100644
index 0000000..e8ad953
--- /dev/null
+++ b/.gitreview
@@ -0,0 +1,5 @@
+[gerrit]
+host=gerrit.avm99963.com
+port=29418
+project=gomodules/hichip2mqtt
+defaultbranch=main
diff --git a/CREDITS b/CREDITS
new file mode 100644
index 0000000..74dc37a
--- /dev/null
+++ b/CREDITS
@@ -0,0 +1,57 @@
+This project is based in the Go-Guerrilla project.
+
+-------------
+https://github.com/flashmob/go-guerrilla
+-------------
+The MIT License (MIT)
+
+Copyright (c) 2016 GuerrillaMail.com.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+-------------
+
+The //cmd/hichipbridge/Dockerfile and //cmd/hichipbridge/Makefile files are
+based in gerritbot's Dockerfile and Makefile files.
+
+-------------
+https://github.com/golang/build/tree/master/cmd/gerritbot
+-------------
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+ * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+-------------
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..da17a30
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2020 Adrià Vilanova Martínez (@avm99963)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/README.md b/README.md
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index 0000000..dc90a42
--- /dev/null
+++ b/README.md
@@ -0,0 +1,112 @@
+# hichip2mqtt bridge
+
+This program is a bridge to convert motion detection email notifications from
+the Hichip IP Cameras to MQTT messages. It runs continously as a daemon.
+
+It is based in the [Go-Guerilla](https://github.com/flashmob/go-guerrilla)
+SMTP server and a custom processor in order to process incoming emails, and in
+the [Eclipse Paho MQTT client](https://github.com/eclipse/paho.mqtt.golang) in
+order to interact with the MQTT broker to send the motion detected event
+details.
+
+## Overview
+The bridge will receive email notifications from HiChip IP cameras directed to
+`*@{HICHIPBRIDGE_SMTP_HOST}`. Then, it will process each message received by
+checking whether the message's body contains a token, and after that it will
+publish the event as a MQTT message in the
+`{HICHIPBRIDGE_MQTT_TOPIC}/{USERNAME}/motion` topic, where `{USERNAME}` is the
+username part of the email address sending the message.
+
+The message will be a JSON string containing only a `timestamp` field with the
+UNIX timestamp of the motion event. This is done like this because in the future
+additional fields will be added.
+
+This is an example of the published MQTT messages:
+
+```
+{"timestamp":0}
+```
+
+*** aside
+The server also publishes the `online` message to
+`{HICHIPBRIDGE_MQTT_TOPIC}/status` when it is started, and sets the `offline`
+message as the last will message to the same topic, so it gets published when
+the daemon disconnects from the MQTT broker due to a manual stop/crash/etc.
+***
+
+## Run the bridge
+
+There are 2 ways to run the bridge: running the daemon binary directly, or
+running it as a Docker container.
+
+### Use daemon directly
+
+First, install the daemon using the following command:
+`go install gomodules.avm99963.com/hichip2mqtt/cmd/hichip2mqtt`
+
+Then you can run the daemon using `hichipbridge serve` (make sure to include
+Go's bin folder in your PATH).
+
+Before running it, though, you'll have to
+[create a configuration file](#configuration-file) and set several
+[environment variables](#environment-variables).
+
+### Use the Docker image
+
+In order to use the Docker image, you'll have to build it first (a CD system to
+publish the image at the Docker public registry will be developed later on). To
+build it, go to the `cmd/hichipbridge` folder and run the following command:
+`make docker-prod`.
+
+Then, set up the `docker-compose.yml` file to fit your needs,
+[create a configuration file](#configuration-file) and set the
+[environment variables](#environment-variables).
+
+After that, you can create and run the Docker container via docker-compose by
+running `docker-compose up`.
+
+## Configuration file
+The configuration file is used for the Go-Guerilla module, in order to configure
+the STMP server.
+
+By default, the daemon looks for a `config.json` file in the current directory,
+but a different location can be supplied via the `-c` flag.
+
+To learn its syntax, take a look at the
+[documentation for the Go-Guerrilla module](https://github.com/flashmob/go-guerrilla/wiki/Configuration).
+You can also use the `config.sample.json` file as a template.
+
+*** promo
+**Note:** The `allowed_hosts` setting, and the `save_process`,
+`validate_process` and `primary_mail_host` subsettings in the `backend_config`
+setting are overriden by the environmental variables, and so don't need to be
+configured in the `config.json` file.
+***
+
+## Environment variables
+Some settings are set via environment variables.
+
+- If you're using the binary directly, you should set those up manually in your
+system. Take a look at the `env.sample` file to see the list of environment
+variables that you should set.
+- If you're using the Docker container via docker-compose, you should set
+those in the `.env` file (you can use the `env.sample` file as a template).
+
+## Set the IP cameras
+In order for the daemon to receive email notifications, the cameras have to be
+set up to send the email messages to the daemon's STMP server.
+
+For that, configure your HiChip IP camera with the following settings:
+
+- **SMTP server name/port:** according to your `config.json` file.
+- **SMTP Authentication:** Off
+- **Recipient/Send to:** `{random_username}@{HICHIP_SMTP_HOST}`, where
+`{random_username}` is ignored and can be set to anything, and
+`{HICHIP_SMTP_HOST}` has to be set as the corresponding enviromental variable's
+value.
+- **Sender:** `{username}@{random_domain}`, where `{username}` is what the
+daemon will understand as the camera's username, and will be used to form the
+MQTT topic name. `{random_domain}` is ignored and can be set to anything, such
+as `cams.example.com`.
+- **Message:** `Y-Token: {HICHIP_EMAIL_TOKEN}`, where `{HICHIP_EMAIL_TOKEN}` is
+the corresponding enviromental variable.
diff --git a/cmd/hichipbridge/.gitignore b/cmd/hichipbridge/.gitignore
new file mode 100644
index 0000000..3adf02a
--- /dev/null
+++ b/cmd/hichipbridge/.gitignore
@@ -0,0 +1,2 @@
+hichipbridge
+config.json
diff --git a/cmd/hichipbridge/Dockerfile b/cmd/hichipbridge/Dockerfile
new file mode 100644
index 0000000..f303928
--- /dev/null
+++ b/cmd/hichipbridge/Dockerfile
@@ -0,0 +1,35 @@
+FROM golang:latest as builder
+
+ENV CGO_ENABLED=0
+
+ENV GO111MODULE=on
+ENV GOPROXY=https://proxy.golang.org
+
+RUN mkdir /gocache
+ENV GOCACHE /gocache
+
+COPY go.mod /go/src/gomodules.avm99963.com/hichip2mqtt/go.mod
+COPY go.sum /go/src/gomodules.avm99963.com/hichip2mqtt/go.sum
+
+WORKDIR /go/src/gomodules.avm99963.com/hichip2mqtt
+
+# Optimization for iterative docker build speed, not necessary for correctness:
+RUN go install github.com/eclipse/paho.mqtt.golang
+RUN go install github.com/flashmob/go-guerrilla
+RUN go install github.com/go-sql-driver/mysql
+RUN go install github.com/sirupsen/logrus
+RUN go install github.com/spf13/cobra
+RUN go install gomodules.avm99963.com/forks/parsemail
+
+WORKDIR /go/src/gomodules.avm99963.com/hichip2mqtt/cmd/hichipbridge
+
+COPY . /go/src/gomodules.avm99963.com/hichip2mqtt/cmd/hichipbridge
+
+RUN go install gomodules.avm99963.com/hichip2mqtt/cmd/hichipbridge
+
+FROM alpine
+LABEL maintainer "me@avm99963.com"
+
+RUN apk add --no-cache tini
+COPY --from=builder /go/bin/hichipbridge /
+ENTRYPOINT ["/sbin/tini", "--", "/hichipbridge", "serve"]
diff --git a/cmd/hichipbridge/Makefile b/cmd/hichipbridge/Makefile
new file mode 100644
index 0000000..f3c5687
--- /dev/null
+++ b/cmd/hichipbridge/Makefile
@@ -0,0 +1,11 @@
+MUTABLE_VERSION ?= latest
+VERSION ?= $(shell git rev-parse --short HEAD)
+
+IMAGE_PROD := hichipbridge
+
+docker-prod: Dockerfile
+ docker build --force-rm -f Dockerfile --tag=$(IMAGE_PROD):$(VERSION) ../../
+ docker tag $(IMAGE_PROD):$(VERSION) $(IMAGE_PROD):$(MUTABLE_VERSION)
+
+push-prod: docker-prod
+ docker push $(IMAGE_PROD):$(VERSION)
diff --git a/cmd/hichipbridge/config.sample.json b/cmd/hichipbridge/config.sample.json
new file mode 100644
index 0000000..a0ad7d7
--- /dev/null
+++ b/cmd/hichipbridge/config.sample.json
@@ -0,0 +1,14 @@
+{
+ "log_file": "stderr",
+ "log_level": "debug",
+ "backend_config": {
+ "log_received_mails": false
+ },
+ "servers": [{
+ "is_enabled": true,
+ "max_size": 1000000,
+ "listen_interface": "0.0.0.0:25",
+ "timeout": 30,
+ "max_clients": 3
+ }]
+}
diff --git a/cmd/hichipbridge/docker-compose.yml b/cmd/hichipbridge/docker-compose.yml
new file mode 100644
index 0000000..92e8913
--- /dev/null
+++ b/cmd/hichipbridge/docker-compose.yml
@@ -0,0 +1,10 @@
+version: "3.9"
+services:
+ bridge:
+ image: "hichipbridge:latest"
+ ports:
+ - "8881:25"
+ env_file: .env
+ volumes:
+ - ./config.json:/config.json:ro
+ restart: unless-stopped
diff --git a/cmd/hichipbridge/env.sample b/cmd/hichipbridge/env.sample
new file mode 100644
index 0000000..4e0f25b
--- /dev/null
+++ b/cmd/hichipbridge/env.sample
@@ -0,0 +1,14 @@
+# Host for the SMTP server where you're going to receive email notifications
+HICHIPBRIDGE_SMTP_HOST="smtp-server.example.com"
+# MQTT broker endpoint
+HICHIPBRIDGE_MQTT_BROKER="mqtt://mqtt-broker.example.com:1883"
+# MQTT client id
+HICHIPBRIDGE_MQTT_CLIENTID="hichipbridge"
+# MQTT username
+HICHIPBRIDGE_MQTT_USERNAME="user"
+# MQTT password
+HICHIPBRIDGE_MQTT_PASSWORD="password"
+# Prefix for the MQTT topics where events will be saved
+HICHIPBRIDGE_MQTT_TOPIC="hichipbridge"
+# Token for the email notifications
+HICHIPBRIDGE_EMAIL_TOKEN="superconfidentialtoken;)"
diff --git a/cmd/hichipbridge/main.go b/cmd/hichipbridge/main.go
new file mode 100644
index 0000000..aa12bc4
--- /dev/null
+++ b/cmd/hichipbridge/main.go
@@ -0,0 +1,13 @@
+package main
+
+import (
+ "fmt"
+ "os"
+)
+
+func main() {
+ if err := rootCmd.Execute(); err != nil {
+ fmt.Println(err)
+ os.Exit(-1)
+ }
+}
diff --git a/cmd/hichipbridge/root.go b/cmd/hichipbridge/root.go
new file mode 100644
index 0000000..42eebdb
--- /dev/null
+++ b/cmd/hichipbridge/root.go
@@ -0,0 +1,32 @@
+package main
+
+import (
+ "github.com/sirupsen/logrus"
+ "github.com/spf13/cobra"
+)
+
+var rootCmd = &cobra.Command{
+ Use: "hichipbridge",
+ Short: "hichip2mqtt bridge daemon",
+ Long: `Daemon which serves as a bridge for hichip IP cameras and MQTT.
+Basically, it converts motion trigger emails notifications received into a state
+published in a MQTT topic.`,
+ Run: nil,
+}
+
+var (
+ verbose bool
+)
+
+func init() {
+ cobra.OnInitialize()
+ rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false,
+ "print out more debug information")
+ rootCmd.PersistentPreRun = func(cmd *cobra.Command, args []string) {
+ if verbose {
+ logrus.SetLevel(logrus.DebugLevel)
+ } else {
+ logrus.SetLevel(logrus.InfoLevel)
+ }
+ }
+}
diff --git a/cmd/hichipbridge/serve.go b/cmd/hichipbridge/serve.go
new file mode 100644
index 0000000..b16de0a
--- /dev/null
+++ b/cmd/hichipbridge/serve.go
@@ -0,0 +1,205 @@
+package main
+
+import (
+ "fmt"
+ "os"
+ "os/signal"
+ "syscall"
+ "time"
+
+ "github.com/flashmob/go-guerrilla"
+ "github.com/flashmob/go-guerrilla/backends"
+ "github.com/flashmob/go-guerrilla/log"
+
+ // Choose iconv or mail/encoding package which uses golang.org/x/net/html/charset
+ //_ "github.com/flashmob/go-guerrilla/mail/iconv"
+ _ "github.com/flashmob/go-guerrilla/mail/encoding"
+
+ "github.com/spf13/cobra"
+
+ _ "github.com/go-sql-driver/mysql"
+
+ "gomodules.avm99963.com/hichip2mqtt/mqtt_processor"
+)
+
+const (
+ defaultPidFile = "/var/run/hichipbridge.pid"
+)
+
+var (
+ configPath string
+ pidFile string
+
+ serveCmd = &cobra.Command{
+ Use: "serve",
+ Short: "start the daemon and start all available SMTP servers",
+ Run: serve,
+ }
+
+ signalChannel = make(chan os.Signal, 1) // for trapping SIGHUP and friends
+ mainlog log.Logger
+
+ d guerrilla.Daemon
+)
+
+func init() {
+ // log to stderr on startup
+ var err error
+ mainlog, err = log.GetLogger(log.OutputStderr.String(), log.InfoLevel.String())
+ if err != nil && mainlog != nil {
+ mainlog.WithError(err).Errorf("Failed creating a logger to %s", log.OutputStderr)
+ }
+ cfgFile := "config.json"
+ serveCmd.PersistentFlags().StringVarP(&configPath, "config", "c",
+ cfgFile, "Path to the configuration file")
+ // intentionally didn't specify default pidFile; value from config is used if flag is empty
+ serveCmd.PersistentFlags().StringVarP(&pidFile, "pidFile", "p",
+ "", "Path to the pid file")
+ rootCmd.AddCommand(serveCmd)
+}
+
+func sigHandler() {
+ signal.Notify(signalChannel,
+ syscall.SIGHUP,
+ syscall.SIGTERM,
+ syscall.SIGQUIT,
+ syscall.SIGINT,
+ syscall.SIGKILL,
+ syscall.SIGUSR1,
+ os.Kill,
+ )
+ for sig := range signalChannel {
+ if sig == syscall.SIGHUP {
+ if ac, err := readConfig(configPath, pidFile); err == nil {
+ _ = d.ReloadConfig(*ac)
+ } else {
+ mainlog.WithError(err).Error("Could not reload config")
+ }
+ } else if sig == syscall.SIGUSR1 {
+ if err := d.ReopenLogs(); err != nil {
+ mainlog.WithError(err).Error("reopening logs failed")
+ }
+ } else if sig == syscall.SIGTERM || sig == syscall.SIGQUIT || sig == syscall.SIGINT || sig == os.Kill {
+ mainlog.Infof("Shutdown signal caught")
+ go func() {
+ select {
+ // exit if graceful shutdown not finished in 60 sec.
+ case <-time.After(time.Second * 60):
+ mainlog.Error("graceful shutdown timed out")
+ os.Exit(1)
+ }
+ }()
+ d.Shutdown()
+ mainlog.Infof("Shutdown completed, exiting.")
+ return
+ } else {
+ mainlog.Infof("Shutdown, unknown signal caught")
+ return
+ }
+ }
+}
+
+func serve(cmd *cobra.Command, args []string) {
+ logVersion()
+ d = guerrilla.Daemon{Logger: mainlog}
+ d.AddProcessor("MQTT", mqtt_processor.Processor)
+
+ c, err := readConfig(configPath, pidFile)
+ if err != nil {
+ mainlog.WithError(err).Fatal("Error while reading config")
+ }
+ _ = d.SetConfig(*c)
+
+ // Check that max clients is not greater than system open file limit.
+ if ok, maxClients, fileLimit := guerrilla.CheckFileLimit(c); !ok {
+ mainlog.Fatalf("Combined max clients for all servers (%d) is greater than open file limit (%d). "+
+ "Please increase your open file limit or decrease max clients.", maxClients, fileLimit)
+ }
+
+ err = d.Start()
+ if err != nil {
+ mainlog.WithError(err).Error("Error(s) when creating new server(s)")
+ os.Exit(1)
+ }
+ sigHandler()
+
+}
+
+func lookupPrefixedEnv(coreName string) (string, error) {
+ name := "HICHIPBRIDGE_" + coreName
+ v, ok := os.LookupEnv(name)
+ if !ok {
+ return v, fmt.Errorf("Environment variable %s isn't set", name)
+ }
+
+ return v, nil
+}
+
+// ReadConfig is called at startup, or when a SIG_HUP is caught
+func readConfig(path string, pidFile string) (*guerrilla.AppConfig, error) {
+ // Environment variables where some settings are configured (without the prefix "HICHIPBRIDGE_"):
+ envNames := []string{
+ "SMTP_HOST",
+ "MQTT_BROKER",
+ "MQTT_CLIENTID",
+ "MQTT_USERNAME",
+ "MQTT_PASSWORD",
+ "MQTT_TOPIC",
+ "EMAIL_TOKEN",
+ }
+
+ // Set default configuration (overridable)
+ defaultAppConfig := guerrilla.AppConfig{
+ BackendConfig: backends.BackendConfig{
+ "save_workers_size": 1,
+ "log_received_mails": false,
+ },
+ }
+
+ d.SetConfig(defaultAppConfig)
+
+ // Load in the config.
+ appConfig, err := d.LoadConfig(path)
+ if err != nil {
+ return &appConfig, fmt.Errorf("could not read config file: %s", err.Error())
+ }
+
+ // override config pidFile with with flag from the command line
+ if len(pidFile) > 0 {
+ appConfig.PidFile = pidFile
+ } else if len(appConfig.PidFile) == 0 {
+ appConfig.PidFile = defaultPidFile
+ }
+ if verbose {
+ appConfig.LogLevel = "debug"
+ }
+
+ // Override compulsory settings
+ var envs = make(map[string]string)
+ for _, env := range envNames {
+ v, err := lookupPrefixedEnv(env)
+ if err != nil {
+ return &appConfig, err
+ }
+ envs[env] = v
+ }
+
+ appConfig.AllowedHosts = []string{envs["SMTP_HOST"]}
+ appConfig.BackendConfig = backends.BackendConfig{
+ "save_process": "HeadersParser|Hasher|Debugger|MQTT",
+ "validate_process": "",
+ "primary_mail_host": envs["SMTP_HOST"],
+ "mqtt_broker": envs["MQTT_BROKER"],
+ "mqtt_clientid": envs["MQTT_CLIENTID"],
+ "mqtt_username": envs["MQTT_USERNAME"],
+ "mqtt_password": envs["MQTT_PASSWORD"],
+ "mqtt_topic": envs["MQTT_TOPIC"],
+ "mqtt_email_token": envs["EMAIL_TOKEN"],
+ }
+
+ for i, _ := range appConfig.Servers {
+ appConfig.Servers[i].Hostname = envs["SMTP_HOST"]
+ }
+
+ return &appConfig, nil
+}
diff --git a/cmd/hichipbridge/version.go b/cmd/hichipbridge/version.go
new file mode 100644
index 0000000..269a5fe
--- /dev/null
+++ b/cmd/hichipbridge/version.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+ "github.com/spf13/cobra"
+
+ "github.com/flashmob/go-guerrilla"
+)
+
+var versionCmd = &cobra.Command{
+ Use: "version",
+ Short: "Print the version info",
+ Long: `Every software has a version. This is Guerrilla's`,
+ Run: func(cmd *cobra.Command, args []string) {
+ logVersion()
+ },
+}
+
+func init() {
+ rootCmd.AddCommand(versionCmd)
+}
+
+func logVersion() {
+ mainlog.Infof("Using guerrilla %s", guerrilla.Version)
+ mainlog.Debugf("Build Time: %s", guerrilla.BuildTime)
+ mainlog.Debugf("Commit: %s", guerrilla.Commit)
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..775389b
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,13 @@
+module gomodules.avm99963.com/hichip2mqtt
+
+go 1.15
+
+require (
+ github.com/asaskevich/EventBus v0.0.0-20200907212545-49d423059eef // indirect
+ github.com/eclipse/paho.mqtt.golang v1.3.1
+ github.com/flashmob/go-guerrilla v1.6.1
+ github.com/go-sql-driver/mysql v1.5.0
+ github.com/sirupsen/logrus v1.7.0
+ github.com/spf13/cobra v1.1.1
+ gomodules.avm99963.com/forks/parsemail v0.0.0-20210122134334-731e54968e51
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..e03125a
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,308 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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diff --git a/mqtt_processor/mqtt_processor.go b/mqtt_processor/mqtt_processor.go
new file mode 100644
index 0000000..256c469
--- /dev/null
+++ b/mqtt_processor/mqtt_processor.go
@@ -0,0 +1,144 @@
+package mqtt_processor
+
+import (
+ "bufio"
+ "encoding/json"
+ "fmt"
+
+ "github.com/flashmob/go-guerrilla/backends"
+ "github.com/flashmob/go-guerrilla/mail"
+
+ // TODO(avm99963): Change to github.com/DusanKasan/parsemail once the bug fixes land there
+ "gomodules.avm99963.com/forks/parsemail"
+
+ "github.com/eclipse/paho.mqtt.golang"
+)
+
+const subtopicStatus = "status"
+
+type MQTTConfig struct {
+ MQTTBroker string `json:"mqtt_broker"`
+ MQTTClientID string `json:"mqtt_clientid"`
+ MQTTUsername string `json:"mqtt_username"`
+ MQTTPassword string `json:"mqtt_password"`
+ MQTTTopic string `json:"mqtt_topic"`
+ EmailToken string `json:"mqtt_email_token"`
+}
+
+type motionEvent struct {
+ Timestamp int64 `json:"timestamp"`
+ CameraID string `json:"-"`
+}
+
+func hasToken(email *parsemail.Email, config *MQTTConfig) bool {
+ if config.EmailToken == "" {
+ backends.Log().Error("The mqtt_email_token field is empty")
+ return false
+ }
+
+ return email.TextBody == "Y-Token: "+config.EmailToken
+}
+
+func processMotionEvent(e *mail.Envelope, config *MQTTConfig) (*motionEvent, error) {
+ event := &motionEvent{}
+
+ dataReader := bufio.NewReader(&e.Data)
+ email, err := parsemail.Parse(dataReader)
+ if err != nil {
+ return event, err
+ }
+
+ if !hasToken(&email, config) {
+ return event, fmt.Errorf("Message body doesn't include the correct token")
+ }
+
+ event.CameraID = e.MailFrom.User
+ event.Timestamp = email.Date.Unix()
+
+ return event, nil
+}
+
+func processEmail(e *mail.Envelope, c mqtt.Client, config *MQTTConfig) error {
+ event, err := processMotionEvent(e, config)
+ if err != nil {
+ return err
+ }
+
+ backends.Log().Info(fmt.Sprintf("Motion event received: %v", event))
+
+ topic := config.MQTTTopic + "/" + event.CameraID + "/motion"
+ msg, err := json.Marshal(event)
+ if err != nil {
+ return err
+ }
+
+ if token := c.Publish(topic, 2, true, msg); token.Wait() && token.Error() != nil {
+ return token.Error()
+ }
+
+ backends.Log().Debug("MQTT message published successfully")
+
+ return nil
+}
+
+var Processor = func() backends.Decorator {
+ var (
+ c mqtt.Client
+ )
+
+ config := &MQTTConfig{}
+
+ initFunc := backends.InitializeWith(func(backendConfig backends.BackendConfig) error {
+ // Get configuration
+ configType := backends.BaseConfig(&MQTTConfig{})
+ bcfg, err := backends.Svc.ExtractConfig(backendConfig, configType)
+ if err != nil {
+ return err
+ }
+ config = bcfg.(*MQTTConfig)
+
+ // Set options for MQTT client
+ opts := mqtt.NewClientOptions()
+ opts = opts.AddBroker(config.MQTTBroker)
+ opts = opts.SetClientID(config.MQTTClientID)
+ opts = opts.SetUsername(config.MQTTUsername).SetPassword(config.MQTTPassword)
+ opts = opts.SetWill(config.MQTTTopic+"/"+subtopicStatus, "offline", 1, true)
+
+ // Create MQTT client and start the connection
+ c = mqtt.NewClient(opts)
+ if token := c.Connect(); token.Wait() && token.Error() != nil {
+ return token.Error()
+ }
+
+ // Send a birth message
+ if token := c.Publish(config.MQTTTopic+"/"+subtopicStatus, 1, true, "online"); token.Wait() && token.Error() != nil {
+ return token.Error()
+ }
+
+ backends.Log().Debug("MQTT client successfully started and connected")
+
+ return nil
+ })
+
+ backends.Svc.AddInitializer(initFunc)
+ return func(p backends.Processor) backends.Processor {
+ return backends.ProcessWith(
+ func(e *mail.Envelope, task backends.SelectTask) (backends.Result, error) {
+ if task == backends.TaskValidateRcpt {
+ // We don't validate the recipient
+ return p.Process(e, task)
+ } else if task == backends.TaskSaveMail {
+ err := processEmail(e, c, config)
+ if err != nil {
+ backends.Log().WithError(err).Error("Could not handle email")
+ return backends.NewResult("554 Error: could not handle email"), err
+ }
+
+ // call the next processor in the chain
+ return p.Process(e, task)
+ }
+ return p.Process(e, task)
+ },
+ )
+ }
+}