commit e241319e6eef8b660d7ead5cb590c97e5d4b5dc0
Author: Wolfgang Hottgenroth <wolfgang.hottgenroth@icloud.com>
Date:   Sun Dec 1 15:56:24 2024 +0100

    initial

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bd0cd5f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+src/udi/udi
+src/udi/main
+src/udi/migrate_schema
+tmp/
+ENVDB
+ENVDB.cluster
+deployment/secrets.txt
+deployment/secrets
diff --git a/src/ma/archiver/archiver.go b/src/ma/archiver/archiver.go
new file mode 100644
index 0000000..e402257
--- /dev/null
+++ b/src/ma/archiver/archiver.go
@@ -0,0 +1,33 @@
+package archiver
+
+import "log"
+import "time"
+import "os"
+import "fmt"
+import "net/url"
+import "ma/mqtt"
+import "ma/config"
+import "ma/counter"
+import "ma/database"
+
+
+func InitArchiver() {
+  log.Printf("Archiver initializing")
+}
+
+func InputArchiver() {
+  for {
+    select {
+    case mqttMessage := <- mqtt.InputChannel:
+      message := database.Message { time.Now(), mqttMessage.Topic, string(mqttMessage.Payload) }
+      archiverChannel <- message
+      handleMessage(message)
+    }
+  }
+}
+
+func handleMessage(message database.MessageT) {
+  log.Printf("Archiving %", message)
+  counter.S("Stored")
+}
+
diff --git a/src/ma/config/config.go b/src/ma/config/config.go
new file mode 100644
index 0000000..04718f1
--- /dev/null
+++ b/src/ma/config/config.go
@@ -0,0 +1,33 @@
+package config
+
+import "encoding/json"
+import "log"
+import "os"
+
+type HandlerConfigT struct {
+  Attributes map[string]string `json:"attributes"`
+}
+
+type ConfigT struct {
+  Mqtt struct {
+    Broker string `json:"broker"`
+    Username string `json:"username"`
+    Password string
+    TlsEnable string `json:"tlsEnable"`
+  } `json:"mqtt"`
+  IncludeTopics []string `json:"includeTopics"`
+  ExcludeTopics []string `json:"excludeTopics"`
+}
+
+var Config ConfigT
+
+
+func LoadConfiguration() {
+  err := json.Unmarshal([]byte(os.Getenv("MA_CONF")), &Config)
+  if err != nil {
+    log.Fatalf("Unable to parse configuration: %s", err)
+  }
+
+  Config.Mqtt.Password = os.Getenv("MQTT_PASSWORD")
+}
+
diff --git a/src/ma/counter/counter.go b/src/ma/counter/counter.go
new file mode 100644
index 0000000..a898b13
--- /dev/null
+++ b/src/ma/counter/counter.go
@@ -0,0 +1,87 @@
+package counter
+
+import (
+  "log"
+  "time"
+  "encoding/json"
+)
+
+type statsTuple_t struct {
+  Successful int `json:"good"`
+  Failed int `json:"bad"`
+}
+
+type stats_t struct {
+  Received statsTuple_t `json:"received"`
+  Stored statsTuple_t `json:"stored"`
+  Skipped statsTuple_t `json:"skipped"`
+}
+
+var stats stats_t
+
+func S(id string) {
+  switch id {
+  case "Received": 
+    stats.Received.Successful = stats.Received.Successful + 1
+  case "Stored":
+    stats.Stored.Successful += 1
+  case "Skipped":
+    stats.Skipped.Successful += 1
+  default:
+    log.Printf("Unknown stats id %s", id)
+  }
+}
+
+func F(id string) {
+  switch id {
+  case "Received": 
+    stats.Received.Failed += 1
+  case "Stored":
+    stats.Stored.Failed += 1
+  case "Skipped":
+    stats.Skipped.Failed += 1
+  default:
+    log.Printf("Unknown stats id %s", id)
+  }
+}
+
+func SH(id string) {
+  if _, ok := stats.Handled[id]; ok {
+    tuple := stats.Handled[id]
+    tuple.Successful += 1
+    stats.Handled[id] = tuple
+  } else {
+    stats.Handled[id] = statsTuple_t { Successful:1, Failed:0, }
+  }
+}
+
+func FH(id string) {
+  if _, ok := stats.Handled[id]; ok {
+    tuple := stats.Handled[id]
+    tuple.Failed += 1
+    stats.Handled[id] = tuple
+  } else {
+    stats.Handled[id] = statsTuple_t { Successful:0, Failed:1, }
+  }
+}
+
+func InitCounter() {
+  stats = stats_t {
+    Received: statsTuple_t {Successful:0,Failed:0,},
+    Stored: statsTuple_t {Successful:0,Failed:0,},
+    Skipped: statsTuple_t {Successful:0,Failed:0,},
+    Handled: make(map[string]statsTuple_t),
+  }
+
+  go func() { 
+    for {
+      sj, err := json.Marshal(stats)
+      if err != nil {
+        log.Printf("Unable to marshal stats object: %s", err)
+      }
+      log.Println(string(sj))
+      time.Sleep(time.Second * 60)
+    }
+  }()
+}
+
diff --git a/src/ma/database/abstract_database.go b/src/ma/database/abstract_database.go
new file mode 100644
index 0000000..fec2d7d
--- /dev/null
+++ b/src/ma/database/abstract_database.go
@@ -0,0 +1,12 @@
+package database
+
+import "time"
+import "gorm.io/gorm"
+
+
+type Message struct {
+  Time time.Time `gorm:"not null;primary_key"`
+  Topic string `gorm:"not null"`
+  Payload string `gorm:"not null"`
+}
+
diff --git a/src/ma/database/database.go b/src/ma/database/database.go
new file mode 100644
index 0000000..323c665
--- /dev/null
+++ b/src/ma/database/database.go
@@ -0,0 +1,53 @@
+package database
+
+
+import (
+  "log"
+  //"time"
+  "fmt"
+  "ma/counter"
+  "gorm.io/driver/postgres"
+  "gorm.io/gorm"
+)
+
+type DatabaseHandle struct {
+  initialized bool
+  dbh *gorm.DB 
+}
+
+func NewDatabaseHandle() *DatabaseHandle {
+  var db DatabaseHandle
+  // inject the whole database configuration via the well-known PG* env variables
+  conn, err := gorm.Open(postgres.Open(""))
+  if err != nil {
+    log.Printf("Unable to open database connection: %s", err)
+    db.initialized = false
+  } else {
+    db.dbh = conn
+    db.initialized = true
+    //log.Println("Database connection opened")
+  }
+  return &db
+}
+
+func (self *DatabaseHandle) StoreMessage(message *Message) {
+  if ! self.initialized {
+    log.Printf("Database connection not initialized, can not store, message %s lost", message)
+    counter.F("Stored")
+    return
+  }
+
+  result := self.dbh.Create(message)
+  if result.Error != nil {
+    log.Printf("Unable to insert, message %s lost, error: %s", message, result.Error)
+    counter.F("Stored")
+    return
+  }
+
+  //log.Println("Successfully stored message")
+  counter.S("Stored")
+}
+
+
+
+
diff --git a/src/ma/database/migrate_database.go b/src/ma/database/migrate_database.go
new file mode 100644
index 0000000..97050fc
--- /dev/null
+++ b/src/ma/database/migrate_database.go
@@ -0,0 +1,22 @@
+package database
+
+import (
+  "log"
+  //"time"
+  "gorm.io/driver/postgres"
+  "gorm.io/gorm"
+)
+
+func Migrate() {
+  dsn := ""
+  db, err := gorm.Open(postgres.Open(dsn))
+  if err != nil {
+    log.Fatalf("Unable to open database connection: %s", err)
+  }
+
+  db.AutoMigrate(&Message{})
+  log.Println("Message created")
+
+  log.Println("Remember to call create_hypertable on message, sowhat I can't do that for you.")
+}
+
diff --git a/src/ma/database/schema.sql b/src/ma/database/schema.sql
new file mode 100644
index 0000000..1284842
--- /dev/null
+++ b/src/ma/database/schema.sql
@@ -0,0 +1,7 @@
+create extension if not exists timescaledb;
+
+
+select create_hypertable('message', 'time');
+
+
+
diff --git a/src/ma/go.mod b/src/ma/go.mod
new file mode 100644
index 0000000..17205bc
--- /dev/null
+++ b/src/ma/go.mod
@@ -0,0 +1,24 @@
+module ma
+
+go 1.21.3
+
+require (
+	github.com/eclipse/paho.mqtt.golang v1.5.0
+	github.com/google/uuid v1.6.0
+	gorm.io/driver/postgres v1.5.10
+	gorm.io/gorm v1.25.12
+)
+
+require (
+	github.com/gorilla/websocket v1.5.3 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect
+	github.com/jackc/pgx/v5 v5.5.5 // indirect
+	github.com/jackc/puddle/v2 v2.2.1 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	golang.org/x/crypto v0.25.0 // indirect
+	golang.org/x/net v0.27.0 // indirect
+	golang.org/x/sync v0.7.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
+)
diff --git a/src/ma/go.sum b/src/ma/go.sum
new file mode 100644
index 0000000..47a8c4d
--- /dev/null
+++ b/src/ma/go.sum
@@ -0,0 +1,44 @@
+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/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/eclipse/paho.mqtt.golang v1.5.0 h1:EH+bUVJNgttidWFkLLVKaQPGmkTUfQQqjOsyvMGvD6o=
+github.com/eclipse/paho.mqtt.golang v1.5.0/go.mod h1:du/2qNQVqJf/Sqs4MEL77kR8QTqANF7XU7Fk0aOTAgk=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
+github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
+github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a h1:bbPeKD0xmW/Y25WS6cokEszi5g+S0QxI/d45PkRi7Nk=
+github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a/go.mod h1:5TJZWKEWniPve33vlWYSoGYefn3gLQRzjfDlhSJ9ZKM=
+github.com/jackc/pgx/v5 v5.5.5 h1:amBjrZVmksIdNjxGW/IiIMzxMKZFelXbUoPNb+8sjQw=
+github.com/jackc/pgx/v5 v5.5.5/go.mod h1:ez9gk+OAat140fv9ErkZDYFWmXLfV+++K0uAOiwgm1A=
+github.com/jackc/puddle/v2 v2.2.1 h1:RhxXJtFG022u4ibrCSMSiu5aOq1i77R3OHKNJj77OAk=
+github.com/jackc/puddle/v2 v2.2.1/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
+github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
+github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
+github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
+github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
+github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+golang.org/x/crypto v0.25.0 h1:ypSNr+bnYL2YhwoMt2zPxHFmbAN1KZs/njMG3hxUp30=
+golang.org/x/crypto v0.25.0/go.mod h1:T+wALwcMOSE0kXgUAnPAHqTLW+XHgcELELW8VaDgm/M=
+golang.org/x/net v0.27.0 h1:5K3Njcw06/l2y9vpGCSdcxWOYHOUk3dVNGDXN+FvAys=
+golang.org/x/net v0.27.0/go.mod h1:dDi0PyhWNoiUOrAS8uXv/vnScO4wnHQO4mj9fn/RytE=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gorm.io/driver/postgres v1.5.10 h1:7Lggqempgy496c0WfHXsYWxk3Th+ZcW66/21QhVFdeE=
+gorm.io/driver/postgres v1.5.10/go.mod h1:DX3GReXH+3FPWGrrgffdvCk3DQ1dwDPdmbenSkweRGI=
+gorm.io/gorm v1.25.12 h1:I0u8i2hWQItBq1WfE0o2+WuL9+8L21K9e2HHSTE/0f8=
+gorm.io/gorm v1.25.12/go.mod h1:xh7N7RHfYlNc5EmcI/El95gXusucDrQnHXe0+CgWcLQ=
diff --git a/src/ma/main.go b/src/ma/main.go
new file mode 100644
index 0000000..45496b9
--- /dev/null
+++ b/src/ma/main.go
@@ -0,0 +1,37 @@
+package main
+
+import "log"
+import "os"
+import "os/signal"
+import "ma/mqtt"
+import "ma/config"
+import "ma/counter"
+import "ma/archiver"
+
+
+
+func main() {
+  log.SetPrefix("MA: ")
+  log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
+
+  log.Println("MA starting")
+
+  config.LoadConfiguration()
+
+  archiver.InitArchiver()
+  go archiver.InputArchiver()
+
+  mqtt.StartMqttClient()
+  defer mqtt.StopMqttClient()
+
+  counter.InitCounter()
+
+  log.Println("MA running")
+
+  c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt, os.Kill)
+	<-c
+
+  log.Println("Terminating MA")
+}
+
diff --git a/src/ma/migrate_schema.go b/src/ma/migrate_schema.go
new file mode 100644
index 0000000..b487da6
--- /dev/null
+++ b/src/ma/migrate_schema.go
@@ -0,0 +1,18 @@
+package main
+
+import "log"
+import "ma/database"
+
+
+
+func main() {
+  log.SetPrefix("UDI Migrate Schema: ")
+  log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
+
+  log.Println("Starting")
+
+  database.Migrate()
+
+  log.Println("Done")
+}
+
diff --git a/src/ma/mqtt/mqtt.go b/src/ma/mqtt/mqtt.go
new file mode 100644
index 0000000..70a55cc
--- /dev/null
+++ b/src/ma/mqtt/mqtt.go
@@ -0,0 +1,147 @@
+package mqtt
+
+import "log"
+import "strings"
+import "fmt"
+import MQTT "github.com/eclipse/paho.mqtt.golang"
+import "github.com/google/uuid"
+import "crypto/tls"
+import "udi/config"
+import "udi/counter"
+
+type Message struct {
+  Topic string
+  Payload []byte
+}
+
+var InputChannel chan Message = make(chan Message, 100)
+var OutputChannel chan Message = make(chan Message, 100)
+
+var mqttClient MQTT.Client
+
+func onMessageReceived(client MQTT.Client, message MQTT.Message) {
+  // log.Printf("Message received, topic: %s, payload: %s\n", message.Topic(), message.Payload())
+  for _, i := range config.Config.ExcludeTopics {
+    if i == message.Topic {
+      counter.S("Skipped")
+      return
+    }
+  }
+
+  m := Message { 
+    Topic: message.Topic(), 
+    Payload: message.Payload(),
+  }
+  select {
+  case InputChannel <- m:
+    counter.S("Received")
+    {}
+    //log.Println("Message sent to channel")
+  default:
+    log.Println("Channel full, message lost")
+    counter.F("Received")
+  }
+}
+
+func onConnectionLost(client MQTT.Client, error error) {
+  log.Printf("Connection lost, error %s", error)
+}
+
+func onReconnecting(client MQTT.Client, clientOpts *MQTT.ClientOptions) {
+  log.Println("Oops, connection lost, already reconnecting ...")
+}
+
+
+func onConnect(client MQTT.Client) {
+  for _, topic := range config.Config.IncludeTopics {
+    if token := client.Subscribe(topic, 0, onMessageReceived); token.Wait() && token.Error() != nil {
+      log.Fatalf("Unable to subscribe to topic %s, error %s", topic, token.Error())
+    }
+    log.Printf("Topic %s subscribed", topic)
+  }
+}
+
+func outputDispatcher(client MQTT.Client) {
+  for {
+    select {
+    case message := <- OutputChannel:
+      log.Printf("Message arrived in outputDispatcher, topic: %s, payload: %s\n", message.Topic, message.Payload)
+      if token := client.Publish(message.Topic, 0, false, message.Payload); token.Wait() && token.Error() != nil {
+        log.Printf("Unable to publish, error %s", token.Error())
+      }
+      log.Println("Successfully published")
+    }
+  }
+}
+
+func StartMqttClient() {
+  broker := config.Config.Mqtt.Broker
+  if broker == "" {
+    log.Fatal("No broker given, set env var MQTT_BROKER")
+  }
+
+  prefix := "MA"
+  uuid := uuid.New()
+  clientId := fmt.Sprintf("%s-%s", prefix, uuid)
+
+  opts := MQTT.NewClientOptions().
+    AddBroker(broker).
+    SetClientID(clientId).
+    SetConnectionLostHandler(onConnectionLost).
+    SetOnConnectHandler(onConnect).
+    SetReconnectingHandler(onReconnecting).
+    SetConnectRetry(true)
+
+  username := config.Config.Mqtt.Username
+  if username != "" {
+    opts.SetUsername(username)
+  }
+
+  password := config.Config.Mqtt.Password
+  if password != "" {
+    opts.SetPassword(password)
+  }
+
+  enableTls := config.Config.Mqtt.TlsEnable
+  if enableTls == "true" {
+    //log.Println("Enabling TLS connection")
+    tlsConfig := &tls.Config { 
+      InsecureSkipVerify: true, 
+    }
+    opts.SetTLSConfig(tlsConfig)
+	}
+
+  log.Println("Broker connecting")
+  mqttClient = MQTT.NewClient(opts)
+  if token := mqttClient.Connect(); token.Wait() && token.Error() != nil {
+    log.Fatalf("Unable to connect to broker %s, error %s", broker, token.Error())
+  }
+  //log.Printf("Successfully connected to broker %s", broker)
+
+  go outputDispatcher(mqttClient)
+
+  return
+}
+
+func StopMqttClient() {
+  log.Println("Disconnecting from broker")
+  mqttClient.Disconnect(250)
+}
+
+func TopicMatchesSubscription(topic, subscription string) bool {
+	topicSegments := strings.Split(topic, "/")
+	subscriptionSegments := strings.Split(subscription, "/")
+
+	for i, subSegment := range subscriptionSegments {
+		if subSegment == "+" {
+			continue
+		} else if subSegment == "#" {
+			return true
+		} else if i < len(topicSegments) && subSegment != topicSegments[i] {
+			return false
+		}
+	}
+
+	return true
+}
+