*: environment variables

Signed-off-by: Máximo Cuadros <mcuadros@gmail.com>

Author: mcuadros

debian/local/octoprint-tft-environment

@@ -1,2 +1,15 @@
-OCTOPRINT_TFT_STYLE_PATH=/opt/octoprint-tft/styles/default/
+# OctoPrint HTTP address, default http://localhost
+OCTOPRINT_HOST=
+
+# OctoPrint-TFT expects an API key to be supplied. This API key can be either
+# the globally configured one or a user specific one if “Access Control”.
+# http://docs.octoprint.org/en/master/api/general.html
 OCTOPRINT_APIKEY=
+
+# Location of the OctoPrint's config.yaml file, if OCTOPRINT_APIKEY is empty
+# a the gobal API will be read from the config file. If empty the file will
+# be search at the `pi` home folder or the current user.
+OCTOPRINT_CONFIG_FILE=
+
+# Location of the application theme.
+OCTOPRINT_TFT_STYLE_PATH=/opt/octoprint-tft/styles/default/

main.go

@@ -1,32 +1,50 @@
 package main
 
 import (
+	"io/ioutil"
 	"os"
+	"os/user"
+	"path/filepath"
+
+	yaml "gopkg.in/yaml.v1"
 
 	"github.com/gotk3/gotk3/gtk"
 	"github.com/mcuadros/OctoPrint-TFT/ui"
 )
 
 const (
-	EnvStylePath = "OCTOPRINT_TFT_STYLE_PATH"
-	EnvBaseURL   = "OCTOPRINT_HOST"
-	EnvAPIKey    = "OCTOPRINT_APIKEY"
+	EnvStylePath  = "OCTOPRINT_TFT_STYLE_PATH"
+	EnvBaseURL    = "OCTOPRINT_HOST"
+	EnvAPIKey     = "OCTOPRINT_APIKEY"
+	EnvConfigFile = "OCTOPRINT_CONFIG_FILE"
 
-	DefaultBaseURL = "http://127.0.0.1"
+	DefaultBaseURL = "http://localhost"
 )
 
 var (
-	BaseURL string
-	APIKey  string
+	BaseURL    string
+	APIKey     string
+	ConfigFile string
 )
 
 func init() {
 	ui.StylePath = os.Getenv(EnvStylePath)
-	BaseURL = os.Getenv(EnvBaseURL)
 	APIKey = os.Getenv(EnvAPIKey)
+
+	BaseURL = os.Getenv(EnvBaseURL)
 	if BaseURL == "" {
 		BaseURL = DefaultBaseURL
 	}
+
+	ConfigFile = os.Getenv(EnvConfigFile)
+	if ConfigFile == "" {
+		ConfigFile = findConfigFile()
+	}
+
+	if APIKey != "" && ConfigFile != "" {
+		APIKey = readAPIKey(ConfigFile)
+		ui.Logger.Infof("Found API key at %q file", ConfigFile)
+	}
 }
 
 func main() {
@@ -38,3 +56,48 @@ func main() {
 	ui.New(BaseURL, APIKey)
 	gtk.Main()
 }
+
+var (
+	configLocation = ".octoprint/config.yaml"
+	homeOctoPi     = "/home/pi/"
+)
+
+func readAPIKey(config string) string {
+	var cfg struct{ API struct{ Key string } }
+
+	data, err := ioutil.ReadFile(config)
+	if err != nil {
+		ui.Logger.Fatal(err)
+		return ""
+	}
+
+	if err := yaml.Unmarshal([]byte(data), &cfg); err != nil {
+		ui.Logger.Fatalf("Error decoding YAML config file %q: %s", config, err)
+		return ""
+	}
+
+	return cfg.API.Key
+}
+
+func findConfigFile() string {
+	if file := doFindConfigFile(homeOctoPi); file != "" {
+		return file
+	}
+
+	usr, err := user.Current()
+	if err != nil {
+		return ""
+	}
+
+	return doFindConfigFile(usr.HomeDir)
+}
+
+func doFindConfigFile(home string) string {
+	path := filepath.Join(home, configLocation)
+
+	if _, err := os.Stat(path); err == nil {
+		return path
+	}
+
+	return ""
+}

ui/system.go

@@ -63,7 +63,7 @@ func (m *systemPanel) createRestartButton() gtk.IWidget {
 
 	var cmd *octoprint.CommandDefinition
 	for _, c := range r.Core {
-		if c.Action == "restart" {
+		if c.Action == "reboot" {
 			cmd = c
 		}
 	}