From 65b8fb514db9fc5125494b3393699bf666ed9cb2 Mon Sep 17 00:00:00 2001
From: Ben Burwell <ben@benburwell.com>
Date: Thu, 24 May 2018 23:19:26 -0400
Subject: Get lat/long from config file

---
 Makefile     |  2 +-
 colortemp.go |  9 +++------
 config.go    | 39 +++++++++++++++++++++++++++++++++++++++
 main.go      | 16 ++++++++++++++--
 4 files changed, 57 insertions(+), 9 deletions(-)
 create mode 100644 config.go

diff --git a/Makefile b/Makefile
index 230b023..f76c3c2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,2 +1,2 @@
-phlux: main.go colortemp.go
+phlux: main.go colortemp.go config.go
 	go build .
diff --git a/colortemp.go b/colortemp.go
index 8cf3454..f7209a1 100644
--- a/colortemp.go
+++ b/colortemp.go
@@ -11,18 +11,15 @@ import (
 
 type ColorTemperature uint
 
-const LATITUDE = 42.348333
-const LONGITUDE = 71.1675
-
 // Get the correct color temperature for a given time. If the time is between
 // sunrise and sunset, a high CT is selected. Otherise, during night, a low
 // color temperature is used.
 //
 // TODO: This is a naive approach and should be revisited
-func getDesiredColorTemperature(t time.Time) ColorTemperature {
+func getDesiredColorTemperature(t time.Time, latitude, longitude float64) ColorTemperature {
 	log.Printf("Calculating sunrise/sunset for: %s\n", t.Format(time.RFC3339))
-	sunrise := astrotime.CalcSunrise(t, LATITUDE, LONGITUDE)
-	sunset := astrotime.CalcSunset(t, LATITUDE, LONGITUDE)
+	sunrise := astrotime.CalcSunrise(t, latitude, longitude)
+	sunset := astrotime.CalcSunset(t, latitude, longitude)
 	log.Printf("Sunrise: %s, Sunset: %s\n", sunrise.Format(time.RFC3339), sunset.Format(time.RFC3339))
 	if t.After(sunrise) && t.Before(sunset) {
 		log.Println("Daytime, setting high CT")
diff --git a/config.go b/config.go
new file mode 100644
index 0000000..a12a240
--- /dev/null
+++ b/config.go
@@ -0,0 +1,39 @@
+package main
+
+import (
+	"io/ioutil"
+	"log"
+
+	"github.com/BurntSushi/xdg"
+	"gopkg.in/yaml.v2"
+)
+
+const XDG_CONFIG_NAME = "phlux"
+
+type PhluxConfig struct {
+	Latitude  float64 `yaml:"latitude"`
+	Longitude float64 `yaml:"longitude"`
+	Bridges   []struct {
+		BridgeID string `yaml:"id"`
+		Token    string `yaml:"token"`
+	} `yaml:"bridges"`
+}
+
+func (c *PhluxConfig) Read() {
+	var paths xdg.Paths
+	configFile, err := paths.ConfigFile(XDG_CONFIG_NAME)
+	if err != nil {
+		log.Printf("No config file found: %s\n", err.Error())
+		return
+	}
+	yamlFile, err := ioutil.ReadFile(configFile)
+	if err != nil {
+		log.Printf("Error reading config file %s: %s\n", configFile, err.Error())
+		return
+	}
+	err = yaml.Unmarshal(yamlFile, c)
+	if err != nil {
+		log.Printf("Error unmarshalling yaml: %s\n", err.Error())
+		return
+	}
+}
diff --git a/main.go b/main.go
index 76f5838..6253cbb 100644
--- a/main.go
+++ b/main.go
@@ -11,12 +11,16 @@ import (
 const username = "phlux"
 
 func main() {
+	var config PhluxConfig
+	config.Read()
+	log.Println("Config:", config)
+
 	bridges, err := hue.FindBridges()
 	if err != nil {
 		log.Fatalf("Error finding bridges: %s\n", err.Error())
 	}
 	log.Printf("Found %d bridge(s)\n", len(bridges))
-	desiredColorTemp := getDesiredColorTemperature(time.Now())
+	desiredColorTemp := getDesiredColorTemperature(time.Now(), config.Latitude, config.Longitude)
 	for _, bridge := range bridges {
 		log.Printf("Bridge: %s\n", bridge.IPAddress)
 		updateBridge(bridge, desiredColorTemp)
@@ -31,9 +35,17 @@ func updateBridge(bridge hue.Bridge, ct ColorTemperature) {
 	//fmt.Printf("Made user %s for bridge %s\n", username, bridge.IPAddress)
 	err := bridge.Login(os.Getenv("HUE_LOGIN"))
 	if err != nil {
-		log.Fatalf("Could not log in to bridge: %s", err.Error())
+		log.Fatalf("Could not log in to bridge: %s\n", err.Error())
 	}
 	log.Println("Logged in to bridge")
+
+	config, err := bridge.GetConfig()
+	if err != nil {
+		log.Fatalf("Could not get bridge info: %s\n", err.Error())
+	}
+	log.Printf("Bridge name: %s\n", config.Name)
+	log.Printf("Bridge ID: %s\n", config.BridgeID)
+
 	lights, err := bridge.GetAllLights()
 	if err != nil {
 		log.Fatalf("Error getting lights: %s\n", err.Error())
-- 
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