Initial commit

lib/appcontext/appcontext.go

@@ -0,0 +1,74 @@
+package appcontext
+
+import (
+	"log"
+	// stdlib
+	"encoding/json"
+	"net/http"
+	"os"
+	// 3rd-party
+	"lab.pztrn.name/golibs/flagger"
+	"lab.pztrn.name/golibs/mogrus"
+	// local
+	"lab.pztrn.name/fat0troll/wind8_fetcher/lib/config"
+)
+
+// Context is an application context struct
+type Context struct {
+	Cfg           *config.Config
+	HTTPServerMux *http.ServeMux
+	Log           *mogrus.LoggerHandler
+	StartupFlags  *flagger.Flagger
+}
+
+// Init is an initialization function for context
+func (c *Context) Init() {
+	l := mogrus.New()
+	l.Initialize()
+	c.Log = l.CreateLogger("stdout")
+	c.Log.CreateOutput("stdout", os.Stdout, true)
+
+	c.Cfg = config.New()
+
+	c.StartupFlags = flagger.New(c.Log)
+	c.StartupFlags.Initialize()
+	c.HTTPServerMux = http.NewServeMux()
+}
+
+// InitializeConfig fills config struct with data from given file
+func (c *Context) InitializeConfig(configPath string) {
+	c.Cfg.Init(c.Log, configPath)
+}
+
+// InitializeStartupFlags gives information about available startup flags
+func (c *Context) InitializeStartupFlags() {
+	configFlag := flagger.Flag{}
+	configFlag.Name = "config"
+	configFlag.Description = "Configuration file path"
+	configFlag.Type = "string"
+	configFlag.DefaultValue = "config.yaml"
+	err := c.StartupFlags.AddFlag(&configFlag)
+	if err != nil {
+		c.Log.Errorln(err)
+	}
+}
+
+// StartHTTPListener starts HTTP server on given port
+func (c *Context) StartHTTPListener() {
+	response := make(map[string]string)
+	responseBody := make([]byte, 0)
+	c.HTTPServerMux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Add("Content-Type", "application/json; charset=utf-8")
+		w.WriteHeader(404)
+		response["status"] = "error"
+		response["error_coder"] = "404"
+		response["descirption"] = "Not found."
+
+		responseBody, _ = json.Marshal(response)
+		w.Write(responseBody)
+	})
+
+	c.Log.Info("HTTP server started at http://" + c.Cfg.HTTPListener.Host + ":" + c.Cfg.HTTPListener.Port)
+	err := http.ListenAndServe(c.Cfg.HTTPListener.Host+":"+c.Cfg.HTTPListener.Port, c.HTTPServerMux)
+	log.Fatalln(err)
+}

lib/appcontext/exported.go

@@ -0,0 +1,11 @@
+package appcontext
+
+var (
+	a *Context
+)
+
+// New is a Context creation function
+func New() *Context {
+	c := &Context{}
+	return c
+}