add or update program

web.go

@@ -3,13 +3,52 @@ package main
 import (
 	"encoding/json"
 	"html/template"
+	"io/ioutil"
+	"log"
 	"net/http"
+	"path/filepath"
+	"reflect"
 
+	"github.com/go-yaml/yaml"
 	"github.com/gorilla/mux"
 )
 
 type Supervisor struct {
 	ConfigDir string
+	pgs       []*Program
+	pgMap     map[string]*Program
+}
+
+func (s *Supervisor) programPath() string {
+	return filepath.Join(s.ConfigDir, "programs.yml")
+}
+
+func (s *Supervisor) addOrUpdateProgram(pg Program) {
+	origPg, ok := s.pgMap[pg.Name]
+	if ok {
+		if !reflect.DeepEqual(origPg, &pg) {
+			log.Println("Update:", pg.Name)
+		}
+	} else {
+		s.pgs = append(s.pgs, &pg)
+		s.pgMap[pg.Name] = &pg
+		log.Println("Add:", pg.Name)
+	}
+}
+
+func (s *Supervisor) loadDB() error {
+	data, err := ioutil.ReadFile(s.programPath())
+	if err != nil {
+		data = []byte("")
+	}
+	pgs := make([]Program, 0)
+	if err = yaml.Unmarshal(data, pgs); err != nil {
+		return err
+	}
+	for _, pg := range pgs {
+		s.addOrUpdateProgram(pg)
+	}
+	return nil
 }
 
 func (s *Supervisor) Index(w http.ResponseWriter, r *http.Request) {
@@ -18,10 +57,23 @@ func (s *Supervisor) Index(w http.ResponseWriter, r *http.Request) {
 }
 
 func (s *Supervisor) AddProgram(w http.ResponseWriter, r *http.Request) {
+	pg := Program{
+		Name:    r.FormValue("name"),
+		Command: r.FormValue("command"),
+	}
 	w.Header().Set("Content-Type", "application/json")
-	data, _ := json.Marshal(map[string]interface{}{
-		"status": 0,
-	})
+	var data []byte
+	if _, ok := s.pgMap[pg.Name]; ok {
+		data, _ = json.Marshal(map[string]interface{}{
+			"status": 1,
+		})
+	} else {
+		s.addOrUpdateProgram(pg)
+
+		data, _ = json.Marshal(map[string]interface{}{
+			"status": 0,
+		})
+	}
 	w.Write(data)
 }