Added subday module with a subday handlers

modules/subday/subday.go

@@ -0,0 +1,73 @@
+package subday
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"sync"
+
+	"galched-bot/modules/settings"
+)
+
+type Subday struct {
+	sync.RWMutex
+	path     string
+	database map[string][]string
+}
+
+func New(s *settings.Settings) (*Subday, error) {
+	var (
+		err  error
+		data = make(map[string][]string)
+	)
+
+	subdayData, err := ioutil.ReadFile(s.SubdayDataPath)
+	if err != nil {
+		log.Print("subday: cannot read subday data file", err)
+		log.Print("subday: creating new subday database")
+	} else {
+		err = json.Unmarshal(subdayData, &data)
+		if err != nil {
+			data = make(map[string][]string)
+			log.Print("subday: cannot unmarshal subday data file", err)
+			log.Print("subday: creating new subday database")
+		} else {
+			log.Print("subday: using previously saved subday database")
+		}
+	}
+
+	subday := &Subday{
+		RWMutex:  sync.RWMutex{},
+		path:     s.SubdayDataPath,
+		database: data,
+	}
+	return subday, nil
+}
+
+func (s *Subday) Database() map[string][]string {
+	return s.database
+}
+
+func (s *Subday) DumpToFile() {
+	data, err := json.Marshal(s.database)
+	if err != nil {
+		log.Print("subday: cannot marshal database file", err)
+		return
+	}
+	file, err := os.Create(s.path)
+	if err != nil {
+		log.Print("subday: cannot open database file", err)
+		return
+	}
+	_, err = fmt.Fprintf(file, string(data))
+	if err != nil {
+		log.Print("subday: cannot write to database file")
+	}
+	err = file.Close()
+	if err != nil {
+		log.Print("subday: cannot close database file")
+	}
+	log.Print("subday: database dumped to file")
+}