Settings are now given through TEAMS/settings.json instead of been given through command line arguments

settings/settings.go

@@ -0,0 +1,97 @@
+package settings
+
+import (
+	"encoding/json"
+	"log"
+	"os"
+	"path"
+	"time"
+
+	"gopkg.in/fsnotify.v1"
+)
+
+const SettingsFile = "settings.json"
+
+type FICSettings struct {
+	Start			time.Time `json:"start"`
+	End			time.Time `json:"end"`
+
+	FirstBlood		float64   `json:"firstBlood"`
+	SubmissionCostBase	float64   `json:"submissionCostBase"`
+
+	AllowRegistration	bool      `json:"allowRegistration"`
+	DenyNameChange		bool      `json:"denyNameChange"`
+	EnableResolutionRoute	bool      `json:"enableResolutionRoute"`
+	PartialValidation	bool      `json:"partialValidation"`
+	EnableExerciceDepend	bool      `json:"enableExerciceDepend"`
+}
+
+func ReadSettings(path string) (FICSettings, error) {
+	var s FICSettings
+	if fd, err := os.Open(path); err != nil {
+		return s, err
+	} else {
+		defer fd.Close()
+		jdec := json.NewDecoder(fd)
+
+		if err := jdec.Decode(&s); err != nil {
+			return s, err
+		}
+
+		return s, nil
+	}
+}
+
+func SaveSettings(path string, s FICSettings) error {
+	if fd, err := os.Create(path); err != nil {
+		return err
+	} else {
+		defer fd.Close()
+		jenc := json.NewEncoder(fd)
+
+		if err := jenc.Encode(s); err != nil {
+			return err
+		}
+
+		return nil
+	}
+}
+
+func LoadAndWatchSettings(settingsPath string, reload func (FICSettings)) {
+	// First load of configuration if it exists
+	if _, err := os.Stat(settingsPath); !os.IsNotExist(err) {
+		if config, err := ReadSettings(settingsPath); err != nil {
+			log.Println("ERROR: Unable to read challenge settings:", err)
+		} else {
+			reload(config)
+		}
+	}
+
+	// Watch the configuration file
+	if watcher, err := fsnotify.NewWatcher(); err != nil {
+		log.Fatal(err)
+	} else {
+		if err := watcher.Add(path.Dir(settingsPath)); err != nil {
+			log.Fatal("Unable to watch: ", path.Dir(settingsPath), ": ", err)
+		}
+
+		go func() {
+			defer watcher.Close()
+			for {
+				select {
+				case ev := <-watcher.Events:
+					if path.Base(ev.Name) == SettingsFile && ev.Op & fsnotify.Write == fsnotify.Write {
+						log.Println("Settings file changes, reloading it!")
+						if config, err := ReadSettings(settingsPath); err != nil {
+							log.Println("ERROR: Unable to read challenge settings:", err)
+						} else {
+							reload(config)
+						}
+					}
+				case err := <-watcher.Errors:
+					log.Println("watcher error:", err)
+				}
+			}
+		}()
+	}
+}