Initial commit

config/config.go

@@ -0,0 +1,113 @@
+package config
+
+import (
+	"bufio"
+	"errors"
+	"io"
+	"os"
+	"strings"
+)
+
+type config struct {
+	ListenAddress        string
+	ClientName           string
+	ClientScope          string
+	ClientWebsite        string
+	StaticDirectory      string
+	TemplatesGlobPattern string
+	DatabasePath         string
+	Logfile              string
+}
+
+func (c *config) IsValid() bool {
+	if len(c.ListenAddress) < 1 ||
+		len(c.ClientName) < 1 ||
+		len(c.ClientScope) < 1 ||
+		len(c.ClientWebsite) < 1 ||
+		len(c.StaticDirectory) < 1 ||
+		len(c.TemplatesGlobPattern) < 1 ||
+		len(c.DatabasePath) < 1 {
+		return false
+	}
+	return true
+}
+
+func getDefaultConfig() *config {
+	return &config{
+		ListenAddress:        ":8080",
+		ClientName:           "web",
+		ClientScope:          "read write follow",
+		ClientWebsite:        "http://localhost:8080",
+		StaticDirectory:      "static",
+		TemplatesGlobPattern: "templates/*",
+		DatabasePath:         "database.db",
+		Logfile:              "",
+	}
+}
+
+func Parse(r io.Reader) (c *config, err error) {
+	c = getDefaultConfig()
+	scanner := bufio.NewScanner(r)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+
+		if len(line) < 1 {
+			continue
+		}
+
+		index := strings.IndexRune(line, '#')
+		if index == 0 {
+			continue
+		}
+
+		index = strings.IndexRune(line, '=')
+		if index < 1 {
+			return nil, errors.New("invalid config key")
+		}
+
+		key := strings.TrimSpace(line[:index])
+		val := strings.TrimSpace(line[index+1 : len(line)])
+
+		switch key {
+		case "listen_address":
+			c.ListenAddress = val
+		case "client_name":
+			c.ClientName = val
+		case "client_scope":
+			c.ClientScope = val
+		case "client_website":
+			c.ClientWebsite = val
+		case "static_directory":
+			c.StaticDirectory = val
+		case "templates_glob_pattern":
+			c.TemplatesGlobPattern = val
+		case "database_path":
+			c.DatabasePath = val
+		case "logfile":
+			c.Logfile = val
+		default:
+			return nil, errors.New("invliad config key " + key)
+		}
+	}
+
+	return
+}
+
+func ParseFile(file string) (c *config, err error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return
+	}
+	defer f.Close()
+
+	info, err := f.Stat()
+	if err != nil {
+		return
+	}
+
+	if info.IsDir() {
+		return nil, errors.New("invalid config file")
+	}
+
+	return Parse(f)
+}