configuration files

1 files changed, 91 insertions, 0 deletions

diff --git a/client/config.go b/client/config.go
new file mode 100644
index 0000000..ad0eedb
--- /dev/null
+++ b/client/config.go
@@ -0,0 +1,91 @@
+package main
+
+import (
+	"path/filepath"
+	"strings"
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+)
+
+func getBaseConfigDir() (path string) {
+	path = os.Getenv("XDG_CONFIG_HOME")
+	if path != "" {
+		return
+	}
+	path = os.Getenv("APPDATA")
+	if path != "" {
+		return
+	}
+	if os.Getenv("HOME") != "" {
+		return filepath.Join(os.Getenv("HOME"), ".config")
+	} else {
+		return filepath.Join(filepath.Base(os.Args[0]), "config")
+	}
+}
+
+func getConfigDir() string {
+	return filepath.Join(getBaseConfigDir(), "talk")
+}
+
+func (a *application) executeScript(rd io.Reader) error {
+	var (
+		command strings.Builder
+		br = bufio.NewReader(rd)
+	)
+	for {
+		command.Reset()
+		command.WriteRune('/')
+		for {
+			c, _, err := br.ReadRune()
+			if err == io.EOF {
+				break
+			}
+			if err != nil {
+				return fmt.Errorf("error reading configuration: %s", err)
+			}
+			if c == '/' && command.Len() == 1 {
+				continue
+			}
+			if c == '\\' {
+				command.WriteRune(c)
+				c, _, _ = br.ReadRune()
+			} else if c == '#' {
+				for c != '\n' {
+					c, _, err = br.ReadRune()
+					if err != nil {
+						break
+					}
+				}
+			} else if c == '\n' {
+				break
+			}
+			command.WriteRune(c)
+		}
+		if strings.TrimSpace(command.String()) != "" {
+			a.processCommand(command.String())
+		}
+		_, err := br.Peek(1)
+		if err == io.EOF {
+			break
+		}
+	}
+	return nil
+}
+
+func (a *application) executeConfig(name string) error {
+	file, err := os.Open(filepath.Join(getConfigDir(), name))
+	if err != nil {
+		return fmt.Errorf("error reading configuration: %s", err)
+	}
+	return a.executeScript(file)
+}
+
+func (a *application) executeConfigOptional(name string) (err error) {
+	err = a.executeConfig(name)
+	if os.IsNotExist(err) {
+		return nil
+	}
+	return
+}