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package main
import (
"bytes"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"os"
"reflect"
"strconv"
)
//-------------------------------------------------------------------------
// config
//
// Structure represents persistent config storage of the gocode daemon. Usually
// the config is located somewhere in ~/.config/gocode directory.
//-------------------------------------------------------------------------
type config struct {
ProposeBuiltins bool `json:"propose-builtins"`
LibPath string `json:"lib-path"`
Autobuild bool `json:"autobuild"`
ForceDebugOutput string `json:"force-debug-output"`
}
var g_config = config{
ProposeBuiltins: false,
LibPath: "",
Autobuild: false,
ForceDebugOutput: "",
}
var g_string_to_bool = map[string]bool{
"t": true,
"true": true,
"y": true,
"yes": true,
"on": true,
"1": true,
"f": false,
"false": false,
"n": false,
"no": false,
"off": false,
"0": false,
}
func set_value(v reflect.Value, value string) {
switch t := v; t.Kind() {
case reflect.Bool:
v, ok := g_string_to_bool[value]
if ok {
t.SetBool(v)
}
case reflect.String:
t.SetString(value)
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
v, err := strconv.ParseInt(value, 10, 64)
if err == nil {
t.SetInt(v)
}
case reflect.Float32, reflect.Float64:
v, err := strconv.ParseFloat(value, 64)
if err == nil {
t.SetFloat(v)
}
}
}
func list_value(v reflect.Value, name string, w io.Writer) {
switch t := v; t.Kind() {
case reflect.Bool:
fmt.Fprintf(w, "%s %v\n", name, t.Bool())
case reflect.String:
fmt.Fprintf(w, "%s \"%v\"\n", name, t.String())
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
fmt.Fprintf(w, "%s %v\n", name, t.Int())
case reflect.Float32, reflect.Float64:
fmt.Fprintf(w, "%s %v\n", name, t.Float())
}
}
func (this *config) list() string {
str, typ := this.value_and_type()
buf := bytes.NewBuffer(make([]byte, 0, 256))
for i := 0; i < str.NumField(); i++ {
v := str.Field(i)
name := typ.Field(i).Tag.Get("json")
list_value(v, name, buf)
}
return buf.String()
}
func (this *config) list_option(name string) string {
str, typ := this.value_and_type()
buf := bytes.NewBuffer(make([]byte, 0, 256))
for i := 0; i < str.NumField(); i++ {
v := str.Field(i)
nm := typ.Field(i).Tag.Get("json")
if nm == name {
list_value(v, name, buf)
}
}
return buf.String()
}
func (this *config) set_option(name, value string) string {
str, typ := this.value_and_type()
buf := bytes.NewBuffer(make([]byte, 0, 256))
for i := 0; i < str.NumField(); i++ {
v := str.Field(i)
nm := typ.Field(i).Tag.Get("json")
if nm == name {
set_value(v, value)
list_value(v, name, buf)
}
}
this.write()
return buf.String()
}
func (this *config) value_and_type() (reflect.Value, reflect.Type) {
v := reflect.ValueOf(this).Elem()
return v, v.Type()
}
func (this *config) write() error {
data, err := json.Marshal(this)
if err != nil {
return err
}
// make sure config dir exists
dir := config_dir()
if !file_exists(dir) {
os.MkdirAll(dir, 0755)
}
f, err := os.Create(config_file())
if err != nil {
return err
}
defer f.Close()
_, err = f.Write(data)
if err != nil {
return err
}
return nil
}
func (this *config) read() error {
data, err := ioutil.ReadFile(config_file())
if err != nil {
return err
}
err = json.Unmarshal(data, this)
if err != nil {
return err
}
return nil
}
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