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package revel
import (
"errors"
"github.com/robfig/config"
"path"
"strings"
)
// This handles the parsing of app.conf
// It has a "preferred" section that is checked first for option queries.
// If the preferred section does not have the option, the DEFAULT section is
// checked fallback.
type MergedConfig struct {
config *config.Config
section string // Check this section first, then fall back to DEFAULT
}
func LoadConfig(confName string) (*MergedConfig, error) {
var err error
for _, confPath := range ConfPaths {
conf, err := config.ReadDefault(path.Join(confPath, confName))
if err == nil {
return &MergedConfig{conf, ""}, nil
}
}
if err == nil {
err = errors.New("not found")
}
return nil, err
}
func (c *MergedConfig) SetSection(section string) {
c.section = section
}
func (c *MergedConfig) SetOption(name, value string) {
c.config.AddOption(c.section, name, value)
}
func (c *MergedConfig) Int(option string) (result int, found bool) {
result, err := c.config.Int(c.section, option)
if err == nil {
return result, true
}
if _, ok := err.(config.OptionError); ok {
return 0, false
}
// If it wasn't an OptionError, it must have failed to parse.
ERROR.Println("Failed to parse config option", option, "as int:", err)
return 0, false
}
func (c *MergedConfig) IntDefault(option string, dfault int) int {
if r, found := c.Int(option); found {
return r
}
return dfault
}
func (c *MergedConfig) Bool(option string) (result, found bool) {
result, err := c.config.Bool(c.section, option)
if err == nil {
return result, true
}
if _, ok := err.(config.OptionError); ok {
return false, false
}
// If it wasn't an OptionError, it must have failed to parse.
ERROR.Println("Failed to parse config option", option, "as bool:", err)
return false, false
}
func (c *MergedConfig) BoolDefault(option string, dfault bool) bool {
if r, found := c.Bool(option); found {
return r
}
return dfault
}
func (c *MergedConfig) String(option string) (result string, found bool) {
if r, err := c.config.String(c.section, option); err == nil {
return stripQuotes(r), true
}
return "", false
}
func (c *MergedConfig) StringDefault(option, dfault string) string {
if r, found := c.String(option); found {
return r
}
return dfault
}
func (c *MergedConfig) HasSection(section string) bool {
return c.config.HasSection(section)
}
// Options returns all configuration option keys.
// If a prefix is provided, then that is applied as a filter.
func (c *MergedConfig) Options(prefix string) []string {
var options []string
keys, _ := c.config.Options(c.section)
for _, key := range keys {
if strings.HasPrefix(key, prefix) {
options = append(options, key)
}
}
return options
}
// Helpers
func stripQuotes(s string) string {
if s == "" {
return s
}
if s[0] == '"' && s[len(s)-1] == '"' {
return s[1 : len(s)-1]
}
return s
}
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