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// Copyright 2009 The "config" Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import "errors"
// AddOption adds a new option and value to the configuration.
//
// If the section is nil then uses the section by default; if it does not exist,
// it is created in advance.
//
// It returns true if the option and value were inserted, and false if the value
// was overwritten.
func (c *Config) AddOption(section string, option string, value string) bool {
c.AddSection(section) // Make sure section exists
if section == "" {
section = DEFAULT_SECTION
}
_, ok := c.data[section][option]
c.data[section][option] = &tValue{c.lastIdOption[section], value}
c.lastIdOption[section]++
return !ok
}
// RemoveOption removes a option and value from the configuration.
// It returns true if the option and value were removed, and false otherwise,
// including if the section did not exist.
func (c *Config) RemoveOption(section string, option string) bool {
if _, ok := c.data[section]; !ok {
return false
}
_, ok := c.data[section][option]
delete(c.data[section], option)
return ok
}
// HasOption checks if the configuration has the given option in the section.
// It returns false if either the option or section do not exist.
func (c *Config) HasOption(section string, option string) bool {
if _, ok := c.data[section]; !ok {
return false
}
_, okd := c.data[DEFAULT_SECTION][option]
_, oknd := c.data[section][option]
return okd || oknd
}
// Options returns the list of options available in the given section.
// It returns an error if the section does not exist and an empty list if the
// section is empty. Options within the default section are also included.
func (c *Config) Options(section string) (options []string, err error) {
if _, ok := c.data[section]; !ok {
return nil, errors.New(SectionError(section).Error())
}
// Keep a map of option names we've seen to deduplicate.
optionMap := make(map[string]struct{},
len(c.data[DEFAULT_SECTION])+len(c.data[section]))
for s, _ := range c.data[DEFAULT_SECTION] {
optionMap[s] = struct{}{}
}
for s, _ := range c.data[section] {
optionMap[s] = struct{}{}
}
// Get the keys.
i := 0
options = make([]string, len(optionMap))
for k, _ := range optionMap {
options[i] = k
i++
}
return options, nil
}
// SectionOptions returns only the list of options available in the given section.
// Unlike Options, SectionOptions doesn't return options in default section.
// It returns an error if the section doesn't exist.
func (c *Config) SectionOptions(section string) (options []string, err error) {
if _, ok := c.data[section]; !ok {
return nil, errors.New(SectionError(section).Error())
}
options = make([]string, len(c.data[section]))
i := 0
for s, _ := range c.data[section] {
options[i] = s
i++
}
return options, nil
}
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