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package cfg
import (
"os"
"time"
"github.com/wiggin77/cfg/ini"
)
// SrcFile is a configuration `Source` backed by a file containing
// name/value pairs or INI format.
type SrcFile struct {
AbstractSourceMonitor
ini ini.Ini
file *os.File
}
// NewSrcFileFromFilespec creates a new SrcFile with the specified filespec.
func NewSrcFileFromFilespec(filespec string) (*SrcFile, error) {
file, err := os.Open(filespec)
if err != nil {
return nil, err
}
return NewSrcFile(file)
}
// NewSrcFile creates a new SrcFile with the specified os.File.
func NewSrcFile(file *os.File) (*SrcFile, error) {
sf := &SrcFile{}
sf.freq = time.Minute
sf.file = file
if err := sf.ini.LoadFromFile(file); err != nil {
return nil, err
}
return sf, nil
}
// GetProps fetches all the properties from a source and returns
// them as a map.
func (sf *SrcFile) GetProps() (map[string]string, error) {
lm, err := sf.GetLastModified()
if err != nil {
return nil, err
}
// Check if we need to reload.
if sf.ini.GetLastModified() != lm {
if err := sf.ini.LoadFromFile(sf.file); err != nil {
return nil, err
}
}
return sf.ini.ToMap(), nil
}
// GetLastModified returns the time of the latest modification to any
// property value within the source.
func (sf *SrcFile) GetLastModified() (time.Time, error) {
fi, err := sf.file.Stat()
if err != nil {
return time.Now(), err
}
return fi.ModTime(), nil
}
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