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tell.go
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tell.go
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package tell
import (
"encoding/json"
"fmt"
"github.com/lovelaced/glitzz/config"
"github.com/lovelaced/glitzz/core"
"github.com/lovelaced/glitzz/logging"
"github.com/thoj/go-ircevent"
"io/ioutil"
"os"
"strings"
"sync"
"time"
)
type savedMessage struct {
Author string
Target string
Message string
Time time.Time
}
type messageStore interface {
SaveMessage(msg savedMessage) error
GetMessagesForNick(target string) ([]savedMessage, error)
}
func newFileMessageStore(filepath string, log logging.Logger) (messageStore, error) {
rv := &fileMessageStore{
filepath: filepath,
messages: make(map[string][]savedMessage),
log: log,
}
if err := rv.readMessages(); err != nil {
return nil, err
}
return rv, nil
}
type fileMessageStore struct {
filepath string
messages map[string][]savedMessage
messagesMutex sync.Mutex
log logging.Logger
}
func (fms *fileMessageStore) readMessages() error {
content, err := ioutil.ReadFile(fms.filepath)
if os.IsNotExist(err) {
fms.log.Warn("File containing saved messages does not exist! Is this the first run?", "error", err)
return nil
}
if err != nil {
return err
}
err = json.Unmarshal(content, &fms.messages)
if err != nil {
return err
}
return nil
}
func (fms *fileMessageStore) saveMessages() error {
data, err := json.Marshal(fms.messages)
if err != nil {
return err
}
err = ioutil.WriteFile(fms.filepath, data, 0600)
if err != nil {
return err
}
return nil
}
func (fms *fileMessageStore) SaveMessage(msg savedMessage) error {
fms.messagesMutex.Lock()
defer fms.messagesMutex.Unlock()
msg.Target = strings.ToLower(msg.Target)
messages, ok := fms.messages[msg.Target]
if !ok {
messages = make([]savedMessage, 0)
}
messages = append(messages, msg)
fms.messages[msg.Target] = messages
err := fms.saveMessages()
if err != nil {
return err
}
return nil
}
func (fms *fileMessageStore) GetMessagesForNick(target string) ([]savedMessage, error) {
fms.messagesMutex.Lock()
defer fms.messagesMutex.Unlock()
target = strings.ToLower(target)
messages, ok := fms.messages[target]
if ok {
delete(fms.messages, target)
err := fms.saveMessages()
if err != nil {
fms.log.Error("could not save messages", "error", err)
}
return messages, nil
}
return nil, nil
}
func New(sender core.Sender, conf config.Config) (core.Module, error) {
base := core.NewBase("tell", sender, conf)
ms, err := newFileMessageStore(conf.Tell.TellFile, base.Log)
if err != nil {
return nil, err
}
rv := &tell{
Base: base,
ms: ms,
}
rv.AddCommand("tell", rv.tell)
return rv, nil
}
type tell struct {
core.Base
ms messageStore
}
func (t *tell) tell(arguments core.CommandArguments) ([]string, error) {
if len(arguments.Arguments) >= 2 {
msg := savedMessage{
Author: arguments.Nick,
Target: arguments.Arguments[0],
Message: strings.Join(arguments.Arguments[1:], " "),
Time: time.Now().UTC(),
}
err := t.ms.SaveMessage(msg)
if err != nil {
t.Log.Error("could not save message",
"msg", msg, "err", err)
} else {
return []string{"Will do!"}, nil
}
}
return nil, nil
}
func (t *tell) HandleEvent(event *irc.Event) {
if event.Code == "PRIVMSG" {
messages, err := t.ms.GetMessagesForNick(event.Nick)
if err != nil {
t.Log.Error("could not retrieve saved messages",
"nick", event.Nick, "err", err)
} else {
for _, msg := range messages {
t.Sender.Reply(event, formatMessage(msg))
}
}
}
}
func formatMessage(msg savedMessage) string {
time := msg.Time.Format("15:04")
return fmt.Sprintf("%s: %s <%s> %s", msg.Target, time, msg.Author, msg.Message)
}