// © 2013 the CatBase Authors under the WTFPL. See AUTHORS for the list of authors.
package bot
import (
"html/template"
"net/http"
"reflect"
"strings"
"github.com/jmoiron/sqlx"
"github.com/rs/zerolog/log"
"github.com/velour/catbase/bot/msg"
"github.com/velour/catbase/bot/msglog"
"github.com/velour/catbase/bot/user"
"github.com/velour/catbase/config"
)
// bot type provides storage for bot-wide information, configs, and database connections
type bot struct {
// Each plugin must be registered in our plugins handler. To come: a map so that this
// will allow plugins to respond to specific kinds of events
plugins map[string]Plugin
pluginOrdering []string
// Users holds information about all of our friends
users []user.User
// Represents the bot
me user.User
config *config.Config
conn Connector
logIn chan msg.Message
logOut chan msg.Messages
version string
// The entries to the bot's HTTP interface
httpEndPoints map[string]string
// filters registered by plugins
filters map[string]func(string) string
callbacks CallbackMap
}
// Variable represents a $var replacement
type Variable struct {
Variable, Value string
}
// New creates a bot for a given connection and set of handlers.
func New(config *config.Config, connector Connector) Bot {
logIn := make(chan msg.Message)
logOut := make(chan msg.Messages)
msglog.RunNew(logIn, logOut)
users := []user.User{
user.User{
Name: config.Get("Nick", "bot"),
},
}
bot := &bot{
config: config,
plugins: make(map[string]Plugin),
pluginOrdering: make([]string, 0),
conn: connector,
users: users,
me: users[0],
logIn: logIn,
logOut: logOut,
httpEndPoints: make(map[string]string),
filters: make(map[string]func(string) string),
callbacks: make(CallbackMap),
}
bot.migrateDB()
http.HandleFunc("/", bot.serveRoot)
connector.RegisterEvent(bot.Receive)
return bot
}
// Config gets the configuration that the bot is using
func (b *bot) Config() *config.Config {
return b.config
}
func (b *bot) DB() *sqlx.DB {
return b.config.DB
}
// Create any tables if necessary based on version of DB
// Plugins should create their own tables, these are only for official bot stuff
// Note: This does not return an error. Database issues are all fatal at this stage.
func (b *bot) migrateDB() {
if _, err := b.DB().Exec(`create table if not exists variables (
id integer primary key,
name string,
value string
);`); err != nil {
log.Fatal().Err(err).Msgf("Initial DB migration create variables table")
}
}
// Adds a constructed handler to the bots handlers list
func (b *bot) AddPlugin(h Plugin) {
name := reflect.TypeOf(h).String()
b.plugins[name] = h
b.pluginOrdering = append(b.pluginOrdering, name)
}
func (b *bot) Who(channel string) []user.User {
names := b.conn.Who(channel)
users := []user.User{}
for _, n := range names {
users = append(users, user.New(n))
}
return users
}
var rootIndex = `
Factoids
{{if .EndPoints}}
| Plugin |
{{range $key, $value := .EndPoints}}
| {{$key}} |
{{end}}
{{end}}
`
func (b *bot) serveRoot(w http.ResponseWriter, r *http.Request) {
context := make(map[string]interface{})
context["EndPoints"] = b.httpEndPoints
t, err := template.New("rootIndex").Parse(rootIndex)
if err != nil {
log.Error().Err(err)
}
t.Execute(w, context)
}
// IsCmd checks if message is a command and returns its curtailed version
func IsCmd(c *config.Config, message string) (bool, string) {
cmdcs := c.GetArray("CommandChar", []string{"!"})
botnick := strings.ToLower(c.Get("Nick", "bot"))
if botnick == "" {
log.Fatal().
Msgf(`You must run catbase -set nick -val `)
}
iscmd := false
lowerMessage := strings.ToLower(message)
if strings.HasPrefix(lowerMessage, botnick) &&
len(lowerMessage) > len(botnick) &&
(lowerMessage[len(botnick)] == ',' || lowerMessage[len(botnick)] == ':') {
iscmd = true
message = message[len(botnick):]
// trim off the customary addressing punctuation
if message[0] == ':' || message[0] == ',' {
message = message[1:]
}
} else {
for _, cmdc := range cmdcs {
if strings.HasPrefix(lowerMessage, cmdc) && len(cmdc) > 0 {
iscmd = true
message = message[len(cmdc):]
break
}
}
}
// trim off any whitespace left on the message
message = strings.TrimSpace(message)
return iscmd, message
}
func (b *bot) CheckAdmin(nick string) bool {
for _, u := range b.Config().GetArray("Admins", []string{}) {
if nick == u {
return true
}
}
return false
}
var users = map[string]*user.User{}
func (b *bot) GetUser(nick string) *user.User {
if _, ok := users[nick]; !ok {
users[nick] = &user.User{
Name: nick,
Admin: b.checkAdmin(nick),
}
}
return users[nick]
}
func (b *bot) NewUser(nick string) *user.User {
return &user.User{
Name: nick,
Admin: b.checkAdmin(nick),
}
}
func (b *bot) checkAdmin(nick string) bool {
for _, u := range b.Config().GetArray("Admins", []string{}) {
if nick == u {
return true
}
}
return false
}
// Register a text filter which every outgoing message is passed through
func (b *bot) RegisterFilter(name string, f func(string) string) {
b.filters[name] = f
}
// Register a callback
func (b *bot) Register(p Plugin, kind Kind, cb Callback) {
t := reflect.TypeOf(p).String()
if _, ok := b.callbacks[t]; !ok {
b.callbacks[t] = make(map[Kind][]Callback)
}
if _, ok := b.callbacks[t][kind]; !ok {
b.callbacks[t][kind] = []Callback{}
}
b.callbacks[t][kind] = append(b.callbacks[t][kind], cb)
}
func (b *bot) RegisterWeb(root, name string) {
b.httpEndPoints[name] = root
}