catbase/plugins/nerdepedia/nerdepedia.go

106 lines
2.9 KiB
Go

// © 2019 the CatBase Authors under the WTFPL. See AUTHORS for the list of authors.
package nerdepedia
import (
"fmt"
"strings"
"html"
"net/http"
"bufio"
"github.com/velour/catbase/bot"
"github.com/velour/catbase/bot/msg"
"github.com/velour/catbase/config"
)
const (
descriptionPrefix = "<meta name=\"description\" content=\""
linkPrefix = "<link rel=\"canonical\" href=\""
closingTagSuffix = "\" />"
)
type NerdepediaPlugin struct {
bot bot.Bot
config *config.Config
}
// NewNerdepediaPlugin creates a new NerdepediaPlugin with the Plugin interface
func New(bot bot.Bot) *NerdepediaPlugin {
return &NerdepediaPlugin{
bot: bot,
config: bot.Config(),
}
}
// Message responds to the bot hook on recieving messages.
// This function returns true if the plugin responds in a meaningful way to the users message.
// Otherwise, the function returns false and the bot continues execution of other plugins.
func (p *NerdepediaPlugin) Message(message msg.Message) bool {
lowerCase := strings.ToLower(message.Body)
query := ""
if lowerCase == "may the force be with you" || lowerCase == "help me obi-wan" {
query = "http://starwars.wikia.com/wiki/Special:Random"
} else if lowerCase == "beam me up scotty" || lowerCase == "live long and prosper" {
query = "http://memory-alpha.wikia.com/wiki/Special:Random"
} else if lowerCase == "bless the maker" || lowerCase == "i must not fear" {
query = "http://dune.wikia.com/wiki/Special:Random"
}
if query != "" {
resp, err := http.Get(query)
if err != nil {
return false
}
defer resp.Body.Close()
scanner := bufio.NewScanner(resp.Body)
link := ""
description := ""
for scanner.Scan() {
line := scanner.Text()
if description == "" {
index := strings.Index(line, descriptionPrefix)
if index >= 0 {
description = html.UnescapeString(strings.TrimSuffix(strings.TrimPrefix(line, descriptionPrefix), closingTagSuffix))
}
}
if link == "" {
index := strings.Index(line, linkPrefix)
if index >= 0 {
link = strings.TrimSuffix(strings.TrimPrefix(line, linkPrefix), closingTagSuffix)
}
}
if description != "" && link != "" {
p.bot.SendMessage(message.Channel, fmt.Sprintf("%s (%s)", description, link))
return true
}
}
}
return false
}
// Help responds to help requests. Every plugin must implement a help function.
func (p *NerdepediaPlugin) Help(channel string, parts []string) {
p.bot.SendMessage(channel, "nerd stuff")
}
// Empty event handler because this plugin does not do anything on event recv
func (p *NerdepediaPlugin) Event(kind string, message msg.Message) bool {
return false
}
// Handler for bot's own messages
func (p *NerdepediaPlugin) BotMessage(message msg.Message) bool {
return false
}
// Register any web URLs desired
func (p *NerdepediaPlugin) RegisterWeb() *string {
return nil
}
func (p *NerdepediaPlugin) ReplyMessage(message msg.Message, identifier string) bool { return false }