+thanks plugin

README.md

@@ -12,6 +12,7 @@
 |LoveYou|`(?i)i love you`|Spreading love where ever we can by responding when someone shows us love.|
 |OpenBSDMan|`(?i)^man: ([1-9]?p?)\s?(\w+)$`|Produces a link to man.openbsd.org.|
 |Source|`(?i)where is your (source|code)`|Tell people where they can find more information about myself.|
+|Thanks|`(?i)^thank you|thank you$|^thanks|thanks$|^ty|ty$`|Bots should be respectful. Respond to thanks.|
 |Version|`(?i)version$`|Show a bit of information about what we are.|
 |Wb|`(?i)^welcome back|welcome back$|^wb|wb$`|Respond to welcome back messages.|
 |Weather|`(?i)^weather: (\d+)$`|Produce weather information for a given ZIP code. Data comes from openweathermap.org.|

plugins/plugins.go

@@ -78,6 +78,7 @@ var Plugs = Plugins{
 	&LoveYou{},
 	&OpenBSDMan{},
 	&Source{},
+	&Thanks{},
 	&Version{},
 	&Wb{},
 	&Weather{},

plugins/thanks.go

@@ -0,0 +1,56 @@
+package plugins
+
+import (
+	"fmt"
+	"log"
+	"math/rand"
+	"regexp"
+	"time"
+
+	"github.com/matrix-org/gomatrix"
+)
+
+// Thanks responds to thanks
+type Thanks struct {
+}
+
+// Descr describes this plugin
+func (h *Thanks) Descr() string {
+	return "Bots should be respectful. Respond to thanks."
+}
+
+// Re checks for various forms of thanks
+func (h *Thanks) Re() string {
+	return `(?i)^thank you|thank you$|^thanks|thanks$|^ty|ty$`
+}
+
+// Match determins if we are being thanked
+func (h *Thanks) Match(user, msg string) bool {
+	re := regexp.MustCompile(h.Re())
+	return re.MatchString(msg) && ToMe(user, msg)
+}
+
+// SetStore we don't need a store here
+func (h *Thanks) SetStore(s PluginStore) {}
+
+// RespondText to welcome back events
+func (h *Thanks) RespondText(c *gomatrix.Client, ev *gomatrix.Event, user, post string) {
+	s := NameRE.ReplaceAllString(ev.Sender, "$1")
+	a := []string{
+		fmt.Sprintf("welcome %s", s),
+		"welcome",
+		"you're welcome",
+		"np!",
+		fmt.Sprintf("you'r welcome, %s", s),
+	}
+
+	rand.Seed(time.Now().Unix())
+
+	log.Printf("%s: responding to '%s'", h.Name(), ev.Sender)
+	SendText(c, ev.RoomID, a[rand.Intn(len(a))])
+}
+
+// Name Thanks
+func (h *Thanks) Name() string {
+	return "Thanks"
+}