commit 8b6f5d360cc69e95b9cd6464e30d89194e09af69
Author: Victor Truong <victor@victortruong.com>
Date:   Tue Jun 30 02:23:49 2020 -0700

    Create savepoint

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4c49bd7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.env
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..fdc2161
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Victor Truong
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..cfa413e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# 🦉 Jia
+
+## License
+
+[MIT License](LICENSE.txt)
diff --git a/cmd/jia.go b/cmd/jia.go
new file mode 100644
index 0000000..222514a
--- /dev/null
+++ b/cmd/jia.go
@@ -0,0 +1,78 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"regexp"
+	"strconv"
+
+	"github.com/ifvictr/jia/pkg/jia"
+	"github.com/joho/godotenv"
+	"github.com/slack-go/slack"
+)
+
+func init() {
+	godotenv.Load()
+}
+
+func main() {
+	fmt.Println("Starting Jia…")
+	config := jia.NewConfig()
+
+	api := slack.New(config.BotToken)
+	rtm := api.NewRTM()
+
+	lastValidNumber := 0
+	var lastSender string
+
+	go rtm.ManageConnection()
+
+	for event := range rtm.IncomingEvents {
+		switch ev := event.Data.(type) {
+		case *slack.MessageEvent:
+			// Ignore messages that aren't in the target channel, or are non-user messages
+			if ev.Channel != config.ChannelId || ev.User == "USLACKBOT" || ev.User == "" {
+				continue
+			}
+
+			// Attempt to extract a positive number from the beginning of a string
+			countPattern := regexp.MustCompile(`^\d+`)
+			matchedNumber, err := strconv.Atoi(countPattern.FindString(ev.Text))
+			log.Println(matchedNumber)
+
+			// Ignore messages that don't have numbers
+			if err != nil {
+				log.Println("Failed to retrieve number, skipping…")
+				continue
+			}
+
+			// Reject if sender also sent the previous message
+			if ev.User == lastSender {
+				api.AddReaction("bangbang", slack.ItemRef{
+					Channel:   ev.Channel,
+					Timestamp: ev.Timestamp,
+				})
+				api.PostEphemeral(ev.Channel, ev.User, slack.MsgOptionText("You counted consecutively! That’s not allowed.", false))
+				continue
+			}
+
+			// Ignore numbers that aren't in order
+			if matchedNumber != lastValidNumber+1 {
+				api.AddReaction("bangbang", slack.ItemRef{
+					Channel:   ev.Channel,
+					Timestamp: ev.Timestamp,
+				})
+				api.PostEphemeral(ev.Channel, ev.User, slack.MsgOptionText("You counted incorrectly! The next valid number is "+strconv.Itoa(lastValidNumber+1), false))
+				continue
+			}
+
+			// Finally!
+			lastValidNumber = matchedNumber
+			lastSender = ev.User
+			api.AddReaction("+1", slack.ItemRef{
+				Channel:   ev.Channel,
+				Timestamp: ev.Timestamp,
+			})
+		}
+	}
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..a987b4c
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,10 @@
+module github.com/ifvictr/jia
+
+go 1.14
+
+require (
+	github.com/gorilla/websocket v1.4.2 // indirect
+	github.com/joho/godotenv v1.3.0
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/slack-go/slack v0.6.5
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..4ea4c9f
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,18 @@
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-test/deep v1.0.4/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
+github.com/gorilla/websocket v1.2.0 h1:VJtLvh6VQym50czpZzx07z/kw9EgAxI3x1ZB8taTMQQ=
+github.com/gorilla/websocket v1.2.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
+github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=
+github.com/joho/godotenv v1.3.0/go.mod h1:7hK45KPybAkOC6peb+G5yklZfMxEjkZhHbwpqxOKXbg=
+github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
+github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/slack-go/slack v0.6.4 h1:cxOqFgM5RW6mdEyDqAJutFk3qiORK9oHRKi5bPqkY9o=
+github.com/slack-go/slack v0.6.4/go.mod h1:sGRjv3w+ERAUMMMbldHObQPBcNSyVB7KLKYfnwUFBfw=
+github.com/slack-go/slack v0.6.5 h1:IkDKtJ2IROJNoe3d6mW870/NRKvq2fhLB/Q5XmzWk00=
+github.com/slack-go/slack v0.6.5/go.mod h1:FGqNzJBmxIsZURAxh2a8D21AnOVvvXZvGligs4npPUM=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
diff --git a/pkg/jia/config.go b/pkg/jia/config.go
new file mode 100644
index 0000000..beb5c88
--- /dev/null
+++ b/pkg/jia/config.go
@@ -0,0 +1,26 @@
+package jia
+
+import (
+	"os"
+)
+
+type Config struct {
+	BotToken  string
+	ChannelId string
+}
+
+func NewConfig() *Config {
+	return &Config{
+		BotToken:  getEnv("SLACK_CLIENT_BOT_TOKEN", ""),
+		ChannelId: getEnv("SLACK_CHANNEL_ID", ""),
+	}
+}
+
+func getEnv(key string, defaultValue string) string {
+	value, exists := os.LookupEnv(key)
+	if exists {
+		return value
+	}
+
+	return defaultValue
+}