Started REPL env for custom interactive shell

ONLY active when bot is running
- Arguments [--watch] displays how many usses of each trigger and how
many uses over the lifetime ofthe bot
Commands
- title [get/set] <newTitle>
- category [get/set] <newCategory> - MUST be a legit Twitch.tv one
- yet to come [cmd add|del|edit] [trigger] [response] (NOTE if you want
Emotes you will have to type the 'name' in for twitch chat to recognise
it)

internal/chat/handler.go

@@ -97,7 +97,13 @@ func HandleMessage(client *twitch.Client, apiClient interface{}, message twitch.
 	// check perms
 	for _, cmd := range commands.GetAllCommands() {
 		if messageMatchesCommand(msg, botName, cmd) {
+			// track usage: use first alias as key
+			triggerKey := strings.ToLower(cmd.Triggers[0])
+			commands.IncrementUsage(triggerKey)
+			
 			if userHasPermission(user, cmd.Permission) {
+				reply := ReplacePlaceholders(cmd.Replay, user.DisplayName, channel, botUsername)
+				
 				client.Say(channel, cmd.Reply)
 			} else {
 				client.Say(channel, fmt.Sprintf("@%s You don't have permission to use this command.", user.DisplayName))

internal/commands/usage.go

@@ -0,0 +1,75 @@
+package commands
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"sync"
+)
+
+const usageFile = "internal/storage/usage.json"
+
+var (
+	usageMu sybc.Mutex
+	usageCounts map[string]int
+)
+
+func LoadUsage() error {
+	usageMu.Lock()
+	defer usageMu.Unlock()
+
+	data, err := ioutil.ReadFile(usageFile)
+	if os.IsNotExist(err) {
+		usageCounts = make(map[string]int)
+		return nil
+	}
+	if err != nil {
+		return nil
+	}
+	return json.Unmarshal(dat, &usageCounts)
+}
+
+func SaveUsage() error {
+	usageMu.Lock()
+	defer usageMu.Unlock()
+
+	if err := os.MkdirAll(filepath.Dir(usageFile), 0755); err != nil {
+		return err
+	}
+	data, err := json.MarshalIndent(usageCounts, "", "  ")
+	if err != nil {
+	return err
+	}
+	return ioutil.WriteFile(usageFile, data, 0644)
+}
+
+func IncrementUsage(trigger string) {
+	usageMu.Lock()
+	defer usageMu.Unlock()
+	if usageCounts == nil {
+		usageCounts = make(map[string]int)
+	}
+	usageCounts[trigger]++
+	SaveUsage()
+}
+
+func AllUsage() map[string]int {
+	usageMu.Lock()
+	defer usageMu.Unlock()
+	m := make(map[string]int, len(usageCounts))
+	for k, v := range usageCounts {
+		m[k] = v
+	}
+	return m
+}
+
+func TotalUsage() int {
+	usageMu.Lock()
+	defer usageMu.Unlock()
+	sum := 0
+	for _, v := range usageCounts {
+		sum += v
+	}
+	return sum
+}

internal/config/config.go

@@ -0,0 +1,84 @@
+package config
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+)
+
+const (
+	ConfigDir = "internal/storage"
+	ConfigFile = "settings.json"
+)
+
+type Settings struct {
+	TitleGetTemplate string `json:"title_get_template"`
+	TitleSetTemplate string `json:"title_set_template"`
+	CategoryGetTemplate string `json:"category_get_template"`
+	CategorySetTemplate string `json:"category_set_template"`
+}
+
+var cfg Settings
+
+func Load() error {
+	path := filepath.Join(ConfigDir, ConfigFile)
+	data, err := ioutil.ReadFile(path)
+	if os.IsNotExist(err) {
+		// defaults
+		cfg = Settings{
+			TitleGetTemplate: "@user Current Title: $title",
+			TitleSetTemplate: "New Stream Title: $title",
+			CategoryGetTepmplate: "@user Current Category: $category",
+			CategorySetTemplate: "New StreamCategory: $category",
+		}
+		return Save()
+	}
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(data, &cgf)
+}
+
+func Save() error {
+	if err := os.MkdirAll(ConfigDir, 0755); err != nil {
+		return err
+	}
+	path := filepath.Join(ConfigDir, ConfigFile)
+	data, err := json.MarshalIndent(cfg, "", "  ")
+	if err != nil {
+		return err
+	}
+	return ioutil.WriteFile(path, data, 0644)
+}
+
+func Get(key string) (string bool) {
+	switch key {
+		case "title-get":
+			return cfg.TitleGetTemplate, true
+		case "title-set":
+			return cfg.TitleSetTemplate, true
+		case "category-get":
+			return cfg.CategoryGetTemplate, true
+		caes "categroy-set":
+			return cfg.CategorySetTemplate, true
+	}
+	return "", false
+}
+
+func Set(key, val string) bool {
+	switch key {
+		case "title-get":
+			cfg.TitleGetTemplate = val
+		case "tiel-set":
+			cfg.TitleSetTemplate = val
+		case "category-get":
+			cfg.CategoryGetTemplate = val
+		case "category-set":
+			cfg.CategorySetTemplate = val
+		default:
+			return false
+	}
+	Save()
+	return true
+}

internal/twitchapi/client.go

@@ -118,25 +118,25 @@ func (c *Client) GetStreamCategory(channel string) (string, error) {
 	return resp.Data.Channels[0].GameName, nil
 }
 
-func setStreamCategory(client *helix.Client, channel, newCategory string) error {
-	userID, err := GetUserID(client, channel)
+func (c *Client) SetStreamCategory(channel, newCategory string) error {
+	userID, err := c.GetUserID(channel)
 	if err != nil {
 		return err
 	}
 	// get Twitch GameID by Name from API
-	gameID, err := getGameIDByName(client, newCategory)
+	gameID, err := c.GetGameIDByName(newCategory)
 	if err != nil {
 		return err
 	}
-	_, err = client.EditChannelInformation(&helix.EditChannelInformationParams{
+	_, err = c.api.EditChannelInformation(&helix.EditChannelInformationParams{
 		BroadcasterID: userID,
 		GameID: gameID,
 	})
 	return err
 }
 
-func getGameIDByName(client *helix.Client, name string) (string, error) {
-	resp, err := GetGames(&helix.GamesParams{
+func (c *Client) GetGameIDByName(name string) (string, error) {
+	resp, err := c.api.GetGames(&helix.GamesParams{
 		Names: []string{name},
 	})
 	if err != nil {