Add site restart chat command (fix #21)

config.go

@@ -2,20 +2,20 @@
 package main
 
 import (
-	"os"
 	"encoding/json"
 	"log"
+	"os"
 )
 
 // Configuration stores information retrieved from a configuration file
 type Configuration struct {
-	port int
+	port      int
 	sites_dir string
-	matrix struct {
+	matrix    struct {
 		homeserver string
-		username string
-		password string
-		room_id string
+		username   string
+		password   string
+		room_id    string
 	}
 }
 
@@ -39,4 +39,3 @@ func parseConfig(path string, config *Configuration) {
 	config.matrix.password = matrix["password"].(string)
 	config.matrix.room_id = matrix["room_id"].(string)
 }
-

config.json

@@ -1,10 +0,0 @@
-{
-	"port": 7575,
-	"sites_dir": "./sites",
-	"matrix": {
-		"homeserver": "https://retroedge.tech",
-		"username": "@lapisdeploy:retroedge.tech",
-		"password": "orange73",
-		"room_id": "!CVyqZMOFBXFdExgnug:retroedge.tech"
-	}
-}

main.go

@@ -58,7 +58,8 @@ func handler(data map[string]interface{}) {
 		}
 		sendMessage(MatrixMessage{text: "⚪️ Starting server..."})
 		if site, exists, err = getSite(repo_name); err != nil {
-			deploy_error := newDeployError(1, "handler", "Failed to get site '%s' after creation!", fmt.Sprint(err))
+			deploy_error := newDeployError(1, "handler",
+				fmt.Sprintf("Failed to get site '%s' after creation!", repo_name), fmt.Sprint(err))
 			deploy_error.SendOverMatrix()
 		}
 		if deploy_error := site.Start(); deploy_error.code != 0 {

matrix.go

@@ -3,15 +3,15 @@ package main
 
 import (
 	"context"
-	"log"
-	"time"
-	"strings"
 	"fmt"
+	"log"
+	"strings"
+	"time"
 
 	"maunium.net/go/mautrix"
 	"maunium.net/go/mautrix/event"
-	"maunium.net/go/mautrix/id"
 	"maunium.net/go/mautrix/format"
+	"maunium.net/go/mautrix/id"
 )
 
 // MatrixMessage stores information about a matrix message.
@@ -19,10 +19,13 @@ type MatrixMessage struct {
 	text string
 }
 
+// MatrixCommandCallback is a function that gets called when the bot is issued a command over Matrix
+type MatrixCommandCallback func(ctx context.Context, evt *event.Event, args []string) string
+
 // MatrixCommand stores information about a matrix chat command
 type MatrixCommand struct {
-	cmd string
-	callback func(ctx context.Context, evt *event.Event) string
+	cmd         string
+	callback    MatrixCommandCallback
 	description string
 }
 
@@ -38,10 +41,10 @@ func sendMessage(msg MatrixMessage) {
 }
 
 // registerChatCommand
-func registerChatCommand(cmd string, description string, callback func(ctx context.Context, evt *event.Event) string) {
+func registerChatCommand(cmd string, description string, callback MatrixCommandCallback) {
 	Chatcommands = append(Chatcommands, MatrixCommand{
-		cmd: cmd,
-		callback: callback,
+		cmd:         cmd,
+		callback:    callback,
 		description: description,
 	})
 }
@@ -53,9 +56,9 @@ func initMatrix() {
 		log.Fatal(err)
 	}
 	resp, err := client.Login(context.Background(), &mautrix.ReqLogin{
-		Type: "m.login.password",
-		Identifier: mautrix.UserIdentifier{Type: mautrix.IdentifierTypeUser, User: configuration.matrix.username},
-		Password: configuration.matrix.password,
+		Type:             "m.login.password",
+		Identifier:       mautrix.UserIdentifier{Type: mautrix.IdentifierTypeUser, User: configuration.matrix.username},
+		Password:         configuration.matrix.password,
 		StoreCredentials: true,
 	})
 	if err != nil {
@@ -81,14 +84,16 @@ func initMatrix() {
 	})
 	syncer.OnEventType(event.EventMessage, func(ctx context.Context, evt *event.Event) {
 		if evt.RoomID.String() == configuration.matrix.room_id {
-			prefixes := []string{"!", configuration.matrix.username+" "}
-			for _,prefix := range prefixes {
+			prefixes := []string{"!", configuration.matrix.username + " "}
+			for _, prefix := range prefixes {
 				if strings.HasPrefix(evt.Content.AsMessage().Body, prefix) {
+					msg := evt.Content.AsMessage().Body
+					cmd := strings.TrimPrefix(strings.Split(msg, " ")[0], prefix)
 					found_command := false
 					for _, command := range Chatcommands {
-						if command.cmd == strings.TrimPrefix(evt.Content.AsMessage().Body, prefix) {
+						if command.cmd == cmd {
 							found_command = true
-							out := command.callback(ctx, evt)
+							out := command.callback(ctx, evt, strings.Split(strings.TrimPrefix(msg, prefix+cmd), " "))
 							content := format.RenderMarkdown(out, true, false)
 							content.SetReply(evt)
 							client.SendMessageEvent(ctx, evt.RoomID, event.EventMessage, content)
@@ -103,30 +108,49 @@ func initMatrix() {
 		}
 	})
 
-	registerChatCommand("help", "Show the help dialouge", func(ctx context.Context, evt *event.Event) string {
+	registerChatCommand("help", "Show the help dialouge", func(ctx context.Context, evt *event.Event, args []string) string {
 		text := ""
-		for _,cmd := range Chatcommands {
+		for _, cmd := range Chatcommands {
 			text = fmt.Sprintf("%s- %s\n	%s\n", text, cmd.cmd, cmd.description)
 		}
 		return text
 	})
 
-	registerChatCommand("sites", "Display all available sites", func(ctx context.Context, evt *event.Event) string {
+	registerChatCommand("sites", "Display all available sites", func(ctx context.Context, evt *event.Event, args []string) string {
 		text := "⚪️ Getting sites...\n"
 		sites, err := getAllSites()
 		if err.code != 0 {
-			return text+"🔴 Failed to get sites!"
+			return text + "🔴 Failed to get sites!"
 		}
 		for _, site := range sites {
 			text = fmt.Sprintf("%s- %s\n", text, site.name)
 		}
 		if len(sites) == 0 {
-			text = text+"*No sites found*"
+			text = text + "*No sites found*"
 		}
 		return text
 	})
 
-	go func () {
+	registerChatCommand("restart", "Restart a site.", func(ctx context.Context, evt *event.Event, args []string) string {
+		if len(args) < 2 {
+			return "🔴 Invalid site."
+		}
+		site, found, err := getSite(args[1])
+		if err != nil {
+			return "🔴 Failed to get site " + args[2] + "!"
+		} else if !found {
+			return "🔴 Invalid site."
+		}
+		text := "⚪️ Restarting server..."
+		derr := site.Restart()
+		if derr.code != 0 {
+			derr.SendOverMatrix()
+			return text + "\n🔴 Failed to restart site!"
+		}
+		return text + "\n🟢 Successfully restarted site."
+	})
+
+	go func() {
 		for range time.Tick(time.Second * 6) {
 			log.Printf("Scanning for queued messages...")
 			for _, msg := range MatrixOut {

site.go

@@ -2,6 +2,7 @@
 package main
 
 import (
+	"encoding/json"
 	"errors"
 	"fmt"
 	"log"
@@ -15,23 +16,64 @@ import (
 
 // Site contains information and methods used for management of a Lapis site.
 type Site struct {
+	name   string
+	config SiteConfig
+}
+
+// SiteConfig contains parsed data from a site's configuration file
+type SiteConfig struct {
+	port int64
 	name string
 }
 
 // getSite gets a specific site and returns a Site struct and a bool indicating whether a site was found.
 func getSite(name string) (Site, bool, error) {
-	site_path := configuration.sites_dir+"/"+name
-	exists, err := fileExists(site_path);
+	site_path := configuration.sites_dir + "/" + name
+	exists, err := fileExists(site_path)
 	if err != nil {
 		return Site{}, false, errors.New(fmt.Sprintf("Failed to get site '%s'", name))
 	}
 	if exists {
-		return Site{name: name}, true, nil
+		site := Site{name: name}
+		site.getConfig() // Get per-site config
+		return site, true, nil
 	} else {
 		return Site{}, false, nil
 	}
 }
 
+// getConfig parses a site's configuration file
+func (site *Site) getConfig() (bool, error) {
+	path := fmt.Sprintf("%s/%s/deploy_config.json", configuration.sites_dir, site.name)
+	if exists, _ := fileExists(path); !exists {
+		return false, nil
+	}
+	file, _ := os.Open(path)
+	var data map[string]interface{}
+	err := json.NewDecoder(file).Decode(&data)
+	if err != nil {
+		log.Panic("Failed to parse config:", err)
+	}
+	file.Close()
+	// Parse the config
+	var config SiteConfig
+	config.name = data["name"].(string)
+	config.port = int64(data["port"].(float64))
+
+	site.config = config
+
+	return true, nil
+}
+
+// getName gets a website's configured name (falls back to technical name if one isn't configured)
+func (site *Site) getName() string {
+	if site.config.name == "" {
+		return site.name
+	} else {
+		return site.config.name
+	}
+}
+
 // getAllSites gets every site installed.
 func getAllSites() ([]Site, DeployError) {
 	sites_dir := configuration.sites_dir
@@ -71,16 +113,16 @@ func startAllSites() DeployError {
 
 // Start attempts to start a Lapis server in the given repository.
 func (site *Site) Start() DeployError {
-	log.Printf("Starting Lapis server in repository %s...", site.name)
+	log.Printf("Starting Lapis server in %s...", site.getName())
 
 	old_cwd, _ := os.Getwd()
 	defer syscall.Chdir(old_cwd)
-	syscall.Chdir(configuration.sites_dir+"/"+site.name)
+	syscall.Chdir(configuration.sites_dir + "/" + site.name)
 
 	cmd := exec.Command("lapis", "serve")
 	if err := cmd.Start(); err != nil {
 		return newDeployError(1, "startSite",
-			fmt.Sprintf("Failed to start Lapis server in repository '%s'", site.name), "")
+			fmt.Sprintf("Failed to start Lapis server in '%s'", site.getName()), "")
 	}
 	go func() {
 		cmd.Wait()
@@ -91,36 +133,36 @@ func (site *Site) Start() DeployError {
 
 // Restart attempts to restart the Lapis server in the given repository.
 func (site *Site) Restart() DeployError {
-	log.Printf("Restarting Lapis server on repository %s...", site.name)
+	log.Printf("Restarting Lapis server in %s...", site.getName())
 
 	old_cwd, _ := os.Getwd()
 	defer syscall.Chdir(old_cwd)
-	syscall.Chdir(configuration.sites_dir+"/"+site.name)
+	syscall.Chdir(configuration.sites_dir + "/" + site.name)
 
 	out, err := exec.Command("lapis", "build").CombinedOutput()
 	if err != nil {
 		return newDeployError(1, "restartSite",
-			fmt.Sprintf("Failed to run 'lapis build' in repository '%s'", site.name), string(out))
+			fmt.Sprintf("Failed to run 'lapis build' in '%s'", site.getName()), string(out))
 	}
 	log.Printf("[lapis build] %s", out)
 	if !strings.Contains(string(out), "HUP") {
 		return newDeployError(1, "restartSite",
-			"'lapis build' command returned unexpected value! (Lapis server not running?)", string(out))
+			"Failed to restart Lapis server! (Lapis not running?)", string(out))
 	}
 	return DeployError{}
 }
 
 // Update attempts to pull or clone a repository using the given name and url
-func (site *Site) Update() DeployError  {	
-	log.Printf("Pulling down repository %s...", site.name)
-	repo,err := git.Open(configuration.sites_dir+"/"+site.name)
+func (site *Site) Update() DeployError {
+	log.Printf("Pulling down repository %s...", site.getName())
+	repo, err := git.Open(configuration.sites_dir + "/" + site.name)
 	if err != nil {
 		return newDeployError(1, "updateSite",
 			fmt.Sprintf("Failed to open git repository '%s'", site.name), fmt.Sprint(err))
 	}
 	if err = repo.Pull(); err != nil {
 		return newDeployError(1, "updateSite",
-			fmt.Sprintf("Failed to pull down git repository '%s'", site.name), fmt.Sprint(err))
+			fmt.Sprintf("Failed to pull down git repository '%s'", site.getName()), fmt.Sprint(err))
 	}
 	return DeployError{}
 }