SSE in working state

backend/backend.go

@@ -7,8 +7,8 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"strings"
 	"time"
-
 	"git.noctra.dev/noctra/servtex/globals"
 )
 
@@ -32,8 +32,16 @@ func GetLocalTimePretty() string {
 	return GetLocalTime().Format("02.01.2006 15:04")
 }
 
-// Writes to log and prints to screen
-func LogLine(message string) {
+// Writes to log file and prints to screen
+//
+// Levels:
+//	1 - Debug
+//	2 - Info
+//	3 - Warning
+//	4 - Error
+func LogLine(message string, level int) {
+	if level < globals.AppConfig.LogLevelNumeric { return }
+
 	logline := GetLocalTimeLog() + " ServTeX: " + message + "\n"
 	fmt.Print(logline)
 	globals.LogFile.WriteString(logline)
@@ -46,15 +54,31 @@ func configReaderParse(filePath string, configOptionStorage *globals.Config) err
 	jsonData, err := os.ReadFile(filePath)
 	if err == nil {
 		if err = json.Unmarshal(jsonData, &configOptionStorage); err != nil {
+			LogLine("Configuration file is invaldi JSON", 5)
 			return errors.New("Config file could not be read")
 		}
 	} else {
+		LogLine(fmt.Sprintf("Config at %s does not exist", filePath), 1)
 		return errors.New("Config file does not exist")
 	}
 
+	switch strings.ToLower(configOptionStorage.LogLevel) {
+		case "debug":
+			configOptionStorage.LogLevelNumeric = 1
+		case "info":
+			configOptionStorage.LogLevelNumeric = 2
+		case "warning":
+			configOptionStorage.LogLevelNumeric = 3
+		case "error":
+			configOptionStorage.LogLevelNumeric = 4
+		default:
+			configOptionStorage.LogLevelNumeric = 3
+			LogLine("Defaulting to log level warning", 3)
+	}
 	return configValidator(*configOptionStorage)
 }
 
+// tbd what exactly happens here
 func configValidator(config globals.Config) error {
 	return nil
 }
@@ -91,7 +115,7 @@ func ConfigReader(configFileName string, configOptionStorage *globals.Config) er
 //
 // Optionally, a minimum time to wait for consecutive changes can be specified
 func ChangeWatch(path string, callOnChange func()) {
-	LogLine("File change noticed")
+	LogLine("File change noticed", 2)
 }
 
 // Intended to be run as goroutine
@@ -99,11 +123,11 @@ func LatexCompile(config globals.Config, execution *globals.LatexExecution) erro
 	if execution.ExecutionLock.TryLock() {
 		defer execution.ExecutionLock.Unlock()
 	} else {
-		LogLine("LaTeX execution already underway")
+		LogLine("LaTeX execution already underway", 2)
 		return errors.New("Execution already in progress")
 	}
 
-	LogLine("LaTeX execution started")
+	LogLine("LaTeX execution started", 2)
 	execution.ExecutionState = "Started"
 
 	var latexCommand *exec.Cmd
@@ -115,11 +139,13 @@ func LatexCompile(config globals.Config, execution *globals.LatexExecution) erro
 				"-jobname=servtex", 
 				config.LatexSourceFilePath,
 			)
+			LogLine(fmt.Sprintf("Command: %s", latexCommand.String()), 1)
 		default:
 			execution.ExecutionState = "Unknown Latex Engine"
 			execution.Output = []byte{}
 			execution.Timestamp = GetLocalTimePretty()
-			return errors.New("Unknown Latex Engine")
+			LogLine("Unsupported LaTeX Engine", 4)
+			return errors.New("Unsupported LaTeX Engine")
 	}
 
 	execution.ExecutionState = "Running"
@@ -132,6 +158,7 @@ func LatexCompile(config globals.Config, execution *globals.LatexExecution) erro
 	execution.Output = stdout
 	execution.Timestamp = GetLocalTimePretty()
 	execution.ExecutionState = "Done"
+	LogLine("LaTeX execution finished", 2)
 	return nil
 }