Generators updated

Now includes generators for transforming storage.Role into the API
representation and the Typescript version for the frontend

cmd/RolesApiTypeGenerator/main.go

@@ -0,0 +1,136 @@
+/*
+Generator for the API type definition on the go server side
+*/
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	"regexp"
+	"strings"
+	"unicode"
+
+	"gitlab.com/mstarongitlab/goutils/sliceutils"
+)
+
+var findRoleStructRegex = regexp.MustCompile(`type Role struct \{([\s\S]+)\}\n\n/\*`)
+
+var (
+	flagInputFile  = flag.String("input", "", "Specify the input file. If empty, read from stdin")
+	flagOutputFile = flag.String(
+		"output",
+		"",
+		"Specify the output file. If empty, writes to stdout",
+	)
+)
+
+func main() {
+	flag.Parse()
+	var input io.Reader
+	var output io.Writer
+
+	if *flagInputFile == "" {
+		input = os.Stdin
+	} else {
+		file, err := os.Open(*flagInputFile)
+		if err != nil {
+			panic(err)
+		}
+		defer file.Close()
+		input = file
+	}
+	if *flagOutputFile == "" {
+		output = os.Stdout
+	} else {
+		file, err := os.Create(*flagOutputFile)
+		if err != nil {
+			panic(err)
+		}
+		defer file.Close()
+		output = file
+	}
+
+	data, err := io.ReadAll(input)
+	if err != nil {
+		panic(err)
+	}
+	if !findRoleStructRegex.Match(data) {
+		panic("Input doesn't contain role struct")
+	}
+	content := findRoleStructRegex.FindStringSubmatch(string(data))[1]
+	lines := strings.Split(content, "\n")
+	lines = sliceutils.Map(lines, func(t string) string { return strings.TrimSpace(t) })
+	importantLines := sliceutils.Filter(lines, func(t string) bool {
+		if strings.HasPrefix(t, "//") {
+			return false
+		}
+		if strings.Contains(t, "gorm.Model") {
+			return false
+		}
+		data := sliceutils.Filter(strings.Split(t, " "), func(t string) bool { return t != "" })
+		if len(data) < 2 {
+			return false
+		}
+		if !strings.HasPrefix(data[1], "*") && !strings.HasPrefix(data[1], "[]") {
+			return false
+		}
+		return true
+	})
+	nameTypeMap := map[string]string{}
+	for _, line := range importantLines {
+		parts := sliceutils.Filter(strings.Split(line, " "), func(t string) bool { return t != "" })
+		nameTypeMap[parts[0]] = parts[1]
+	}
+
+	outBuilder := strings.Builder{}
+	outBuilder.WriteString(`// Code generated by cmd/RolesApiTypeGenerator DO NOT EDIT.
+// If you need to refresh the content, run go generate again
+`)
+	outBuilder.WriteString("package server\n\n")
+	outBuilder.WriteString("import \"time\"\n")
+
+	outBuilder.WriteString("type linstromRole struct {\n")
+	outBuilder.WriteString("  Id uint `jsonapi:\"primary,roles\"`\n")
+	outBuilder.WriteString(fNT("CreatedAt", "time.Time"))
+	outBuilder.WriteString(fNT("UpdatedAt", "time.Time"))
+	outBuilder.WriteString(fNT("Name", "string"))
+	outBuilder.WriteString(fNT("Priority", "uint32"))
+	outBuilder.WriteString(fNT("IsUserRole", "bool"))
+	outBuilder.WriteString(fNT("IsBuiltIn", "bool"))
+
+	for n, t := range nameTypeMap {
+		outBuilder.WriteString(fNT(n, t))
+	}
+
+	outBuilder.WriteString("}")
+	fmt.Fprint(output, outBuilder.String())
+}
+
+func convertGoNameToJsonApiName(name string) string {
+	buffer := []rune{}
+	isFirst := true
+	for _, char := range name {
+		if unicode.IsUpper(char) {
+			if isFirst {
+				buffer = append(buffer, unicode.ToLower(char))
+				isFirst = false
+			} else {
+				buffer = append(buffer, '-', unicode.ToLower(char))
+			}
+		} else {
+			buffer = append(buffer, char)
+		}
+	}
+	return string(buffer)
+}
+
+func fNT(name, valType string) string {
+	return fmt.Sprintf(
+		"  %s %s `jsonapi:\"attr,%s\"`\n",
+		name,
+		valType,
+		convertGoNameToJsonApiName(name),
+	)
+}