gong_marshall.go

// generated code - do not edit
package x

import (
	"fmt"
	"log"
	"os"
	"path/filepath"
	"regexp"
	"sort"
	"strings"
)

const marshallRes = `package {{PackageName}}

import (
	"time"

	"{{ModelsPackageName}}"

	// injection point for ident package import declaration{{ImportPackageDeclaration}}
)

// generated in order to avoid error in the package import
// if there are no elements in the stage to marshall
var ___dummy__Stage_{{databaseName}} models.StageStruct
var ___dummy__Time_{{databaseName}} time.Time

// Injection point for meta package dummy declaration{{ImportPackageDummyDeclaration}}

// currently, DocLink renaming is not enabled in gopls
// the following map are devised to overcome this limitation
// those maps and the processing code will be eleminated when
// DocLink renaming will be enabled in gopls
// [Corresponding Issue](https://github.com/golang/go/issues/57559)
//
// When parsed, those maps will help with the renaming process
var map_DocLink_Identifier_{{databaseName}} map[string]any = map[string]any{
	// injection point for docLink to identifiers{{EntriesDocLinkStringDocLinkIdentifier}}
}

// init might be handy if one want to have the data embedded in the binary
// but it has to properly reference the Injection gateway in the main package
// func init() {
// 	_ = __Dummy_time_variable
// 	InjectionGateway["{{databaseName}}"] = {{databaseName}}Injection
// }

// {{databaseName}}Injection will stage objects of database "{{databaseName}}"
func {{databaseName}}Injection(stage *models.StageStruct) {

	// Declaration of instances to stage{{Identifiers}}

	// Setup of values{{ValueInitializers}}

	// Setup of pointers{{PointersInitializers}}
}

`

const IdentifiersDecls = `
	{{Identifier}} := (&models.{{GeneratedStructName}}{Name: ` + "`" + `{{GeneratedFieldNameValue}}` + "`" + `}).Stage(stage)`

const StringInitStatement = `
	{{Identifier}}.{{GeneratedFieldName}} = ` + "`" + `{{GeneratedFieldNameValue}}` + "`"

const StringEnumInitStatement = `
	{{Identifier}}.{{GeneratedFieldName}} = {{GeneratedFieldNameValue}}`

const NumberInitStatement = `
	{{Identifier}}.{{GeneratedFieldName}} = {{GeneratedFieldNameValue}}`

const PointerFieldInitStatement = `
	{{Identifier}}.{{GeneratedFieldName}} = {{GeneratedFieldNameValue}}`

const SliceOfPointersFieldInitStatement = `
	{{Identifier}}.{{GeneratedFieldName}} = append({{Identifier}}.{{GeneratedFieldName}}, {{GeneratedFieldNameValue}})`

const TimeInitStatement = `
	{{Identifier}}.{{GeneratedFieldName}}, _ = time.Parse("2006-01-02 15:04:05.999999999 -0700 MST", "{{GeneratedFieldNameValue}}")`

// Marshall marshall the stage content into the file as an instanciation into a stage
func (stage *StageStruct) Marshall(file *os.File, modelsPackageName, packageName string) {

	name := file.Name()

	if !strings.HasSuffix(name, ".go") {
		log.Fatalln(name + " is not a go filename")
	}

	log.Println("filename of marshall output is " + name)
	newBase := filepath.Base(file.Name())

	res := marshallRes
	res = strings.ReplaceAll(res, "{{databaseName}}", strings.ReplaceAll(newBase, ".go", ""))
	res = strings.ReplaceAll(res, "{{PackageName}}", packageName)
	res = strings.ReplaceAll(res, "{{ModelsPackageName}}", modelsPackageName)

	// map of identifiers
	// var StageMapDstructIds map[*Dstruct]string
	identifiersDecl := ""
	initializerStatements := ""
	pointersInitializesStatements := ""

	id := ""
	_ = id
	decl := ""
	_ = decl
	setValueField := ""
	_ = setValueField

	// insertion initialization of objects to stage
	map_A_Identifiers := make(map[*A]string)
	_ = map_A_Identifiers

	aOrdered := []*A{}
	for a := range stage.As {
		aOrdered = append(aOrdered, a)
	}
	sort.Slice(aOrdered[:], func(i, j int) bool {
		return aOrdered[i].Name < aOrdered[j].Name
	})
	identifiersDecl += "\n\n	// Declarations of staged instances of A"
	for idx, a := range aOrdered {

		id = generatesIdentifier("A", idx, a.Name)
		map_A_Identifiers[a] = id

		decl = IdentifiersDecls
		decl = strings.ReplaceAll(decl, "{{Identifier}}", id)
		decl = strings.ReplaceAll(decl, "{{GeneratedStructName}}", "A")
		decl = strings.ReplaceAll(decl, "{{GeneratedFieldNameValue}}", a.Name)
		identifiersDecl += decl

		initializerStatements += "\n\n	// A values setup"
		// Initialisation of values
		setValueField = StringInitStatement
		setValueField = strings.ReplaceAll(setValueField, "{{Identifier}}", id)
		setValueField = strings.ReplaceAll(setValueField, "{{GeneratedFieldName}}", "Name")
		setValueField = strings.ReplaceAll(setValueField, "{{GeneratedFieldNameValue}}", string(a.Name))
		initializerStatements += setValueField

	}

	// insertion initialization of objects to stage
	for idx, a := range aOrdered {
		var setPointerField string
		_ = setPointerField

		id = generatesIdentifier("A", idx, a.Name)
		map_A_Identifiers[a] = id

		// Initialisation of values
	}

	res = strings.ReplaceAll(res, "{{Identifiers}}", identifiersDecl)
	res = strings.ReplaceAll(res, "{{ValueInitializers}}", initializerStatements)
	res = strings.ReplaceAll(res, "{{PointersInitializers}}", pointersInitializesStatements)

	if stage.MetaPackageImportAlias != "" {
		res = strings.ReplaceAll(res, "{{ImportPackageDeclaration}}",
			fmt.Sprintf("\n\t%s %s", stage.MetaPackageImportAlias, stage.MetaPackageImportPath))

		res = strings.ReplaceAll(res, "{{ImportPackageDummyDeclaration}}",
			fmt.Sprintf("\nvar ___dummy__%s_%s %s.StageStruct",
				stage.MetaPackageImportAlias,
				strings.ReplaceAll(filepath.Base(name), ".go", ""),
				stage.MetaPackageImportAlias))

		var entries string

		// regenerate the map of doc link renaming
		// the key and value are set to the value because
		// if it has been renamed, this is the new value that matters
		valuesOrdered := make([]GONG__Identifier, 0)
		for _, value := range stage.Map_DocLink_Renaming {
			valuesOrdered = append(valuesOrdered, value)
		}
		sort.Slice(valuesOrdered[:], func(i, j int) bool {
			return valuesOrdered[i].Ident < valuesOrdered[j].Ident
		})
		for _, value := range valuesOrdered {

			// get the number of points in the value to find if it is a field
			// or a struct

			switch value.Type {
			case GONG__ENUM_CAST_INT:
				entries += fmt.Sprintf("\n\n\t\"%s\": %s(0),", value.Ident, value.Ident)
			case GONG__ENUM_CAST_STRING:
				entries += fmt.Sprintf("\n\n\t\"%s\": %s(\"\"),", value.Ident, value.Ident)
			case GONG__FIELD_VALUE:
				// substitute the second point with "{})."
				joker := "__substitute_for_first_point__"
				valueIdentifier := strings.Replace(value.Ident, ".", joker, 1)
				valueIdentifier = strings.Replace(valueIdentifier, ".", "{}).", 1)
				valueIdentifier = strings.Replace(valueIdentifier, joker, ".", 1)
				entries += fmt.Sprintf("\n\n\t\"%s\": (%s,", value.Ident, valueIdentifier)
			case GONG__IDENTIFIER_CONST:
				entries += fmt.Sprintf("\n\n\t\"%s\": %s,", value.Ident, value.Ident)
			case GONG__STRUCT_INSTANCE:
				entries += fmt.Sprintf("\n\n\t\"%s\": &(%s{}),", value.Ident, value.Ident)
			}
		}

		res = strings.ReplaceAll(res, "{{EntriesDocLinkStringDocLinkIdentifier}}", entries)
	}

	fmt.Fprintln(file, res)
}

// unique identifier per struct
func generatesIdentifier(gongStructName string, idx int, instanceName string) (identifier string) {

	identifier = instanceName
	// Make a Regex to say we only want letters and numbers
	reg, err := regexp.Compile("[^a-zA-Z0-9]+")
	if err != nil {
		log.Fatal(err)
	}
	processedString := reg.ReplaceAllString(instanceName, "_")

	identifier = fmt.Sprintf("__%s__%06d_%s", gongStructName, idx, processedString)

	return
}