add basic paper model/view/controller

paper weight is missing

repositories/paperRepository.go

@@ -0,0 +1,82 @@
+package repositories
+
+import (
+	"strconv"
+
+	"gorm.io/gorm"
+
+	"git.dynamicdiscord.de/kalipso/zineshop/models"
+)
+
+type PaperRepository interface {
+	Create(models.Paper) (models.Paper, error)
+	GetAll() ([]models.Paper, error)
+	GetById(string) (models.Paper, error)
+	//GetByShopItemId(string) (models.Paper, error)
+	Update(models.Paper) (models.Paper, error)
+	DeleteById(string) error
+}
+
+type GORMPaperRepository struct {
+	DB *gorm.DB
+}
+
+func NewGORMPaperRepository(db *gorm.DB) PaperRepository {
+	return &GORMPaperRepository{
+		DB: db,
+	}
+}
+
+func (t *GORMPaperRepository) Create(tag models.Paper) (models.Paper, error) {
+	result := t.DB.Create(&tag)
+
+	if result.Error != nil {
+		return models.Paper{}, result.Error
+	}
+
+	return tag, nil
+}
+
+func (t *GORMPaperRepository) GetAll() ([]models.Paper, error) {
+	var tags []models.Paper
+	result := t.DB.Find(&tags)
+
+	return tags, result.Error
+}
+
+func (t *GORMPaperRepository) GetById(id string) (models.Paper, error) {
+	tagId, err := strconv.Atoi(id)
+
+	if err != nil {
+		return models.Paper{}, err
+	}
+
+	var tag models.Paper
+	result := t.DB.First(&tag, uint(tagId))
+
+	if result.Error != nil {
+		return models.Paper{}, result.Error
+	}
+
+	return tag, nil
+}
+
+func (t *GORMPaperRepository) Update(tag models.Paper) (models.Paper, error) {
+	result := t.DB.Save(&tag)
+	if result.Error != nil {
+		return models.Paper{}, result.Error
+	}
+
+	return tag, nil
+}
+
+func (t *GORMPaperRepository) DeleteById(id string) error {
+	tagId, err := strconv.Atoi(id)
+
+	if err != nil {
+		return err
+	}
+
+	result := t.DB.Delete(&models.Paper{}, tagId)
+	return result.Error
+}