update PrintJob model and add Invoice

models/printer.go

@@ -2,6 +2,9 @@ package models
 
 import (
 	"fmt"
+	"git.dynamicdiscord.de/kalipso/zineshop/utils"
+	"gorm.io/gorm"
+	"math"
 	"os/exec"
 	"strings"
 )
@@ -18,12 +21,33 @@ const (
 	TriFold       PrintOption = "-o Fold=TriFold -o Binding=TopBinding"
 )
 
-type PrintJob struct {
+type OldPrintJob struct {
 	Pdf     string
 	Amount  uint
 	Options []PrintOption
 }
 
+type Invoice struct {
+	gorm.Model
+	PrintJobs     []PrintJob
+	PricePerClick float64
+	PartCosts     float64
+}
+
+type PrintJob struct {
+	gorm.Model
+	ShopItemID       uint
+	ShopItem         ShopItem
+	VariantID        uint
+	Variant          ItemVariant
+	PaperTypeId      uint
+	PaperType        Paper `gorm:"foreignKey:PaperTypeId"`
+	CoverPaperTypeId *uint
+	CoverPaperType   *Paper `gorm:"foreignKey:CoverPaperTypeId"`
+	Amount           uint
+	InvoiceID        uint
+}
+
 func GetPrintMode(mode string) PrintOption {
 	if mode == "LongEdge" {
 		return LongEdge
@@ -40,7 +64,7 @@ func GetPrintMode(mode string) PrintOption {
 	return CreateBooklet
 }
 
-func NewPrintJob(shopItem ShopItem, variant ItemVariant, coverPage bool, amount uint) (PrintJob, error) {
+func NewPrintJob(shopItem ShopItem, variant ItemVariant, paperType Paper, coverPaperType *Paper, amount uint) (PrintJob, error) {
 	if shopItem.Pdf == "" {
 		return PrintJob{}, fmt.Errorf("ShopItem has no PDF assigned")
 	}
@@ -49,32 +73,44 @@ func NewPrintJob(shopItem ShopItem, variant ItemVariant, coverPage bool, amount
 		return PrintJob{}, fmt.Errorf("Amount to big. This is denied for security reasons")
 	}
 
-	var result PrintJob
-	result.Pdf = shopItem.Pdf
-	result.Amount = amount
-
-	if variant.Name == "Colored" {
-		result.Options = append(result.Options, Colored)
+	result := PrintJob{
+		ShopItem:       shopItem,
+		Variant:        variant,
+		PaperType:      paperType,
+		CoverPaperType: coverPaperType,
+		Amount:         amount,
 	}
 
-	if coverPage {
-		result.Options = append(result.Options, CoverPage)
-	}
-
-	result.Options = append(result.Options, GetPrintMode(shopItem.PrintMode))
-
 	return result, nil
 }
 
+func (p *PrintJob) IsColored() bool {
+	return p.Variant.Name == "Colored"
+}
+
+func (p *PrintJob) GeneratePrintOptions() []PrintOption {
+	var result []PrintOption
+	if p.Variant.Name == "Colored" {
+		result = append(result, Colored)
+	}
+
+	if p.CoverPaperType != nil {
+		result = append(result, CoverPage)
+	}
+
+	result = append(result, GetPrintMode(p.ShopItem.PrintMode))
+	return result
+}
+
 func (p *PrintJob) Execute() error {
 	baseCommand := "lp -d KonicaBooklet"
 	baseCommand += fmt.Sprintf(" -n %v ", p.Amount)
 
-	for _, option := range p.Options {
+	for _, option := range p.GeneratePrintOptions() {
 		baseCommand += fmt.Sprintf(" %v ", option)
 	}
 
-	baseCommand += fmt.Sprintf(" -- %s", p.Pdf)
+	baseCommand += fmt.Sprintf(" -- %s", p.ShopItem.Pdf)
 
 	parts := strings.Fields(baseCommand)
 
@@ -91,3 +127,34 @@ func (p *PrintJob) Execute() error {
 	fmt.Printf("Output:\n%s\n", output)
 	return nil
 }
+
+func (p *PrintJob) CalculatePrintCosts() (float64, error) {
+	pageCount := utils.CountPagesAtPath(p.ShopItem.Pdf)
+	printMode := GetPrintMode(p.ShopItem.PrintMode)
+
+	//Get actual pagecount depending on printmode
+	actualPageCount := pageCount
+
+	if printMode == CreateBooklet {
+		dividedCount := float64(pageCount) / 4.0
+		actualPageCount = int(math.Ceil(dividedCount))
+	}
+
+	if printMode == LongEdge || printMode == ShortEdge {
+		dividedCount := float64(pageCount) / 2.0
+		actualPageCount = int(math.Ceil(dividedCount))
+	}
+
+	PPC := 0.002604
+	partCost := 0.0067
+	if p.IsColored() {
+		partCost = 0.0478
+	}
+	printingCosts := float64(actualPageCount) * p.PaperType.Price
+	printingCosts += float64(actualPageCount/2) * PPC
+	printingCosts += partCost * float64(actualPageCount)
+
+	fmt.Printf("Printing Costs per Zine: %v\n", printingCosts)
+	fmt.Printf("Printing Costs Total: %v\n", printingCosts*float64(p.Amount))
+	return printingCosts, nil
+}

models/shopItem.go

@@ -43,7 +43,7 @@ type ItemVariant struct {
 type ShopItem struct {
 	gorm.Model
 	Name        string        `json:"name" binding:"required" gorm:"unique;not null"`
-	Abstract    string        `json:"Abstract" binding:"required"`
+	Abstract    string        `json:"abstract" binding:"required"`
 	Description string        `json:"description" binding:"required"`
 	Category    Category      `json:"category"`
 	Variants    []ItemVariant `json:"variant"`