zineshop/controllers/printController.go

package controllers

import (
	"fmt"
	"math"
	"net/http"
	"strconv"

	"git.dynamicdiscord.de/kalipso/zineshop/models"
	"git.dynamicdiscord.de/kalipso/zineshop/repositories"
	"git.dynamicdiscord.de/kalipso/zineshop/utils"
	"github.com/gin-gonic/gin"
)

type PrintController interface {
	PrintVariantView(*gin.Context)
	PrintCartView(*gin.Context)
	PrintOrderView(*gin.Context)
	PrintHandler(*gin.Context)
}

type printController struct{}

func NewPrintController() PrintController {
	return &printController{}
}

func (rc *printController) PrintVariantView(c *gin.Context) {
	variant, err := repositories.ShopItems.GetVariantById(c.Param("id"))

	if err != nil {
		c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
		return
	}

	shopItem, err := repositories.ShopItems.GetById(fmt.Sprintf("%v", variant.ShopItemID))

	if err != nil {
		c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
		return
	}

	type ShopItemVariantPair struct {
		ShopItem    models.ShopItem
		ItemVariant models.ItemVariant
	}

	data := CreateSessionData(c, gin.H{
		"itemVariants": []ShopItemVariantPair{
			{ShopItem: shopItem, ItemVariant: variant},
		},
	})

	fmt.Println(data)

	c.HTML(http.StatusOK, "printvariant.html", data)
}

func (rc *printController) PrintCartView(c *gin.Context) {
	sessionId := GetSessionId(c)

	cartItems, err := repositories.CartItems.GetAllBySession(sessionId)
	if err != nil {
		c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
		return
	}

	paper, err := repositories.Papers.GetAll()
	if err != nil {
		c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
		return
	}

	data := CreateSessionData(c, gin.H{
		"paper":     paper,
		"cartItems": cartItems,
	})

	c.HTML(http.StatusOK, "printvariant.html", data)
}

func (rc *printController) PrintOrderView(c *gin.Context) {
	order, err := repositories.Orders.GetByToken(c.Param("token"))

	if err != nil {
		c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
		return
	}

	paper, err := repositories.Papers.GetAll()
	if err != nil {
		c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
		return
	}

	cartItems := order.CartItems

	data := CreateSessionData(c, gin.H{
		"paper":     paper,
		"cartItems": cartItems,
	})

	c.HTML(http.StatusOK, "printvariant.html", data)
}

func (rc *printController) PrintHandler(c *gin.Context) {
	variantIds := c.PostFormArray("variant-id[]")
	variantAmounts := c.PostFormArray("variant-amount[]")
	variantPapertypes := c.PostFormArray("variant-papertype[]")
	variantCoverPages := c.PostFormArray("variant-coverpage[]")

	if len(variantIds) != len(variantAmounts) || len(variantIds) != len(variantCoverPages) {
		c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": "Invalid arguments"}})
		return
	}

	var printJobs []models.PrintJob
	for idx := range variantIds {
		variant, err := repositories.ShopItems.GetVariantById(variantIds[idx])

		if err != nil {
			c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
			return
		}

		shopItem, err := repositories.ShopItems.GetById(fmt.Sprintf("%v", variant.ShopItemID))

		if err != nil {
			c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
			return
		}

		paperType, err := repositories.Papers.GetById(fmt.Sprintf("%v", variantPapertypes[idx]))
		if err != nil {
			c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
			return
		}

		var coverPage models.Paper
		doPrintCoverpage := false
		if variantCoverPages[idx] != "0" {
			coverPage, err = repositories.Papers.GetById(fmt.Sprintf("%v", variantCoverPages[idx]))
			if err != nil {
				c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
				return
			}

			doPrintCoverpage = true
		}

		calculatePrintCosts := func(shopItem models.ShopItem, paperType models.Paper, coverPagePaperType models.Paper, colored bool, amount int) (float64, error) {
			pageCount := utils.CountPagesAtPath(shopItem.Pdf)
			printMode := models.GetPrintMode(shopItem.PrintMode)

			//Get actual pagecount depending on printmode
			actualPageCount := pageCount

			if printMode == models.CreateBooklet {
				dividedCount := float64(pageCount) / 4.0
				actualPageCount = int(math.Ceil(dividedCount))
			}

			if printMode == models.LongEdge || printMode == models.ShortEdge {
				dividedCount := float64(pageCount) / 2.0
				actualPageCount = int(math.Ceil(dividedCount))
			}

			PPC := 0.002604
			partCost := 0.0067
			if colored {
				partCost = 0.0478
			}
			printingCosts := float64(actualPageCount) * 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(amount))
			return printingCosts, nil
		}

		variantAmount, err := strconv.Atoi(variantAmounts[idx])
		if err != nil {
			c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
			return
		}

		fmt.Println("Printing Costs:")

		colored := variant.Name == "Colored"
		calculatePrintCosts(shopItem, paperType, coverPage, colored, int(variantAmount))

		printJob, err := models.NewPrintJob(shopItem, variant, doPrintCoverpage, uint(variantAmount))

		if err != nil {
			c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
			return
		}

		printJobs = append(printJobs, printJob)
	}

	executeJobs := func() {
		for _, printJob := range printJobs {
			printJob.Execute()
		}
	}

	go executeJobs()

	c.HTML(http.StatusOK, "index.html", nil)
}