Elektromarket/models/models.go

package models

import (
	"net/http"
	"html/template"
	"strconv"
)

type Page struct {
	Path string
	Template string
	Data map[string]interface{}
	DynamicDataLoader func(int) map[string]interface{}
}

func DynamicDataLoaderCategory(id int) map[string]interface{}{
	return map[string]interface{}{
		"category": GetCategoryById(id),
		"products": GetCategoryProducts(id),
	}
}

func DynamicDataLoaderProduct(id int) map[string]interface{}{
	return map[string]interface{}{
		"product": GetProductById(id),
	}
}

func (p Page) HandlePage(w http.ResponseWriter, r *http.Request) {
	if p.DynamicDataLoader != nil {
		id, err := strconv.Atoi(r.URL.Query()["id"][0])
		if err == nil {
      	p.Data = p.DynamicDataLoader(id)
   	}
	}
	t, _ := template.ParseFiles(p.Template, "templates/base.html")
	t.ExecuteTemplate(w, "base", p.Data)
}

type Category struct {
   Id int
   Name string
}

type Product struct {
   Id int
   Category Category
   Name string
   Description string
   ImgUrl string
   Quantity uint
   Price uint
}

var Pages map[string]Page
var Categories []Category
var Products []Product

func GetCategoryByName(name string) Category {
	var category Category
	for i:= range Categories {
		if Categories[i].Name == name {
			category = Categories[i]
			break
		}
	}
	return category
}

func GetCategoryById(id int) Category {
	var category Category
	for i:= range Categories {
		if Categories[i].Id == id {
			category = Categories[i]
			break
		}
	}
	return category
}

func GetCategoryProducts(id int) []Product {
	var products []Product
	for i:= range Products {
		if Products[i].Category.Id == id {
			products = append(products, Products[i])
		}
	}
	return products
}

func GetProductById(id int) Product {
	var product Product
	for i:= range Products {
		if Products[i].Id == id {
			product = Products[i]
			break
		}
	}
	return product
}