image challenge 2016 solution

controllers/handler.go

@@ -0,0 +1,77 @@
+package controllers
+
+import (
+	"net/http"
+
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/qube-cinema-assignment/challenge2016/models"
+)
+
+// Create a new distributor
+func CreateDistributorHandler(c *gin.Context) {
+	var req struct {
+		Name   string `json:"name"`
+		Parent string `json:"parent"`
+	}
+
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request"})
+		return
+	}
+
+	var parent *models.Distributor
+	if req.Parent != "" {
+		p, exists := models.DistributorStore[req.Parent]
+		if !exists {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "Parent distributor not found"})
+			return
+		}
+		parent = p
+	}
+
+	models.NewDistributor(req.Name, parent)
+	c.JSON(http.StatusOK, gin.H{"message": "Distributor created"})
+}
+
+// Add permissions to a distributor
+func AddPermissionHandler(c *gin.Context) {
+	name := c.Param("name")
+	distributor, exists := models.DistributorStore[name]
+	if !exists {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Distributor not found"})
+		return
+	}
+
+	var req struct {
+		Type   string `json:"type"`
+		Region string `json:"region"`
+	}
+
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request"})
+		return
+	}
+
+	if distributor.AddPermission(req.Type, strings.ToUpper(req.Region)) {
+		c.JSON(http.StatusOK, gin.H{"message": "Permission added"})
+	} else {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid permission"})
+	}
+}
+
+// Check distribution permission
+func CanDistributeHandler(c *gin.Context) {
+	name := c.Param("name")
+	regionCode := c.Query("region")
+
+	distributor, exists := models.DistributorStore[name]
+	if !exists {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Distributor not found"})
+		return
+	}
+
+	canDistribute := distributor.CanDistribute(strings.ToUpper(regionCode))
+	c.JSON(http.StatusOK, gin.H{"can_distribute": canDistribute})
+}

go.mod

@@ -0,0 +1,34 @@
+module github.com/qube-cinema-assignment/challenge2016
+
+go 1.22.5
+
+require github.com/gin-gonic/gin v1.10.0
+
+require (
+	github.com/bytedance/sonic v1.11.6 // indirect
+	github.com/bytedance/sonic/loader v0.1.1 // indirect
+	github.com/cloudwego/base64x v0.1.4 // indirect
+	github.com/cloudwego/iasm v0.2.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.20.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.12 // indirect
+	golang.org/x/arch v0.8.0 // indirect
+	golang.org/x/crypto v0.23.0 // indirect
+	golang.org/x/net v0.25.0 // indirect
+	golang.org/x/sys v0.20.0 // indirect
+	golang.org/x/text v0.15.0 // indirect
+	google.golang.org/protobuf v1.34.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,89 @@
+github.com/bytedance/sonic v1.11.6 h1:oUp34TzMlL+OY1OUWxHqsdkgC/Zfc85zGqw9siXjrc0=
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main.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/qube-cinema-assignment/challenge2016/routers"
+	"github.com/qube-cinema-assignment/challenge2016/storage"
+)
+
+func main() {
+	// Load CSV file on server startup
+	filepath := "cities.csv" // Update this path based on your project structure
+	err := storage.LoadCSVFromFile(filepath)
+	if err != nil {
+		log.Fatalf("Error loading CSV file: %v", err)
+	}
+	r := routers.InitRouters()
+	fmt.Println("Server is running  ...")
+	r.Run(":8080")
+}

models/models.go

@@ -0,0 +1,52 @@
+package models
+
+import (
+	"strings"
+)
+
+type Region struct {
+	ProvinceName string
+	CityName     string
+	CityCode     string
+	ProvinceCode string
+	CountryCode  string
+	CountryName  string
+	FullPath     string
+}
+
+// Distributor represents a distributor entity
+type Distributor struct {
+	Name        string
+	Parent      *Distributor
+	Permissions map[string]bool
+}
+
+// DistributorStore stores all distributors
+var DistributorStore = make(map[string]*Distributor)
+
+// NewDistributor creates a new distributor
+func NewDistributor(name string, parent *Distributor) *Distributor {
+	d := &Distributor{Name: name, Parent: parent, Permissions: make(map[string]bool)}
+	DistributorStore[name] = d
+	return d
+}
+
+// AddPermission adds a permission to the distributor
+func (d *Distributor) AddPermission(permissionType, region string) bool {
+	key := permissionType + ":" + region
+	if _, exists := d.Permissions[key]; !exists {
+		d.Permissions[key] = true
+		return true
+	}
+	return false
+}
+
+// CanDistribute checks if a distributor has permission to distribute in a region
+func (d *Distributor) CanDistribute(region string) bool {
+	for key := range d.Permissions {
+		if strings.HasSuffix(key, ":"+region) {
+			return true
+		}
+	}
+	return false
+}

routers/routers.go

@@ -0,0 +1,15 @@
+package routers
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/qube-cinema-assignment/challenge2016/controllers"
+)
+
+func InitRouters() *gin.Engine {
+	r := gin.Default()
+	// Define API endpoints
+	r.POST("/distributor", controllers.CreateDistributorHandler)
+	r.POST("/distributor/:name/permissions", controllers.AddPermissionHandler)
+	r.GET("/distributor/:name/can-distribute", controllers.CanDistributeHandler)
+	return r
+}

storage/storage.go

@@ -0,0 +1,59 @@
+package storage
+
+// read csv file to get the details
+
+import (
+	"encoding/csv"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/qube-cinema-assignment/challenge2016/models"
+)
+
+var (
+	Regions      = make(map[string]*models.Region)
+	Distributors = make(map[string]*models.Distributor)
+)
+
+// LoadCSVFromFile reads the CSV file from the local directory
+func LoadCSVFromFile(filepath string) error {
+	file, err := os.Open(filepath)
+	if err != nil {
+		return fmt.Errorf("failed to open CSV file: %w", err)
+	}
+	defer file.Close()
+
+	reader := csv.NewReader(file)
+	records, err := reader.ReadAll()
+	if err != nil {
+		return fmt.Errorf("failed to read CSV file: %w", err)
+	}
+
+	for _, record := range records {
+		if len(record) < 6 {
+			continue
+		}
+
+		cityCode := strings.ToUpper(record[0])
+		provinceCode := strings.ToUpper(record[1])
+		countryCode := strings.ToUpper(record[2])
+		cityName := record[3]
+		provinceName := record[4]
+		countryName := record[5]
+
+		fullPath := fmt.Sprintf("%s-%s-%s", cityCode, provinceCode, countryCode)
+		Regions[fullPath] = &models.Region{
+			CityName:     cityName,
+			CityCode:     cityCode,
+			ProvinceName: provinceName,
+			ProvinceCode: provinceCode,
+			CountryName:  countryName,
+			CountryCode:  countryCode,
+			FullPath:     fullPath,
+		}
+	}
+
+	fmt.Println("CSV Loaded Successfully from local directory")
+	return nil
+}