implements crud app

data.go

@@ -0,0 +1,88 @@
+package main
+
+import "strconv"
+
+var data []Company
+
+type Company struct {
+	ID      string
+	Company string
+	Contact string
+	Country string
+}
+
+func init() {
+	data = []Company{
+		{
+			ID:      "1",
+			Company: "Amazon",
+			Contact: "Jeff Bezos",
+			Country: "United States",
+		},
+		{
+			ID:      "2",
+			Company: "Apple",
+			Contact: "Tim Cook",
+			Country: "United States",
+		},
+		{
+			ID:      "3",
+			Company: "Microsoft",
+			Contact: "Satya Nadella",
+			Country: "United States",
+		},
+	}
+}
+
+func getCompanyByID(id string) Company {
+	var result Company
+	for _, i := range data {
+		if i.ID == id {
+			result = i
+			break
+		}
+	}
+	return result
+}
+
+func updateCompany(company Company) {
+	result := []Company{}
+	for _, i := range data {
+		if i.ID == company.ID {
+			i.Company = company.Company
+			i.Contact = company.Contact
+			i.Country = company.Country
+		}
+		result = append(result, i)
+	}
+	data = result
+}
+
+func addCompany(company Company) {
+	max := 0
+	for _, i := range data {
+		n, _ := strconv.Atoi(i.ID)
+		if n > max {
+			max = n
+		}
+	}
+	max++
+	id := strconv.Itoa(max)
+
+	data = append(data, Company{
+		ID:      id,
+		Company: company.Company,
+		Contact: company.Contact,
+		Country: company.Country,
+	})
+}
+
+func deleteCompany(id string) {
+	result := []Company{}
+	for _, i := range data {
+		if i.ID != id {
+			result = append(result, i)
+		}
+	}
+	data = result
+}