session 1 example 8

session1/examples/example8/cmd/cli.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/marianina8/example8/utils"
+)
+
+func main() {
+	filename := flag.String("file", "", "Input file name")
+	flag.Parse()
+
+	if *filename == "" {
+		log.Fatal("Error: no input file specified")
+	}
+
+	yamlData, err := utils.Transform(*filename)
+	if err != nil {
+		log.Fatalf("Error: unable to transform the file; unexpected format: %v", err)
+		os.Exit(1)
+	}
+
+	fmt.Println(string(yamlData))
+}

session1/examples/example8/example.json

@@ -0,0 +1,13 @@
+{
+    "title": "Building Modern CLI Applications with Go",
+    "instructors": [
+        {
+            "name": "Marian Montagnino",
+            "email": "mmontagnino@netflix.com"
+        },
+        {
+            "name": "Romeric Philogene",
+            "email": "rphiologene@qovery.com"
+        }
+    ]
+}

session1/examples/example8/example.txt

@@ -0,0 +1,10 @@
+1: Lorem ipsum dolor sit amet, consectetur adipiscing elit.
+2: Sed in leo vestibulum, viverra libero eu, facilisis velit.
+3: Fusce faucibus nibh sed turpis sagittis bibendum.
+4: Integer luctus leo vel libero molestie, vitae consequat turpis venenatis.
+5: Quisque et tortor rutrum, lobortis arcu in, congue metus.
+6: Praesent dapibus sapien id nibh suscipit, at commodo quam suscipit.
+7: Nullam ullamcorper lorem eu sapien interdum, non posuere ipsum euismod.
+8: Pellentesque vel mauris nec turpis ultrices auctor.
+9: Curabitur gravida justo vel lacinia tempus.
+10: Donec commodo sapien vitae justo finibus sagittis.

session1/examples/example8/go.mod

@@ -0,0 +1,5 @@
+module github.com/marianina8/example8
+
+go 1.19
+
+require gopkg.in/yaml.v2 v2.4.0 // indirect

session1/examples/example8/go.sum

@@ -0,0 +1,3 @@
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=

session1/examples/example8/models/models.go

@@ -0,0 +1,11 @@
+package models
+
+type Instructor struct {
+	Name  string `json:"name"`
+	Email string `json:"email"`
+}
+
+type Workshop struct {
+	Title       string       `json:"title"`
+	Instructors []Instructor `json:"instructors"`
+}

session1/examples/example8/utils/transform.go

@@ -0,0 +1,36 @@
+package utils
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"os"
+
+	"github.com/marianina8/example8/models"
+	"gopkg.in/yaml.v2"
+)
+
+func Transform(filename string) ([]byte, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	bytes, err := ioutil.ReadAll(file)
+	if err != nil {
+		return nil, err
+	}
+
+	var jsonData models.Workshop
+	err = json.Unmarshal(bytes, &jsonData)
+	if err != nil {
+		return nil, err
+	}
+
+	yamlData, err := yaml.Marshal(&jsonData)
+	if err != nil {
+		return nil, err
+	}
+
+	return yamlData, nil
+}