feat: add script to download all of the images (#28)

fix #25

download-img.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+
+	parser "github.com/nikitavoloboev/markdown-parser"
+)
+
+func getMdFiles(path string) []string {
+	var fileNames []string
+	files, err := filepath.Glob(path + "/*.md")
+	if err != nil {
+		log.Fatal(err)
+	}
+	for _, f := range files {
+		fileNames = append(fileNames, f)
+	}
+	dir, err := ioutil.ReadDir(path + "/")
+	if err != nil {
+		log.Fatal(err)
+	}
+	for _, f := range dir {
+		if f.IsDir() && f.Name() != ".git" {
+			fileNames = append(fileNames, getMdFiles(path+"/"+f.Name())...)
+		}
+	}
+	return fileNames
+}
+
+func main() {
+	// Get all of the existing MD files
+	fileNames := getMdFiles(".")
+	// Get all of the image links and download them from all of the MD files
+	for _, f := range fileNames {
+		fileHandle, _ := os.Open("./" + f)
+		defer fileHandle.Close()
+		scanner := bufio.NewScanner(fileHandle)
+		for scanner.Scan() {
+			link := parser.ParseImageLink(scanner.Text())
+			if link != "" {
+				fmt.Println(link)
+				cmd := exec.Command("wget", link, "-P", "./imgs")
+				cmd.Stdout = os.Stdout
+				if err := cmd.Run(); err != nil {
+					log.Fatal(err)
+				}
+			}
+		}
+	}
+}