1 files changed, 102 insertions, 0 deletions
diff --git a/cantree/tree.go b/cantree/tree.go
new file mode 100644
index 0000000..8a7464f
--- /dev/null
+++ b/cantree/tree.go
@@ -0,0 +1,102 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+	"encoding/json"
+	"errors"
+	"io/fs"
+	"strconv"
+)
+
+var downloadKey string
+
+func request(dirID string) []byte {
+	req, err := http.NewRequest("GET", base+dirID, nil)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	req.Header.Add("Authorization", "Bearer "+downloadKey)
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	rt, err := io.ReadAll(resp.Body)
+	if err != nil {
+		log.Fatal(err)
+	}
+	resp.Body.Close()
+
+	return rt
+}
+
+func traverse(j map[string]interface{}) {
+	name := j["name"].(string)
+	/* Internally stored as float64.
+	Must be converted to int before string. */
+	id := strconv.Itoa(int(j["id"].(float64)))
+	fmt.Println(name, id)
+
+	var files []map[string]interface{}
+	var err error
+	str := "folders/" + string(id) + "/files"
+	fmt.Println(str)
+	err = json.Unmarshal(request("folders/"+string(id)+"/files"),
+		&files)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for _, i := range files {
+		for i, j := range i {
+			fmt.Printf("%s %v\n", i, j)
+		}
+	}
+
+	return
+	err = os.Mkdir(name, 0777)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	_ = os.Chdir(name)
+	defer os.Chdir("..")
+
+
+}
+
+// Traverse and download the contents of the Canvas API.
+func main() {
+	var set bool
+	downloadKey, set = os.LookupEnv("CANKEY")
+	if !set {
+		log.Fatal("Set the environment variable CANKEY to persistently contain your Canvas account API key.")
+	}
+
+	_, err := os.Stat("root")
+	if errors.Is(err, fs.ErrNotExist) {
+		os.Mkdir("root", 0777)
+	}
+	err = os.Chdir("root")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	body := request("users/self/folders")
+
+	var m []map[string]interface{}
+	err = json.Unmarshal(body, &m)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for _, i := range m {
+		traverse(i)
+	}
+}