119 lines
2.7 KiB
Go
119 lines
2.7 KiB
Go
package main
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import (
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"net/http"
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"net/http/cookiejar"
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"os"
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"strings"
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"golang.org/x/net/publicsuffix"
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)
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func initialize() {
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instance_url := os.Getenv("CANVAS_INSTANCE")
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if len(instance_url) == 0 {
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fmt.Println("The CANVAS_INSTANCE environment variable seems to be empty. Exiting.")
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os.Exit(1)
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}
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base_link = instance_url + "/api/v1"
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token = os.Getenv("CANVAS_API_KEY")
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if len(token) == 0 {
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fmt.Println("The CANVAS_API_KEY environment variable seems to be empty. Exiting.")
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os.Exit(1)
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}
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jar, _ := cookiejar.New(&cookiejar.Options{
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PublicSuffixList: publicsuffix.List,
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})
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client = http.Client{
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CheckRedirect: func(req *http.Request, via []*http.Request) error {
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if verbose {
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fmt.Println("Redirected to:", req.URL)
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fmt.Println(req.Cookies())
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}
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return nil
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},
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Jar: jar,
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}
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}
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func get_courses(token string, link string, client http.Client) []CanvasCourse {
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resp, err := client.Get(link)
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if err != nil {
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fmt.Println("Error performing GET request to get courses.")
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return nil
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}
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defer resp.Body.Close()
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body, _ := io.ReadAll(resp.Body)
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var canvas_courses []CanvasCourse
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err2 := json.Unmarshal(body, &canvas_courses)
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if err2 != nil {
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fmt.Println(err2)
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return nil
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}
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return canvas_courses
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}
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func init_aplus_toolid(course_id int) error {
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link := fmt.Sprintf("%s/courses/%d/external_tools?access_token=%s&search_term=aplus&include_parents=true", base_link, course_id, token)
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resp, err := client.Get(link)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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body, _ := io.ReadAll(resp.Body)
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var external_tools []ExternalTool
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err = json.Unmarshal(body, &external_tools)
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if err != nil && !strings.Contains(string(body), "\"unauthorized\"") {
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return err
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}
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for _, tool := range external_tools {
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if strings.Contains(tool.URL, ".aplusattendance.com/") {
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base_aplus_link = tool.URL
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external_tools_code = tool.ID
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return nil
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}
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}
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return errors.New("Could not find A+ link and tool ID")
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}
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func list_all_courses(onlyreturn bool) []CanvasCourse {
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all_courses := fmt.Sprintf("%s/courses?access_token=%s&enrollment_state=active&per_page=100", base_link, token)
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canvas_courses := get_courses(token, all_courses, client)
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if !onlyreturn {
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for _, course := range canvas_courses {
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fmt.Printf("%d, %s\n", course.ID%10000, course.Name)
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}
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return nil
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}
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return canvas_courses
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}
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func list_favorite_courses() {
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// course selection by user happens below
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favorites := fmt.Sprintf("%s/users/self/favorites/courses?access_token=%s&per_page=100", base_link, token)
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canvas_courses := get_courses(token, favorites, client)
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for _, course := range canvas_courses {
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fmt.Printf("%d, %s\n", course.ID%10000, course.Name)
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}
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}
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