forked from schneider/mensa
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119 lines
2.6 KiB
119 lines
2.6 KiB
package main
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"regexp"
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"strings"
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"time"
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"github.com/PuerkitoBio/goquery"
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)
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type (
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// Meal contains the info about a meals
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Meal struct {
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Category string `json:"category"`
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Price string `json:"price"`
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Title string `json:"title"`
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}
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// Menu contains all info to menues in a mensa on one day
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Menu struct {
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Day int `json:"day"`
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Mensa string `json:"mensa"`
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Meals []Meal `json:"meals"`
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Date string `json:"date"`
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}
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)
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var (
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mensen = map[string]string{
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"Zentralmensa": "zentralmensa",
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"Nordmensa": "nordmensa",
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"Mensa+am+Turm": "turmmensa",
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"Mensa+Italia": "mensaitalia",
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"Bistro+HAWK": "bistrohawk",
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}
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trimRegex = regexp.MustCompile(`\s{2,}`)
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)
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func main() {
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path := "./"
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if len(os.Args) == 2 {
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path = os.Args[1] + "/"
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}
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for mensa := range mensen {
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for day := 1; day < 8; day = day + 1 {
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menu, err := operate(mensa, day)
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if err != nil {
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fmt.Println(err.Error())
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return
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}
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content, err := json.Marshal(menu)
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if err != nil {
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fmt.Println(err.Error())
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return
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}
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err = ioutil.WriteFile(fmt.Sprintf("%s/%s.%v.json", path, mensen[mensa], day), content, 0644)
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if err != nil {
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fmt.Println(err.Error())
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return
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}
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}
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}
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}
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func writeToFile(content []byte) error {
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err := ioutil.WriteFile(os.Args[1], content, 0644)
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if err != nil {
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return err
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}
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return nil
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}
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func operate(mensa string, day int) (Menu, error) {
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currentDay := int(time.Now().Weekday()) // week starts on sunday in go, but thats not relevant, because the canteen is closed on sunday
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push := 0
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if currentDay > day {
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push = 1
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}
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document, err := goquery.NewDocument(fmt.Sprintf("http://www.studentenwerk-goettingen.de/speiseplan.html?no_cache=1&day=%v&push=%v&selectmensa=%s", day, push, mensa))
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if err != nil {
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return Menu{}, err
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}
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meals, err := parseMeals(document)
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if err != nil {
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return Menu{}, err
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}
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date := parseDate(document)
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return Menu{Day: day, Mensa: mensa, Meals: meals, Date: date}, nil
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}
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func parseDate(doc *goquery.Document) string {
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return strip(doc.Find("#speise-head2_datum").Text())
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}
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func strip(old string) string {
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return strings.TrimSpace(trimRegex.ReplaceAllString(old, " "))
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}
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func parseMeals(doc *goquery.Document) ([]Meal, error) {
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meals := []Meal{}
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doc.Find("table.speise-tblmain tbody tr").Each(func(i int, s *goquery.Selection) {
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meal := Meal{
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Category: strip(s.Find(".ext_sits_preis").Text()), // yes, really preis
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Title: strip(s.Find(".ext_sits_essen").Text()),
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}
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meals = append(meals, meal)
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})
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return meals, nil
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}
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