/
main.go
170 lines (145 loc) · 3.3 KB
/
main.go
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package main
import (
"flag"
"fmt"
"io"
"log"
"os"
"strings"
"github.com/pkg/errors"
)
type searchResult struct {
// Whether details have been added, not for output
detailsAdded bool
number string
title string
kind string
respTeacher string
execTeacher string
unit string
sws string
link string
parallelGroups string
// The link to the details page, not for output
detailPageLink string
}
func msgln(args ...interface{}) {
fmt.Fprintln(os.Stderr, args...)
}
func msgf(format string, args ...interface{}) {
fmt.Fprintf(os.Stderr, format, args...)
}
func writeResultHeader(w io.Writer, detailsAdded bool) {
fmt.Fprintf(w, "%s|%s|%s|%s|%s|%s",
"Nummer", "Veranstaltungstitel", "Veranstaltungsart",
"Dozent/-in (verantw.)", "Dozent/-in (durchf.)", "Organisationseinheit")
if detailsAdded {
fmt.Fprintf(w, "|%s|%s\n", "SWS", "Link")
} else {
fmt.Fprintln(w)
}
}
func (r *searchResult) writeAsCSVRow(w io.Writer) {
fmt.Fprintf(w, "%s|%s|%s|%s|%s|%s",
r.number, r.title, r.kind, r.respTeacher, r.execTeacher, r.unit)
if r.detailsAdded {
fmt.Fprintf(w, "|%s|%s\n", r.sws, r.link)
} else {
fmt.Fprintln(w)
}
}
const (
summer = 1
winter = 2
)
type semester struct {
kind int
year int
}
func parseSemester(s string) (semester, error) {
var year int
var kind int
var semesterIndicator string
n, err := fmt.Sscanf(s, "%4d%s", &year, &semesterIndicator)
if err != nil || n < 2 {
return semester{}, errors.Errorf("malformed semester argument: %s", s)
}
semesterIndicator = strings.ToLower(semesterIndicator)
if semesterIndicator == "s" {
kind = summer
} else if semesterIndicator == "w" {
kind = winter
} else {
return semester{}, errors.Errorf("malformed semester argument: %s", s)
}
return semester{kind, year}, nil
}
func (s semester) fmtSelect() string {
return fmt.Sprintf("eq|%d|%d", s.kind, s.year)
}
func (s semester) fmtSelectInput() string {
var sem string
if s.kind == 1 {
sem = "Sommersemester"
} else if s.kind == 2 {
sem = "Wintersemester"
} else {
log.Fatalf("invalid semester: %v", s)
}
return fmt.Sprintf("%s+%d", sem, s.year)
}
func printUsage() {
msgf("usage: %s [opts] <pattern> <semester>\n", os.Args[0])
msgln()
msgln(" pattern")
msgln(" \tany valid wuestudy search pattern")
msgln(" semester")
msgln(" \tyyyy(s|w), e.g. 2020W for winter semester 2020")
msgln()
msgln("Available options:")
flag.PrintDefaults()
}
func run() error {
flag.Usage = printUsage
var collectDetails bool
flag.BoolVar(&collectDetails, "details", false, "fetch additional course details (may cause slowdown)")
flag.Parse()
args := flag.Args()
if len(args) != 2 {
printUsage()
os.Exit(1)
}
searchTerm := args[0]
semester := args[1]
sem, err := parseSemester(semester)
if err != nil {
return err
}
s := newSession(false)
s.establish()
s.submitSearch(searchTerm, sem)
s.getSearchResultDocument()
results := s.extractResultData()
if collectDetails {
s.addDetails(results)
}
if s.err != nil {
return s.err
}
if len(results) == 0 {
msgln("no results found")
return nil
}
writeResultHeader(os.Stdout, collectDetails)
for _, r := range results {
r.writeAsCSVRow(os.Stdout)
}
return nil
}
func main() {
if err := run(); err != nil {
msgln(err)
printUsage()
os.Exit(1)
}
}