93 lines
2.9 KiB
Go
93 lines
2.9 KiB
Go
package sync
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import (
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"bufio"
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"crypto"
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"encoding/hex"
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"fmt"
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"io"
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"os"
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"path"
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"strings"
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"srs.epita.fr/fic-server/libfic"
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_ "golang.org/x/crypto/blake2b"
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)
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// SyncExerciceHints reads the content of hints/ directories and import it as EHint for the given challenge.
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func SyncExerciceHints(i Importer, exercice fic.Exercice) (errs []string) {
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params, err := parseExerciceParams(i, exercice.Path)
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if err != nil {
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errs = append(errs, fmt.Sprintf("%q: challenge.txt: %s", path.Base(exercice.Path), err))
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}
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if _, err := exercice.WipeHints(); err != nil {
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errs = append(errs, err.Error())
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} else if ! i.exists(path.Join(exercice.Path, "hints")) {
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return
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} else if hints, err := i.listDir(path.Join(exercice.Path, "hints")); err != nil {
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errs = append(errs, err.Error())
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} else {
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for n, hfile := range hints {
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// Find corresponding parameters
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var hint_title = fmt.Sprintf("Astuce #%d", n + 1)
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var hint_cost = exercice.Gain / 4
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for _, hp := range params.Hints {
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if hp.Filename == hfile {
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if hp.Cost > 0 {
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hint_cost = hp.Cost
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}
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if hp.Title != "" {
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hint_title = hp.Title
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}
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break
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}
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}
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// Extract hint content
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var hint_cnt string
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if fi, err := i.stat(path.Join(exercice.Path, "hints", hfile)); err != nil {
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errs = append(errs, fmt.Sprintf("%q: unable to add hint %q: %s", path.Base(exercice.Path), hfile, err))
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} else if ! fi.IsDir() && fi.Size() > 512 {
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// Handle big files as downloadable content
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if res, err := i.importFile(path.Join(exercice.Path, "hints", hfile), func(filePath string, origin string) (interface{}, error) {
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// Calculate hash
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hash512 := crypto.BLAKE2b_512.New()
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if fd, err := os.Open(filePath); err != nil {
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return nil, err
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} else {
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defer fd.Close()
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reader := bufio.NewReader(fd)
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if _, err := io.Copy(hash512, reader); err != nil {
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return nil, err
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}
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}
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result512 := hash512.Sum(nil)
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return "$FILES" + hex.EncodeToString(result512) + strings.TrimPrefix(filePath, fic.FilesDir), nil
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}); err != nil {
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errs = append(errs, fmt.Sprintf("%q: unable to import hint file %q: %s", path.Base(exercice.Path), hfile, err))
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continue
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} else if s, ok := res.(string); !ok {
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errs = append(errs, fmt.Sprintf("%q: unable to import hint file %q: invalid string returned as filename", path.Base(exercice.Path), hfile))
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continue
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} else {
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hint_cnt = s
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}
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} else if hint_cnt, err = getFileContent(i, path.Join(exercice.Path, "hints", hfile)); err != nil {
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errs = append(errs, fmt.Sprintf("%q: unable to read hint file %q: %s", path.Base(exercice.Path), hfile, err))
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continue
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}
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// Import hint
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if _, err := exercice.AddHint(hint_title, hint_cnt, hint_cost); err != nil {
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errs = append(errs, fmt.Sprintf("%q: unable to add hint %q: %s", path.Base(exercice.Path), hfile, err))
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}
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}
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}
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return
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}
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