番組登録を追加（登録時の過去回の選択、一時停止・再開・解除、既知の回の記録）

internal/tver/series.go

@@ -0,0 +1,99 @@
+package tver
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/http"
+	"net/url"
+	"regexp"
+)
+
+var tverSeriesIDPattern = regexp.MustCompile(`^[A-Za-z0-9]+$`)
+
+type seriesContents struct {
+	Code   int `json:"code"`
+	Result struct {
+		Contents []struct {
+			Type    string  `json:"type"`
+			Content Episode `json:"content"`
+		} `json:"contents"`
+	} `json:"result"`
+}
+
+func (c *Client) FetchSeriesEpisodes(ctx context.Context, seriesID string) ([]Episode, error) {
+	if !tverSeriesIDPattern.MatchString(seriesID) {
+		return nil, errors.New("invalid series id")
+	}
+	seasonsURL := c.serviceURL.ResolveReference(&url.URL{Path: "/api/v1/callSeriesSeasons/" + seriesID})
+	request, err := http.NewRequestWithContext(ctx, http.MethodGet, seasonsURL.String(), nil)
+	if err != nil {
+		return nil, fmt.Errorf("series seasons request: %w", err)
+	}
+	setTVerHeaders(request)
+	var seasons seriesContents
+	if err := c.getJSON(request, &seasons); err != nil {
+		return nil, fmt.Errorf("series seasons: %w", err)
+	}
+	if seasons.Code != 0 || seasons.Result.Contents == nil {
+		return nil, fmt.Errorf("series seasons: invalid API result (code %d)", seasons.Code)
+	}
+	var seasonIDs []string
+	for _, item := range seasons.Result.Contents {
+		if item.Type != "season" {
+			continue
+		}
+		if !tverSeriesIDPattern.MatchString(item.Content.ID) {
+			return nil, errors.New("series seasons: invalid season id")
+		}
+		seasonIDs = append(seasonIDs, item.Content.ID)
+	}
+	if len(seasonIDs) == 0 {
+		return []Episode{}, nil
+	}
+	session, err := c.CreateSession(ctx)
+	if err != nil {
+		return nil, err
+	}
+	seen := make(map[string]bool)
+	var episodes []Episode
+	for _, seasonID := range seasonIDs {
+		endpoint := c.baseURL.ResolveReference(&url.URL{Path: "/service/api/v1/callSeasonEpisodes/" + seasonID})
+		query := endpoint.Query()
+		query.Set("platform_uid", session.PlatformUID)
+		query.Set("platform_token", session.PlatformToken)
+		endpoint.RawQuery = query.Encode()
+		request, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint.String(), nil)
+		if err != nil {
+			return nil, fmt.Errorf("season episodes request: %w", err)
+		}
+		setTVerHeaders(request)
+		var response seriesContents
+		if err := c.getJSON(request, &response); err != nil {
+			return nil, fmt.Errorf("season episodes: %w", err)
+		}
+		if response.Code != 0 || response.Result.Contents == nil {
+			return nil, fmt.Errorf("season episodes: invalid API result (code %d)", response.Code)
+		}
+		for _, item := range response.Result.Contents {
+			if item.Type != "episode" {
+				continue
+			}
+			ep := item.Content
+			if !tverSeriesIDPattern.MatchString(ep.ID) || ep.SeriesID != seriesID {
+				return nil, errors.New("season episodes: invalid episode identity")
+			}
+			if !seen[ep.ID] {
+				episodes = append(episodes, ep)
+				seen[ep.ID] = true
+			}
+		}
+	}
+	return episodes, nil
+}
+
+func setTVerHeaders(request *http.Request) {
+	request.Header.Set("x-tver-platform-type", "web")
+	request.Header.Set("Origin", "https://tver.jp")
+	request.Header.Set("Referer", "https://tver.jp/")
+}