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// Package espn is a thin client over ESPN's public (unofficial) scoreboard
// API. It fetches one league's scoreboard and maps the JSON into the
// league-agnostic model types the UI consumes.
package espn
import (
"context"
"encoding/json"
"fmt"
"net/http"
"sort"
"strconv"
"strings"
"time"
"github.com/humdrum-tiv/sportsball/internal/model"
)
const baseURL = "https://site.api.espn.com/apis/site/v2/sports"
// Client fetches scoreboards. Safe for concurrent use.
type Client struct {
HTTP *http.Client
}
// New returns a Client with a sane default timeout.
func New() *Client {
return &Client{HTTP: &http.Client{Timeout: 10 * time.Second}}
}
// Scoreboard fetches and normalizes the current scoreboard for one league.
// On a given calendar day ESPN returns that day's slate; games carry their
// own state (pre/live/final) so the dashboard can bucket them.
func (c *Client) Scoreboard(ctx context.Context, l model.League) ([]model.Game, error) {
return c.scoreboard(ctx, l, "")
}
// ScoreboardRange fetches games for the inclusive [start, end] day window so
// the UI can show recent finals and upcoming schedules, not just today. ESPN
// accepts a "YYYYMMDD-YYYYMMDD" dates param.
func (c *Client) ScoreboardRange(ctx context.Context, l model.League, start, end time.Time) ([]model.Game, error) {
// limit is required: without it ESPN caps results (~50) and silently
// truncates dense, wide-window slates (e.g. MLB across 10+ days).
q := fmt.Sprintf("?dates=%s-%s&limit=300", start.Format("20060102"), end.Format("20060102"))
return c.scoreboard(ctx, l, q)
}
func (c *Client) scoreboard(ctx context.Context, l model.League, query string) ([]model.Game, error) {
url := fmt.Sprintf("%s/%s/%s/scoreboard%s", baseURL, l.Sport, l.Path, query)
req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
if err != nil {
return nil, err
}
resp, err := c.HTTP.Do(req)
if err != nil {
return nil, fmt.Errorf("fetch %s: %w", l.ID, err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("fetch %s: status %d", l.ID, resp.StatusCode)
}
var sb scoreboard
if err := json.NewDecoder(resp.Body).Decode(&sb); err != nil {
return nil, fmt.Errorf("decode %s: %w", l.ID, err)
}
games := make([]model.Game, 0, len(sb.Events))
for _, ev := range sb.Events {
if g, ok := mapEvent(l.ID, ev); ok {
games = append(games, g)
}
}
sortGames(games)
return games, nil
}
func mapEvent(id model.LeagueID, ev event) (model.Game, bool) {
if len(ev.Competitions) == 0 {
return model.Game{}, false
}
comp := ev.Competitions[0]
st := comp.Status
if st.Type.State == "" {
st = ev.Status
}
g := model.Game{
ID: ev.ID,
League: id,
Start: parseTime(ev.Date),
State: mapState(st.Type.State),
Detail: strings.TrimSpace(st.Type.Detail),
Clock: st.DisplayClock,
Period: st.Period,
Venue: comp.Venue.FullName,
}
if len(comp.Headlines) > 0 {
g.Headline = comp.Headlines[0].Description
}
for _, cmp := range comp.Competitors {
t := mapTeam(cmp)
if cmp.HomeAway == "home" {
g.Home = t
} else {
g.Away = t
}
}
if g.State == model.StateLive {
g.Situation = mapSituation(comp.Situation)
}
return g, true
}
// mapSituation converts ESPN's live competition situation into model.Situation,
// returning nil when there's nothing useful (no pitcher/batter resolved — the
// case for sports that don't ship a situation, or a between-innings gap).
func mapSituation(s situationJSON) *model.Situation {
pitcher := firstNonEmpty(s.Pitcher.Athlete.DisplayName, s.Pitcher.Athlete.ShortName)
batter := firstNonEmpty(s.Batter.Athlete.DisplayName, s.Batter.Athlete.ShortName)
if pitcher == "" && batter == "" {
return nil
}
return &model.Situation{
Balls: s.Balls, Strikes: s.Strikes, Outs: s.Outs,
OnFirst: s.OnFirst, OnSecond: s.OnSecond, OnThird: s.OnThird,
Pitcher: pitcher, Batter: batter,
PitcherLine: strings.TrimSpace(s.Pitcher.Summary),
BatterLine: strings.TrimSpace(s.Batter.Summary),
LastPlay: strings.TrimSpace(s.LastPlay.Text),
}
}
func mapTeam(c competitor) model.Team {
t := teamFromJSON(c.Team)
t.Score = atoi(c.Score)
t.Record = overallRecord(c.Records)
t.Winner = c.Winner
return t
}
// teamFromJSON maps the shared ESPN team object into a model.Team's identity
// and display fields (no per-game score/record/winner). Used by the scoreboard,
// standings, and schedule mappers.
func teamFromJSON(t teamJSON) model.Team {
name := t.ShortDisplayName
if name == "" {
name = t.Name
}
return model.Team{
ID: t.ID,
Abbr: t.Abbreviation,
Name: name,
FullName: t.DisplayName,
Color: t.Color,
AltColor: t.AlternateColor,
}
}
// overallRecord returns the "total" record summary if present, else the first.
func overallRecord(rs []record) string {
for _, r := range rs {
if r.Type == "total" {
return r.Summary
}
}
if len(rs) > 0 {
return rs[0].Summary
}
return ""
}
func mapState(s string) model.State {
switch s {
case "in":
return model.StateLive
case "post":
return model.StateFinal
default:
return model.StatePre
}
}
// sortGames orders live first, then upcoming (by start), then finals.
func sortGames(gs []model.Game) {
rank := func(s model.State) int {
switch s {
case model.StateLive:
return 0
case model.StatePre:
return 1
default:
return 2
}
}
sort.SliceStable(gs, func(i, j int) bool {
if rank(gs[i].State) != rank(gs[j].State) {
return rank(gs[i].State) < rank(gs[j].State)
}
return gs[i].Start.Before(gs[j].Start)
})
}
func parseTime(s string) time.Time {
t, err := time.Parse("2006-01-02T15:04Z", s)
if err != nil {
// ESPN sometimes uses full RFC3339 with seconds.
t, _ = time.Parse(time.RFC3339, s)
}
return t.Local()
}
func atoi(s string) int {
n, _ := strconv.Atoi(strings.TrimSpace(s))
return n
}
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