mirror of
https://github.com/nprasad2077/NBA_Go.git
synced 2026-09-22 14:05:13 +00:00
shot chart service and models update
This commit is contained in:
@@ -0,0 +1,17 @@
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package services
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import "strconv"
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// mustAtoi parses s into an int, or returns 0 on error.
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func mustAtoi(s string) int {
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i, _ := strconv.Atoi(s)
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return i
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}
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// mustParseFloat parses s into a float64, or returns 0.0 on error.
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func mustParseFloat(s string) float64 {
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f, _ := strconv.ParseFloat(s, 64)
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return f
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}
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@@ -0,0 +1,155 @@
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// File: NBA_Go/services/player_advanced_scrape_service.go
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package services
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import (
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"bytes"
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"fmt"
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"io"
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"log"
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"net/http"
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"strings"
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"github.com/PuerkitoBio/goquery"
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"github.com/nprasad2077/NBA_Go/models"
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"gorm.io/gorm"
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"gorm.io/gorm/clause"
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)
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const (
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advancedURLFmt = "https://www.basketball-reference.com/leagues/NBA_%d_advanced.html"
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advancedPlayoffURLFmt = "https://www.basketball-reference.com/playoffs/NBA_%d_advanced.html"
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)
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// urlForAdvSeason picks the correct URL based on isPlayoff.
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func urlForAdvSeason(season int, isPlayoff bool) string {
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if isPlayoff {
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return fmt.Sprintf(advancedPlayoffURLFmt, season)
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}
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return fmt.Sprintf(advancedURLFmt, season)
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}
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// FetchAndStorePlayerAdvancedScrapedStats scrapes the advanced table
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// (regular or playoffs) and upserts into the PlayerAdvancedStat model.
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func FetchAndStorePlayerAdvancedScrapedStats(db *gorm.DB, season int, isPlayoff bool) error {
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url := urlForAdvSeason(season, isPlayoff)
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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return err
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}
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req.Header.Set("User-Agent", "Mozilla/5.0 (compatible)")
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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htmlBytes, err := io.ReadAll(resp.Body)
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if err != nil {
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return err
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}
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doc, err := goquery.NewDocumentFromReader(bytes.NewReader(htmlBytes))
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if err != nil {
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return err
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}
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// 📌 pick the right table selector
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var table *goquery.Selection
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if isPlayoff {
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table = doc.Find("#div_advanced_stats table#advanced_stats")
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} else {
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table = doc.Find("#div_advanced table#advanced")
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}
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if table.Length() == 0 {
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return fmt.Errorf("could not find advanced stats table")
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}
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// 1. collect the data-stat keys in header order
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var headers []string
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table.Find("thead tr th").Each(func(i int, th *goquery.Selection) {
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if stat, ok := th.Attr("data-stat"); ok && stat != "" {
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headers = append(headers, stat)
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}
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})
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// add our appended-player column
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headers = append(headers, "player-additional")
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// 2. iterate each row
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table.Find("tbody tr").Each(func(_ int, tr *goquery.Selection) {
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if tr.HasClass("thead") {
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return // skip repeated headers
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}
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cells := tr.Find("th, td")
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data := make(map[string]string, len(headers))
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var playerID string
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cells.Each(func(i int, cell *goquery.Selection) {
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key := headers[i]
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data[key] = strings.TrimSpace(cell.Text())
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if id, ok := cell.Attr("data-append-csv"); ok {
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playerID = id
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}
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})
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if playerID == "" {
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return // not a data row
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}
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data["player-additional"] = playerID
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// 3. map into your model
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stat := models.PlayerAdvancedStat{
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ExternalID: mustAtoi(data["rk"]),
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PlayerID: playerID,
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PlayerName: data["player"],
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Position: data["pos"],
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Age: mustAtoi(data["age"]),
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Games: mustAtoi(data["g"]),
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MinutesPlayed: mustAtoi(data["mp"]),
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PER: mustParseFloat(data["per"]),
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TSPercent: mustParseFloat(data["ts_pct"]),
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ThreePAR: mustParseFloat(data["three_par"]),
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FTR: mustParseFloat(data["ftr"]),
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OffensiveRBPercent: mustParseFloat(data["orb_pct"]),
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DefensiveRBPercent: mustParseFloat(data["drb_pct"]),
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TotalRBPercent: mustParseFloat(data["trb_pct"]),
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AssistPercent: mustParseFloat(data["ast_pct"]),
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StealPercent: mustParseFloat(data["stl_pct"]),
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BlockPercent: mustParseFloat(data["blk_pct"]),
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TurnoverPercent: mustParseFloat(data["tov_pct"]),
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UsagePercent: mustParseFloat(data["usg_pct"]),
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OffensiveWS: mustParseFloat(data["ows"]),
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DefensiveWS: mustParseFloat(data["dws"]),
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WinShares: mustParseFloat(data["ws"]),
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WinSharesPer: mustParseFloat(data["ws_per_48"]),
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OffensiveBox: mustParseFloat(data["obpm"]),
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DefensiveBox: mustParseFloat(data["dbpm"]),
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Box: mustParseFloat(data["bpm"]),
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VORP: mustParseFloat(data["vorp"]),
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Team: data["team_id"],
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Season: season,
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IsPlayoff: isPlayoff,
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}
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// 4. upsert
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if err := db.Clauses(clause.OnConflict{
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Columns: []clause.Column{
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{Name: "player_id"},
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{Name: "season"},
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{Name: "team"},
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{Name: "is_playoff"},
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},
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DoUpdates: clause.AssignmentColumns([]string{
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"external_id", "player_name", "position", "age", "games", "minutes_played",
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"per", "ts_percent", "three_par", "ftr",
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"offensive_rb_percent", "defensive_rb_percent", "total_rb_percent",
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"assist_percent", "steal_percent", "block_percent", "turnover_percent",
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"usage_percent", "offensive_ws", "defensive_ws", "win_shares",
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"win_shares_per", "offensive_box", "defensive_box", "box", "vorp",
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}),
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}).Create(&stat).Error; err != nil {
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log.Printf("Failed upsert advanced for %s: %v", stat.PlayerID, err)
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}
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})
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return nil
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}
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@@ -0,0 +1,206 @@
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// File: services/player_shot_chart_scrape_service.go
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package services
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import (
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"bytes"
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"fmt"
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"io"
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"log"
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"net/http"
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"strings"
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"github.com/PuerkitoBio/goquery"
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"golang.org/x/net/html"
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"github.com/nprasad2077/NBA_Go/models"
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"gorm.io/gorm"
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"gorm.io/gorm/clause"
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)
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// FetchAndStoreShotChartScrapedForPlayer scrapes the shot chart pages on
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// Basketball‑Reference for one player and upserts every shot into SQLite.
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// A *composite* unique key keeps duplicates out:
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//
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// (player_id, season, date, qtr, time_remaining, top, left)
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//
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// The model therefore needs a matching unique index (see models package).
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func FetchAndStoreShotChartScrapedForPlayer(
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db *gorm.DB,
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playerID string,
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startSeason, endSeason int,
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) error {
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// loop newest → oldest
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for season := startSeason; season >= endSeason; season-- {
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url := fmt.Sprintf(
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"https://www.basketball-reference.com/players/%s/%s/shooting/%d",
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playerID[:1], playerID, season,
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)
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// ─────────────────────── 1) HTTP GET ────────────────────────
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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return fmt.Errorf("request creation error for %d: %w", season, err)
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}
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req.Header.Set("User-Agent",
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"Mozilla/5.0 (Windows NT 10.0; Win64; x64) "+
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"AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36",
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)
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resp, err := (&http.Client{}).Do(req)
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if err != nil {
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return fmt.Errorf("HTTP error for %d: %w", season, err)
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}
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if resp.StatusCode != http.StatusOK {
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resp.Body.Close()
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return fmt.Errorf("unexpected status for %d: %s", season, resp.Status)
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}
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bodyBytes, err := io.ReadAll(resp.Body)
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resp.Body.Close()
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if err != nil {
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return fmt.Errorf("read error for %d: %w", season, err)
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}
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// ─────────────────── 2) player name (nice to have) ───────────
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fullDoc, err := goquery.NewDocumentFromReader(bytes.NewReader(bodyBytes))
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if err != nil {
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return fmt.Errorf("name‑parse error for %d: %w", season, err)
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}
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playerName := fullDoc.Find("#meta span[itemprop='name']").First().Text()
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if playerName == "" {
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playerName = playerID
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}
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// ───────────────── 3) commented‑out shot chart HTML ──────────
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shotHTML := extractCommentedShotChart(bodyBytes)
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if shotHTML == "" {
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log.Printf("⚠️ no shot‑chart comment found for %d", season)
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continue
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}
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doc, err := goquery.NewDocumentFromReader(strings.NewReader(shotHTML))
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if err != nil {
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return fmt.Errorf("snippet‑parse error for %d: %w", season, err)
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}
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wrapper := doc.Find("div#div_shot-chart div#shot-wrapper")
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if wrapper.Length() == 0 {
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log.Printf("⚠️ no shot‑wrapper for %d", season)
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continue
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}
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// ───────────────────── 4) scrape every tooltip ───────────────
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var firstErr error // surface the first DB failure after the loop
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wrapper.Find("div.tooltip.make, div.tooltip.miss").Each(func(_ int, s *goquery.Selection) {
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// position on the court
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style, _ := s.Attr("style")
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parts := strings.Split(style, ";")
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top := parsePx(parts[0])
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left := parsePx(parts[1])
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// tooltip text
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tip, _ := s.Attr("tip")
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tipParts := strings.Split(tip, "<br>")
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// date, team, opponent
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header := tipParts[0] // e.g. "Oct 20, 2021, CHI at DET"
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dateSegs := strings.SplitN(header, ", ", 3) // {"Oct 20", "2021", "CHI at DET"}
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date := dateSegs[0] + "," + dateSegs[1] // "Oct 20,2021"
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var team, opponent string
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if len(dateSegs) == 3 {
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game := dateSegs[2]
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if p := strings.SplitN(game, " at ", 2); len(p) == 2 {
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team, opponent = p[0], p[1]
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} else if p := strings.SplitN(game, " vs ", 2); len(p) == 2 {
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team, opponent = p[0], p[1]
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}
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}
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// quarter & time remaining
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qt := strings.SplitN(tipParts[1], ",", 2)
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quarter := qt[0]
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timeRem := strings.Fields(qt[1])[0]
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// result, shot type & distance
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rt := strings.Fields(tipParts[2]) // ["Made","2-pointer","..."|"Missed",...]
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made := rt[0] == "Made"
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shotType := rt[1]
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distance := mustAtoi(rt[len(rt)-2])
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// score & lead flag
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last := strings.Fields(tipParts[3])
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sc := strings.Split(last[len(last)-1], "-")
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teamScore, oppScore := mustAtoi(sc[0]), mustAtoi(sc[1])
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lead := teamScore > oppScore
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shot := models.PlayerShotChart{
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PlayerID: playerID,
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PlayerName: playerName,
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Top: top,
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Left: left,
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Date: date,
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Quarter: quarter,
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TimeRemaining: timeRem,
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Result: made,
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ShotType: shotType,
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DistanceFt: distance,
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Lead: lead,
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TeamScore: teamScore,
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OpponentTeamScore: oppScore,
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Opponent: opponent,
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Team: team,
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Season: season,
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}
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// ─────────────── 5) upsert / dedup ────────────────
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if err := db.Clauses(clause.OnConflict{
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Columns: []clause.Column{ // MUST match the unique index order
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{Name: "player_id"},
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{Name: "season"},
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{Name: "date"},
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{Name: "qtr"},
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{Name: "time_remaining"},
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{Name: "top"},
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{Name: "left"},
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},
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DoUpdates: clause.AssignmentColumns([]string{
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"player_name", "result", "shot_type", "distance_ft",
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"lead", "team_score", "opponent_team_score",
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"opponent", "team",
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}),
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}).Create(&shot).Error; err != nil && firstErr == nil {
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firstErr = err
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}
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})
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if firstErr != nil {
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return fmt.Errorf("DB upsert error for season %d: %w", season, firstErr)
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}
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}
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return nil
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}
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// extractCommentedShotChart returns the inner HTML of the comment block that
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// contains <div id="div_shot-chart" …>. BR hides the SVG there for ad reasons.
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func extractCommentedShotChart(htmlBytes []byte) string {
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root, err := html.Parse(bytes.NewReader(htmlBytes))
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if err != nil {
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return ""
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}
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var found string
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var walker func(*html.Node)
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walker = func(n *html.Node) {
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if n.Type == html.CommentNode && strings.Contains(n.Data, `id="div_shot-chart"`) {
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found = n.Data
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return
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}
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for c := n.FirstChild; c != nil && found == ""; c = c.NextSibling {
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walker(c)
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}
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}
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walker(root)
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return found
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}
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// parsePx turns "left:244px" or "top:18px" into int(244 / 18).
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func parsePx(s string) int {
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parts := strings.Split(s, ":")
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return mustAtoi(strings.TrimSuffix(parts[1], "px"))
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}
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@@ -1,76 +1,88 @@
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// File: services/player_shot_chart_fetch_service.go
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package services
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import (
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"encoding/json"
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"fmt"
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"log"
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"time"
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"encoding/json"
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"fmt"
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"log"
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"time"
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"github.com/nprasad2077/NBA_Go/models"
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"github.com/nprasad2077/NBA_Go/utils"
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"github.com/nprasad2077/NBA_Go/utils/metrics"
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"gorm.io/gorm"
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"gorm.io/gorm/clause"
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"github.com/nprasad2077/NBA_Go/models"
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"github.com/nprasad2077/NBA_Go/utils"
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"github.com/nprasad2077/NBA_Go/utils/metrics"
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"gorm.io/gorm"
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"gorm.io/gorm/clause"
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)
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// FetchAndStoreShotChartForPlayer fetches a single player's shot chart, parses
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// each shot's date into a season, and upserts into DB.
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func FetchAndStoreShotChartForPlayer(db *gorm.DB, playerId string) error {
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metrics.DBOperationsTotal.WithLabelValues("fetch", "player_shot_chart").Inc()
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// FetchAndStoreShotChartForPlayer pulls the public NBA‑API JSON for a single
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// player, derives the season from the shot date, and upserts into SQLite.
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// Dupes are prevented by the unique index:
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//
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// (player_id, season, date, qtr, time_remaining, top, left)
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func FetchAndStoreShotChartForPlayer(db *gorm.DB, playerID string) error {
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metrics.DBOperationsTotal.WithLabelValues("fetch", "player_shot_chart").Inc()
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url := fmt.Sprintf("http://rest.nbaapi.com/api/ShotChartData/playerid/%s", playerId)
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body, err := utils.GetJSON(url)
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if err != nil {
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return err
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}
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url := fmt.Sprintf("http://rest.nbaapi.com/api/ShotChartData/playerid/%s", playerID)
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body, err := utils.GetJSON(url)
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if err != nil {
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return err
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}
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var shots []models.PlayerShotChart
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if err := json.Unmarshal(body, &shots); err != nil {
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return err
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}
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var shots []models.PlayerShotChart
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if err := json.Unmarshal(body, &shots); err != nil {
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return err
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}
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for _, shot := range shots {
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// parse date "Feb 11, 2023" → time.Time
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if t, err := time.Parse("Jan 2, 2006", shot.Date); err == nil {
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shot.Season = t.Year()
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}
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for _, shot := range shots {
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// "Feb 11, 2023" → season 2023
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if t, err := time.Parse("Jan 2, 2006", shot.Date); err == nil {
|
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shot.Season = t.Year()
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}
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err := db.Clauses(clause.OnConflict{
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||||
Columns: []clause.Column{{Name: "player_id"}, {Name: "external_id"}},
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||||
DoUpdates: clause.AssignmentColumns([]string{
|
||||
"player_name", "top", "left", "date", "qtr",
|
||||
"time_remaining", "result", "shot_type", "distance_ft",
|
||||
"lead", "team_score", "opponent_team_score", "opponent",
|
||||
"team", "season",
|
||||
}),
|
||||
}).Create(&shot).Error
|
||||
err := db.Clauses(clause.OnConflict{
|
||||
Columns: []clause.Column{
|
||||
{Name: "player_id"},
|
||||
{Name: "season"},
|
||||
{Name: "date"},
|
||||
{Name: "qtr"},
|
||||
{Name: "time_remaining"},
|
||||
{Name: "top"},
|
||||
{Name: "left"},
|
||||
},
|
||||
// update mutable fields; leave the identity columns untouched
|
||||
DoUpdates: clause.AssignmentColumns([]string{
|
||||
"player_name", "result", "shot_type", "distance_ft",
|
||||
"lead", "team_score", "opponent_team_score",
|
||||
"opponent", "team",
|
||||
}),
|
||||
}).Create(&shot).Error
|
||||
|
||||
metrics.DBOperationsTotal.WithLabelValues("store", "player_shot_chart").Inc()
|
||||
metrics.DBOperationsTotal.WithLabelValues("store", "player_shot_chart").Inc()
|
||||
|
||||
if err != nil {
|
||||
log.Printf("Failed to upsert shot chart for %s id=%d: %v",
|
||||
shot.PlayerID, shot.ExternalID, err)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
if err != nil {
|
||||
log.Printf("❌ upsert failed for %s on %s (%s %s): %v",
|
||||
shot.PlayerID, shot.Date, shot.Quarter, shot.TimeRemaining, err)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// FetchAndStoreAllPlayerShotCharts loads every distinct playerId from your stats
|
||||
// tables and invokes the per-player fetch.
|
||||
// FetchAndStoreAllPlayerShotCharts enumerates every distinct player_id in your
|
||||
// totals table, then calls the per‑player loader. It sleeps ~1.1 s between
|
||||
// requests to stay well under public‑API rate limits.
|
||||
func FetchAndStoreAllPlayerShotCharts(db *gorm.DB) error {
|
||||
var playerIds []string
|
||||
var playerIDs []string
|
||||
|
||||
// gather from total stats (could also include advanced stats)
|
||||
db.Model(&models.PlayerTotalStat{}).
|
||||
Distinct("player_id").
|
||||
Pluck("player_id", &playerIds)
|
||||
// collect IDs (add other stats tables if needed)
|
||||
db.Model(&models.PlayerTotalStat{}).
|
||||
Distinct("player_id").
|
||||
Pluck("player_id", &playerIDs)
|
||||
|
||||
for _, pid := range playerIds {
|
||||
if err := FetchAndStoreShotChartForPlayer(db, pid); err != nil {
|
||||
log.Printf("Error importing shot chart for %s: %v", pid, err)
|
||||
}
|
||||
// throttle
|
||||
time.Sleep(1100 * time.Millisecond)
|
||||
}
|
||||
return nil
|
||||
for _, pid := range playerIDs {
|
||||
if err := FetchAndStoreShotChartForPlayer(db, pid); err != nil {
|
||||
log.Printf("Error importing shot chart for %s: %v", pid, err)
|
||||
}
|
||||
time.Sleep(1100 * time.Millisecond) // throttle
|
||||
}
|
||||
return nil
|
||||
}
|
||||
@@ -8,7 +8,6 @@ import (
|
||||
"io"
|
||||
"log"
|
||||
"net/http"
|
||||
"strconv"
|
||||
"strings"
|
||||
|
||||
"github.com/PuerkitoBio/goquery"
|
||||
@@ -156,16 +155,4 @@ func FetchAndStorePlayerTotalScrapedStats(db *gorm.DB, season int, isPlayoff boo
|
||||
})
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// mustAtoi parses integer or returns 0
|
||||
func mustAtoi(s string) int {
|
||||
i, _ := strconv.Atoi(s)
|
||||
return i
|
||||
}
|
||||
|
||||
// mustParseFloat parses float or returns 0.0
|
||||
func mustParseFloat(s string) float64 {
|
||||
f, _ := strconv.ParseFloat(s, 64)
|
||||
return f
|
||||
}
|
||||
Reference in New Issue
Block a user