Fetch player pos from postgres

cmd/mtwebmapper/players.go

@@ -7,6 +7,8 @@ package main
 import (
 	"bufio"
 	"bytes"
+	"context"
+	"database/sql"
 	"encoding/json"
 	"html/template"
 	"log"
@@ -16,6 +18,8 @@ import (
 	"sort"
 	"sync"
 	"time"
+
+	"bitbucket.org/s_l_teichmann/mtsatellite/common"
 )
 
 const sleepInterval = time.Second * 5
@@ -78,7 +82,38 @@ func (pls sortPlayersByName) Swap(i, j int) {
 	pls[i], pls[j] = pls[j], pls[i]
 }
 
+const selectPlayersSQL = `
+SELECT posx, posy, posz, name
+FROM player
+WHERE modification_date > now() - '2m'::interval`
+
+func playersFromPostgreSQL(connS string) ([]*player, error) {
+	db, err := sql.Open("pgx", connS)
+	if err != nil {
+		return nil, err
+	}
+	defer db.Close()
+	rows, err := db.QueryContext(context.Background(), selectPlayersSQL)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var pls []*player
+	for rows.Next() {
+		var p player
+		if err := rows.Scan(&p.Y, &p.Y, &p.Z, &p.Name); err != nil {
+			return nil, err
+		}
+		pls = append(pls, &p)
+	}
+	return pls, rows.Err()
+}
+
 func (ps *players) readFromFIFO() ([]*player, error) {
+	if host, ok := common.IsPostgreSQL(ps.fifo); ok {
+		return playersFromPostgreSQL(host)
+	}
+
 	file, err := os.Open(ps.fifo)
 	if err != nil {
 		return nil, err