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81 lines
1.5 KiB
Go

package main
import (
"database/sql"
_ "github.com/mattn/go-sqlite3"
"os"
)
var (
db *sql.DB
)
func dbconnect() {
var err error
db, err = sql.Open("sqlite3", "./exo.db")
if err != nil {
bail(E_No_DB, "couldn't connect to db: %v", err)
}
}
func planetsTable() {
stmnt := `create table if not exists planets (
id integer not null primary key autoincrement,
name text,
x integer,
y integer,
z integer,
planets integer
);`
if _, err := db.Exec(stmnt); err != nil {
log_error("couldn't create planets table: %v", err)
}
}
func planetsData() {
n, err := countPlanets()
if err != nil {
log_error("couldn't count planets: %v", err)
return
}
if n == 0 {
fi, err := os.Open(dataPath)
if err != nil {
bail(E_No_Data, "unable to open data path: %v", err)
}
c := make(chan System)
go speckStream(fi, c)
for planet := range c {
planet.Store(db)
}
}
indexPlanets(db)
}
func edgesTable() {
stmnt := `create table if not exists edges (
id_1 integer,
id_2 integer,
distance real
);`
if _, err := db.Exec(stmnt); err != nil {
log_error("couldn't create distance table: %v", err)
}
}
func setupDb() {
planetsTable()
planetsData()
edgesTable()
playersTable()
// fillEdges(db, idx)
}
func fillEdges(db *sql.DB, planets map[int]System) {
for i := 0; i < len(planets); i++ {
for j := i + 1; j < len(planets); j++ {
log_info("distance from %s to %s: %v", planets[i].name, planets[j].name, planetDistance(planets[i], planets[j]))
}
}
}