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111 lines
2.1 KiB
Go
111 lines
2.1 KiB
Go
package main
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import (
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"database/sql"
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_ "github.com/mattn/go-sqlite3"
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"os"
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)
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var (
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db *sql.DB
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)
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func dbconnect() {
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var err error
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db, err = sql.Open("sqlite3", "./exo.db")
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if err != nil {
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bail(E_No_DB, "couldn't connect to db: %v", err)
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}
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}
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func planetsTable() {
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stmnt := `create table if not exists planets (
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id integer not null primary key autoincrement,
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name text,
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x integer,
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y integer,
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z integer,
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planets integer
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);`
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if _, err := db.Exec(stmnt); err != nil {
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log_error("couldn't create planets table: %v", err)
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}
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}
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func planetsData() {
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n, err := countPlanets()
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if err != nil {
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log_error("couldn't count planets: %v", err)
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return
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}
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if n == 0 {
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fi, err := os.Open(dataPath)
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if err != nil {
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bail(E_No_Data, "unable to open data path: %v", err)
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}
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c := make(chan System)
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go speckStream(fi, c)
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for planet := range c {
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planet.Store(db)
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}
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}
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indexPlanets(db)
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}
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func edgesTable() {
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stmnt := `create table if not exists edges (
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id_1 integer,
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id_2 integer,
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distance real
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);`
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if _, err := db.Exec(stmnt); err != nil {
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log_error("couldn't create distance table: %v", err)
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}
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}
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func setupDb() {
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planetsTable()
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planetsData()
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edgesTable()
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playersTable()
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fillEdges()
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}
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func fillEdges() {
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row := db.QueryRow(`select count(*) from edges;`)
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var n int
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if err := row.Scan(&n); err != nil {
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log_error("couldn't get number of edges: %v", err)
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return
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}
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if n > 0 {
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return
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}
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for i := 0; i < len(index); i++ {
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for j := 0; j < len(index); j++ {
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if i == j {
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continue
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}
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if index[i] == nil {
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log_error("wtf there's nil shit in here for id %d", i)
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continue
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}
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if index[j] == nil {
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log_error("wtf there's nil shit in here 2 for id %d", j)
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continue
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}
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dist := index[i].DistanceTo(index[j])
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log_info("distance from %s to %s: %v", index[i].name, index[j].name, dist)
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_, err := db.Exec(`
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insert into edges
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(id_1, id_2, distance)
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values
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(?, ?, ?)
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;`, i, j, dist)
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if err != nil {
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log_error("unable to write edge to db: %v", err)
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}
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}
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}
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}
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