134 lines
2.6 KiB
Go
134 lines
2.6 KiB
Go
package main
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import (
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// External
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"github.com/jmoiron/sqlx"
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_ "github.com/lib/pq"
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// Standard
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"embed"
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"errors"
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"fmt"
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"log"
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"strconv"
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)
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var (
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dbConn string
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db *sqlx.DB
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//go:embed sql/*
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embedded embed.FS
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)
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func dbInit() (err error) {// {{{
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dbConn = fmt.Sprintf(
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"host=%s port=%d user=%s password=%s dbname=%s sslmode=disable",
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config.Database.Host,
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config.Database.Port,
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config.Database.Username,
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config.Database.Password,
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config.Database.Name,
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)
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log.Printf(
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"\x1b[32mNotes\x1b[0m Connecting to database %s:%d\n",
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config.Database.Host,
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config.Database.Port,
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)
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if db, err = sqlx.Connect("postgres", dbConn); err != nil {
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return
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}
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if err = dbVerifyInternals(); err != nil {
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return
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}
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err = dbUpdate()
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return
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}// }}}
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func dbVerifyInternals() (err error) {// {{{
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var rows *sqlx.Rows
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if rows, err = db.Queryx(
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`SELECT EXISTS (
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SELECT FROM pg_catalog.pg_class c
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JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
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WHERE n.nspname = '_internal'
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AND c.relname = 'db'
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)`,
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); err != nil {
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return
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}
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defer rows.Close()
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var exists bool
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rows.Next()
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if err = rows.Scan(&exists); err != nil {
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return
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}
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if !exists {
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log.Printf("\x1b[32mNotes\x1b[0m Creating _internal.db\n")
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if _, err = db.Exec(`
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CREATE SCHEMA "_internal";
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CREATE TABLE "_internal".db (
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"key" varchar NOT NULL,
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value varchar NULL,
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CONSTRAINT db_pk PRIMARY KEY (key)
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);
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INSERT INTO _internal.db("key", "value")
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VALUES('schema', '0');
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`,
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); err != nil {
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return
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}
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}
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return
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}// }}}
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func dbUpdate() (err error) {// {{{
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/* Current schema revision is read from database.
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* Used to iterate through the embedded SQL updates
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* up to the DB_SCHEMA version currently compiled
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* program is made for. */
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var rows *sqlx.Rows
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var schemaStr string
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var schema int
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rows, err = db.Queryx(`SELECT value FROM _internal.db WHERE "key"='schema'`)
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if err != nil { return }
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defer rows.Close()
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if !rows.Next() {
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return errors.New("Table _interval.db missing schema row")
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}
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if err = rows.Scan(&schemaStr); err != nil {
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return
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}
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// Run updates
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schema, err = strconv.Atoi(schemaStr)
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if err != nil {
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return err
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}
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for i := (schema+1); i <= DB_SCHEMA; i++ {
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log.Printf("\x1b[32mNotes\x1b[0m Upgrading SQL schema to revision %d\n", i)
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sql, _ := embedded.ReadFile(
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fmt.Sprintf("sql/%04d.sql", i),
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)
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_, err = db.Exec(string(sql))
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if err != nil {
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return
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}
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_, err = db.Exec(`UPDATE _internal.db SET "value"=$1 WHERE "key"='schema'`, i)
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if err != nil {
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return
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}
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}
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return
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}// }}}
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// vim: foldmethod=marker
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