96 lines
2.6 KiB
Go
96 lines
2.6 KiB
Go
package main
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import (
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"database/sql"
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"log"
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"time"
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)
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// Config : holds information about a specific Config
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type Config struct {
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ID int `json:"id"`
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Parameter string `json:"parameter"`
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Val string `json:"val"`
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CreatedAt time.Time `json:"createdAt"`
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UpdatedAt time.Time `json:"updatedAt"`
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}
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// Configs : a list of Config items
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type Configs []Config
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const configTableCreationQuery = `CREATE TABLE IF NOT EXISTS configs (
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id int(10) unsigned AUTO_INCREMENT,
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parameter varchar(255),
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val varchar(255),
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createdAt datetime,
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updatedAt datetime,
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UNIQUE KEY parameter (parameter),
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PRIMARY KEY (id)
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)`
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func ensureConfigTableExists(db *sql.DB) {
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if _, err := db.Exec(configTableCreationQuery); err != nil {
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log.Fatal(err)
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}
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}
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// getConfig : used during GET command
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func (c *Config) getConfig(db *sql.DB) error {
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return db.QueryRow("SELECT parameter, val, createdAt, updatedAt FROM configs WHERE id=?", c.ID).Scan(&c.Parameter, &c.Val, &c.CreatedAt, &c.UpdatedAt)
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}
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// updateConfig : used during PUT command
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func (c *Config) updateConfig(db *sql.DB) error {
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updStmt, updErr := db.Prepare("UPDATE configs SET parameter=?, val=?, updatedAt=? WHERE id=?")
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if updErr != nil {
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panic(updErr.Error()) // proper error handling instead of panic in your app
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}
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defer updStmt.Close() // Close the statement when we leave main() / the program terminates
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_, err := updStmt.Exec(c.Parameter, c.Val, time.Now(), c.ID)
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return err
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}
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// deleteConfig : used during DELETE command
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func (c *Config) deleteConfig(db *sql.DB) error {
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_, err := db.Exec("DELETE FROM configs WHERE id=?", c.ID)
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return err
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}
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// createConfig : used during PUSH command
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func (c *Config) createConfig(db *sql.DB) error {
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stmtIns, insErr := db.Prepare("INSERT INTO configs (parameter, val, createdAt, updatedAt) VALUES (?, ?, ?, ?);")
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if insErr != nil {
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panic(insErr.Error()) // proper error handling instead of panic in your app
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}
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defer stmtIns.Close() // Close the statement when we leave main() / the program terminates
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_, err := stmtIns.Exec(c.Parameter, c.Val, time.Now(), time.Now())
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return err
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}
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// getConfigs : used during GET command for all
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func getConfigs(db *sql.DB, start, count int) (Configs, error) {
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rows, err := db.Query(
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"SELECT id, parameter, val, createdAt, updatedAt FROM configs LIMIT ? OFFSET ?",
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count, start)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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configs := Configs{}
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for rows.Next() {
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var c Config
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if err := rows.Scan(&c.ID, &c.Parameter, &c.Val, &c.CreatedAt, &c.UpdatedAt); err != nil {
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return nil, err
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}
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configs = append(configs, c)
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}
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return configs, nil
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}
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