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|
package main
import (
"database/sql"
"fmt"
"strings"
)
func (app *App) createTables() error {
query1 := `CREATE TABLE IF NOT EXISTS shop(
id INTEGER PRIMARY KEY AUTO_INCREMENT,
name varchar(255) UNIQUE NOT NULL,
url varchar(255) UNIQUE NOT NULL,
short_url varchar(255) UNIQUE,
logo_url text,
shipping_costs int,
free_shipping text
)`
_, err := app.DB.Exec(query1)
if err != nil {
return err
}
query2 := `CREATE TABLE IF NOT EXISTS angebot (
id INTEGER PRIMARY KEY AUTO_INCREMENT,
name VARCHAR(255) NOT NULL,
abv DECIMAL(10,2) NOT NULL,
volume DECIMAL(10,2) NOT NULL,
age INT NOT NULL DEFAULT 0,
shop INT NOT NULL,
url VARCHAR(255) NOT NULL,
short_url TEXT,
original_price INT NOT NULL,
discounted_price INT NOT NULL,
base_price INT NOT NULL,
image_url TEXT,
spirit_type TEXT NOT NULL,
website TEXT,
website_raw TEXT NOT NULL,
valid_until INT NOT NULL DEFAULT 0,
created_at INT,
FOREIGN KEY(shop) REFERENCES shop(id),
UNIQUE(name,shop,volume,abv,original_price,discounted_price,valid_until),
UNIQUE(name,shop,url,created_at)
)`
_, err = app.DB.Exec(query2)
if err != nil {
return err
}
views := []string{"whisky", "wodka", "rum", "gin", "misc", "all"}
for _, v := range views {
var spirit_type string
if v == "misc" {
spirit_type = `spirit_type NOT IN ("` + strings.Join(views, `", "`) + `") AND`
} else if v == "all" {
spirit_type = "1 = 1 AND "
} else {
spirit_type = `spirit_type = "` + v + `" AND`
}
view_query := `CREATE OR REPLACE VIEW ` + v + `_view AS
SELECT
angebot.id, angebot.name, age, angebot.abv, angebot.volume, angebot.url as long_url, angebot.short_url as url, spirit_type,
original_price/100 as original_price, discounted_price/100 as discounted_price, angebot.base_price/100 as base_price, image_url,
shop.name as shop, shop.id as shop_id, shop.short_url as shop_url, shop.shipping_costs/100 as shipping_costs, shop.free_shipping,
ROUND(100-((discounted_price/original_price)*100)) AS procent, created_at
FROM angebot
JOIN shop ON angebot.shop = shop.id
WHERE
` + spirit_type + ` (valid_until = 0 OR valid_until > (SELECT UNIX_TIMESTAMP()))`
_, err = app.DB.Exec(view_query)
if err != nil {
return err
}
}
view_query := `CREATE OR REPLACE VIEW _intern_view AS SELECT angebot.id, angebot.name, angebot.abv, angebot.volume, angebot.url as long_url, angebot.short_url as url, spirit_type, original_price, discounted_price, base_price, shop.name as shop, shop.id as shop_id, shop.short_url as shop_url, created_at, valid_until
FROM angebot
JOIN shop ON angebot.shop = shop.id
WHERE (valid_until = 0 OR valid_until > (SELECT UNIX_TIMESTAMP()))`
_, err = app.DB.Exec(view_query)
if err != nil {
return err
}
return err
}
func (app *App) save_offer(W []Angebot) error {
query := `INSERT INTO angebot (shop, name, url, abv, volume, age, original_price, discounted_price, base_price, valid_until, image_url, website_raw, spirit_type, created_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`
stmt, err := app.DB.Prepare(query)
if err != nil {
Debug(err, "Save Offer: Preparing query failed")
return err
}
defer stmt.Close()
for _, o := range W {
var found int
if o.Discounted_price == 0 || o.Original_price == 0 {
continue
}
// resembles UNIQUE constraint
detect_duplicate_query := fmt.Sprintf(`SELECT 1 FROM _intern_view WHERE name = ? AND shop_id = %d AND volume = %4.2f AND abv = %4.2f AND original_price = %d AND discounted_price = %d AND valid_until = %d`, o.Shop, o.Volume, o.Abv, o.Original_price, o.Discounted_price, o.Valid_until)
err := app.DB.QueryRow(detect_duplicate_query, o.Name).Scan(&found)
if err == sql.ErrNoRows {
_, err = stmt.Exec(o.Shop, o.Name, o.Url, o.Abv, o.Volume, o.Age, o.Original_price, o.Discounted_price, o.Base_price, o.Valid_until, o.Image_url, o.Website, o.Spirit_type, app.Now)
if err != nil {
o.error_msg = err.Error()
o.error_ctx = fmt.Sprintf(`INSERT INTO angebot (shop, name, url, abv, volume, age, original_price, discounted_price, base_price, valid_until, image_url, spirit_type, created_at) VALUES (%d, "%s", "%s", %f, %f, %d, %d, %d, %d, %d, "%s", "%s", %d)`, o.Shop, o.Name, o.Url, o.Abv, o.Volume, o.Age, o.Original_price,
o.Discounted_price, o.Base_price, o.Valid_until, o.Image_url, o.Spirit_type, app.Now)
WarnOffer(o, fmt.Sprintf("Save Offer: Inserting offer failed (%d)", found))
}
DebugOffer(o, "database.go: Inserting offer.")
} else if err != nil {
o.error_msg = err.Error()
o.error_ctx = fmt.Sprintf(strings.Replace(detect_duplicate_query, "?", `"%s"`, 1), o.Name)
WarnOffer(o, "database.go: Duplicate query failed")
} /* else {
o.error_msg = "database.go: Duplicate detected"
o.error_ctx = fmt.Sprintf(strings.Replace(detect_duplicate_query, "?", `"%s"`, 1), o.Name)
DebugOffer(o, "database.go: Duplicate detected")
}*/
}
//return app.remove_expired(W)
return nil
}
func (app *App) remove_expired(W []Angebot, shop Shop) error {
query := `SELECT id, name, shop, volume, abv, original_price, discounted_price FROM angebot WHERE shop = ? AND created_at < ?
AND (valid_until = 0 OR valid_until > ?)`
rows, err := app.DB.Queryx(query, shop.Id, app.Now, app.Now)
if err != nil {
Debug(err, "Remove expired: Query failed")
return err
}
defer rows.Close()
for rows.Next() {
var offer_db Angebot
err = rows.StructScan(&offer_db)
if err != nil {
Debug(err, "Remove expired: Struct scan failed")
return err
}
if !app.offer_contains(W, offer_db) {
DebugOffer(offer_db, "Contains not - Set to expire")
expire_query := `UPDATE angebot SET valid_until = ? WHERE id = ?`
_, err = app.DB.Exec(expire_query, app.Now, offer_db.Id)
if err != nil {
offer_db.error_msg = err.Error()
offer_db.error_ctx = fmt.Sprintf("UPDATE angebot SET valid_until = %d WHERE id = %d", app.Now, offer_db.Id)
WarnOffer(offer_db, "Remove expired: Update failed")
return err
}
}
DebugOffer(offer_db, "Contains! DOES NOT EXPIRE!")
}
return nil
}
func (app *App) offer_contains(W []Angebot, offer_db Angebot) bool {
if len(W) < 1 {
return false
}
for _, v := range W {
// resembles UNIQUE constraint
if (v.Name == offer_db.Name) && (v.Shop == offer_db.Shop) && (v.Volume == offer_db.Volume) && (v.Abv == offer_db.Abv) && (v.Original_price == offer_db.Original_price) && (v.Discounted_price == offer_db.Discounted_price) && (v.Valid_until == offer_db.Valid_until) {
return true
}
}
return false
}
|
