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package main
import "database/sql"
import "strings"
type Ingredient struct {
Name string
Amount float64
Unit string
}
type Step struct {
Num int
Desc string
Time int
}
type Recipe struct {
Id int
Title string
Desc string
Photos []string
Serving_size int
Cook_time int
Rating int
Num_cooked int
Keywords []string
Ingredients []Ingredient
Steps []Step
}
func MakeRecipe() *Recipe {
var r Recipe
r = Recipe{
Id: 0,
Title: "",
Desc: "",
Serving_size: 0,
Cook_time: 0,
Rating: 5,
Num_cooked: 0,
Keywords: make([]string, 0),
Ingredients: make([]Ingredient, 0),
Steps: make([]Step, 0)}
return &r
}
func RecipeFromId(id int, db *sql.DB) *Recipe {
var rec Recipe
var ingr Ingredient
var step Step
rows := db.QueryRow(`SELECT title, photo_urls, keywords,
description, serving_size, cook_time, rating,
num_cooked FROM recipes WHERE id = $1`, id)
var rating, num_cooked, servings, cook_time int
var title, photo_urls, keywords, desc string
err := rows.Scan(&title, &photo_urls, &keywords, &desc,
&servings, &cook_time, &rating, &num_cooked)
if err == sql.ErrNoRows {
return nil
}
rec = Recipe{
Id: id,
Title: title,
Desc: desc,
Photos: make([]string, 0),
Serving_size: servings,
Cook_time: cook_time,
Rating: rating,
Num_cooked: num_cooked,
Keywords: make([]string, 0),
Ingredients: make([]Ingredient, 0),
Steps: make([]Step, 0)}
if len(photo_urls) > 0 {
photos := strings.Split(photo_urls, "|")
for _, p := range photos {
rec.Photos = append(rec.Photos, p)
}
}
if len(keywords) > 0 {
keyword_split := strings.Split(keywords, "|")
for _, k := range keyword_split {
rec.Keywords = append(rec.Keywords, k)
}
}
var name, unit string
var amount float64
rows_ingr, err := db.Query(`SELECT name, amount, unit
FROM ingredients WHERE recipe_id = $1`,
id)
defer rows_ingr.Close()
if err == nil {
var i int
for rows_ingr.Next() {
rows_ingr.Scan(&name, &amount, &unit)
ingr = Ingredient{
Name: name,
Amount: amount,
Unit: unit,
}
rec.Ingredients = append(rec.Ingredients, ingr)
}
}
var num, timer int
rows_steps, err := db.Query(`SELECT step, description, timer
FROM steps WHERE recipe_id = $1`, id)
defer rows_steps.Close()
if err == nil {
for rows_steps.Next() {
rows_steps.Scan(&num, &desc, &timer)
step = Step{
Num: num,
Desc: desc,
Time: timer,
}
rec.Steps = append(rec.Steps, step)
}
}
return &rec
}
func AddRecipeDB(r *Recipe, db *sql.DB) error {
var photo_urls, keywords strings.Builder
var id int
for _, u := range r.Photos {
photo_urls.WriteString(u)
photo_urls.WriteRune('|')
}
for _, k := range r.Keywords {
keywords.WriteString(k)
keywords.WriteRune('|')
}
err := db.QueryRow(`INSERT INTO recipes (title, photo_urls,
keywords, description, serving_size, cook_time,
rating, num_cooked)
VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
RETURNING id`,
r.Title, //1
photo_urls.String(), //2
keywords.String(), //3
r.Desc, //4
r.Serving_size, //5
r.Cook_time, //6
r.Rating, //7
r.Num_cooked, //8
).Scan(&id)
if err != nil {
return err
}
for i, ingr := range r.Ingredients {
res, err := db.Exec(`INSERT INTO ingredients
(id, name, amount, unit, recipe_id)
VALUES ($1, $2, $3, $4, $5)`,
i,
ingr.Name,
ingr.Amount,
ingr.Unit,
id,
)
if ra, _ := res.RowsAffected(); ra == 0 || err != nil {
r.Ingredients = append(r.Ingredients[:i],
r.Ingredients[i+1:]...)
}
}
for i, step := range r.Steps {
res, err := db.Exec(`INSERT INTO steps
(step, description, timer, recipe_id)
VALUES ($1, $2, $3, $4)`,
step.Num,
step.Desc,
step.Time,
id,
)
if ra, _ := res.RowsAffected(); ra == 0 || err != nil {
r.Ingredients = append(r.Ingredients[:i],
r.Ingredients[i+1:]...)
}
}
r.Id = id
return nil
}
|
