Generate JSON booleans from Db - php

Question

I need to generate a JSON String using this format:
{"content":{"brands":1},"brands":[{"id":"1","name":"brand 1","description":"description","icon":"icon","url":"example.com","categories":{"1":"true","2":"true","3":"false","4":"false","5":"false","6":"false"}},{"id":"2","name":"brand2","description":"description","icon":"icon","url":"example.com","categories":{"1":"true","2":"true","3":"false","4":"false","5":"false","6":"false"}}]}
From this tables:
brands:
| id | name | description | icon | url |
|----|--------|-------------|------|-----|
| 1 | name 1 | description | icon | url |
| 2 | name 2 | description | icon | url |
| 3 | name 3 | description | icon | url |
| 4 | name 4 | description | icon | url |
| 5 | name 5 | description | icon | url |
| 6 | name 6 | description | icon | url |
categories:
| id | name | description | icon | url |
|----|--------|-------------|------|-----|
| 1 | name 1 | description | icon | url |
| 2 | name 2 | description | icon | url |
| 3 | name 3 | description | icon | url |
| 4 | name 4 | description | icon | url |
| 5 | name 5 | description | icon | url |
| 6 | name 6 | description | icon | url |
objects:
| id | id_brand | id_category |name | description | icon | url |
|----|----------|-------------|-------|-------------|------|-----|
| 1 | 1 | 1 |name 1 | description | icon | url |
| 2 | 1 | 2 |name 2 | description | icon | url |
| 3 | 2 | 1 |name 3 | description | icon | url |
| 4 | 2 | 2 |name 4 | description | icon | url |
this is my relevant code so far
public function actionBrand($id = null) {
if (empty($id)) {
// Obtiene datos de la base
$sql = "SELECT DISTINCT objects.id_brand AS id, brands.name AS name, brands.description AS description, brands.icon AS icon, brands.url AS url, objects.id_category, categories.name AS category " .
"FROM objects " .
"LEFT JOIN brands ON objects.id_brand = brands.id " .
"LEFT JOIN categories ON objects.id_category = categories.id " .
"ORDER BY objects.id_brand, objects.id_category ";
} else {
// Obtiene datos de la base
$sql = "SELECT DISTINCT objects.id_brand AS id, brands.name AS name, brands.description AS description, brands.icon AS icon, brands.url AS url, objects.id_category, categories.name AS category " .
"FROM objects " .
"LEFT JOIN brands ON objects.id_brand = brands.id " .
"LEFT JOIN categories ON objects.id_category = categories.id " .
"WHERE brands.id = " . (int) $id . " " .
"ORDER BY objects.id_brand, objects.id_category ";
}
$data = Yii::$app->db->createCommand($sql)
->queryAll();
// Obtiene categorias
$categories = Yii::$app->db->createCommand('SELECT id FROM categories ORDER BY id')
->queryAll();
if (!empty($data)) {
// Construye primer registro
$brands[0]['id'] = $data[0]['id'];
$brands[0]['name'] = $data[0]['name'];
$brands[0]['description'] = $data[0]['description'];
$brands[0]['icon'] = $data[0]['icon'];
$brands[0]['url'] = $data[0]['url'];
$total = count($data);
for ($i = 1, $j = 0; $i < $total; $i++) {
if ($brands[$j]['id'] == $data[$i]['id']) {
continue;
} else {
$j++;
$brands[$j]['id'] = $data[$i]['id'];
$brands[$j]['name'] = $data[$i]['name'];
$brands[$j]['description'] = $data[$i]['description'];
$brands[$j]['icon'] = $data[$i]['icon'];
$brands[$j]['url'] = $data[$i]['url'];
}
}
} else {
$brands = array();
}
// Construye y envia JSON
$json['content']['brands'] = count($brands);
$json['brands'] = $brands;
echo json_encode($json);
}
It generates the first part of the JSON that i need, but im stuck at the categories part i need to select the data from the base and convert it to id : (true)(false) on each brand
{"content":{"brands":1},"brands":[{"id":"1","name":"brand 1","description":"description","icon":"icon","url":"example.com"},{"id":"2","name":"brand2","description":"description","icon":"icon","url":"example.com"}]}
Can you help me?
Regards

Answer 1

After you are done building the brands, loop on the categories, searching brands for the existing id match. If it matches, then adjust a true false value for the categories. Then when the categories are completed, append them to every brand in a final loop.
$cleancats = [];
foreach ($categories as $cat) {
$result = false;
foreach($brands as $brand) {
if ($cat['id'] == $brand['id']) {
$result = true; break;
}
}
$cleancats[ $cat['id'] ] = $result;
}
array_walk ($brands,function(&$brand) use ($cleancats) {
$brand['categories'] = $cleancats;
});
(note put this after your for ($i = 1, $j = 0; $i < $total; $i++) loop ends)
That should get the categories to every brand in brands, as you would like.
If you need the categories to be a LITERAL "true" and "false" then adjust this one line above:
$cleancats[ $cat['id'] ] = ($result?'true':'false');