diff --git a/src/controllers/api/Orders.php b/src/controllers/api/Orders.php
index 186d5aa..04e6864 100644
--- a/src/controllers/api/Orders.php
+++ b/src/controllers/api/Orders.php
@@ -34,19 +34,43 @@ public function getAllOrders(): void
/**
* Get total revenue for each month.
*
- * Example:
+ * Each object includes:
+ * - The month (first day of the month).
+ * - The total number of orders for that month.
+ * - The total revenue for that month.
+ * - The percentage difference in total orders from the previous month.
+ * - The percentage difference in total revenue from the previous month.
*
+ * Example response:
*
* [
* {
- * "date": "2024-06-01",
+ * "month": "2024-06-01",
* "totalOrders": 1,
- * "totalRevenue": "3.49"
+ * "totalRevenue": "3.49",
+ * "percentageDifferenceOrders": null,
+ * "percentageDifferenceRevenue": null
* },
* {
- * "date": "2024-07-01",
+ * "month": "2024-07-01",
* "totalOrders": 9,
- * "totalRevenue": "40.91"
+ * "totalRevenue": "40.91",
+ * "percentageDifferenceOrders": "800.00",
+ * "percentageDifferenceRevenue": "1072.21"
+ * },
+ * {
+ * "month": "2024-08-01",
+ * "totalOrders": 1,
+ * "totalRevenue": "7.98",
+ * "percentageDifferenceOrders": "-88.89",
+ * "percentageDifferenceRevenue": "-80.49"
+ * },
+ * {
+ * "month": "2024-10-01",
+ * "totalOrders": 1,
+ * "totalRevenue": "7.98",
+ * "percentageDifferenceOrders": "0.00",
+ * "percentageDifferenceRevenue": "0.00"
* }
* ]
*
@@ -56,18 +80,48 @@ public function getAllOrders(): void
public function getSalesOverTime(): void
{
$query = <<< EOL
+ WITH monthly_stats AS (
+ SELECT
+ DATE_FORMAT(o.created_date, '%Y-%m-01') AS month, -- Group by month
+ COUNT(DISTINCT o.order_id) AS totalOrders, -- Count the number of unique orders
+ SUM(op.quantity * op.unit_price) AS totalRevenue -- Total revenue calculation
+ FROM
+ `order` o
+ JOIN
+ order_product op ON o.order_id = op.order_id
+ GROUP BY
+ DATE_FORMAT(o.created_date, '%Y-%m-01') -- Group by the first day of each month
+ ),
+ monthly_diff AS (
+ SELECT
+ month,
+ totalOrders,
+ totalRevenue,
+ LAG(totalOrders) OVER (ORDER BY month) AS previousMonthOrders, -- Get previous month's totalOrders
+ LAG(totalRevenue) OVER (ORDER BY month) AS previousMonthRevenue -- Get previous month's totalRevenue
+ FROM
+ monthly_stats
+ )
SELECT
- DATE_FORMAT(o.created_date, '%Y-%m-01') AS date, -- Group by month
- COUNT(DISTINCT o.order_id) AS totalOrders, -- Count the number of unique orders
- SUM(op.quantity * op.unit_price) AS totalRevenue -- Total revenue calculation
+ month,
+ totalOrders,
+ totalRevenue,
+ CASE
+ WHEN previousMonthOrders IS NOT NULL AND previousMonthOrders != 0 THEN
+ ROUND(((totalOrders - previousMonthOrders) * 100.0 / previousMonthOrders), 2)
+ ELSE
+ NULL -- No previous month data for the first row
+ END AS percentageDifferenceOrders,
+ CASE
+ WHEN previousMonthRevenue IS NOT NULL AND previousMonthRevenue != 0 THEN
+ ROUND(((totalRevenue - previousMonthRevenue) * 100.0 / previousMonthRevenue), 2)
+ ELSE
+ NULL -- No previous month data for the first row
+ END AS percentageDifferenceRevenue
FROM
- `order` o
- JOIN
- order_product op ON o.order_id = op.order_id
- GROUP BY
- DATE_FORMAT(o.created_date, '%Y-%m-01') -- Group by the first day of each month
+ monthly_diff
ORDER BY
- date; -- Order by date
+ month; -- Order by month
EOL;
$con = self::connect();
diff --git a/src/controllers/api/Reviews.php b/src/controllers/api/Reviews.php
index c93df02..94258d7 100644
--- a/src/controllers/api/Reviews.php
+++ b/src/controllers/api/Reviews.php
@@ -206,47 +206,68 @@ public function deleteReview(): void
}
/**
- * Gets the number of reviews for each month.
- *
- *
- * [
- * {
- * "date": "2024-04-01",
- * "totalReviews": 1,
- * "positiveReviews": "0",
- * "negativeReviews": "1"
- * },
- * {
- * "date": "2024-05-01",
- * "totalReviews": 9,
- * "positiveReviews": "4",
- * "negativeReviews": "5"
- * },
- * {
- * "date": "2024-06-01",
- * "totalReviews": 1,
- * "positiveReviews": "1",
- * "negativeReviews": "0"
- * }
- * ]
- *
+ * Gets the number of reviews for each month with percentage difference from last month.
+ * Example response:
+ *
+ * [
+ * {
+ * "month": "2024-04-01",
+ * "totalReviews": 1,
+ * "percentageDifference": null
+ * },
+ * {
+ * "month": "2024-05-01",
+ * "totalReviews": 9,
+ * "percentageDifference": "800.00"
+ * },
+ * {
+ * "month": "2024-06-01",
+ * "totalReviews": 1,
+ * "percentageDifference": "-88.89"
+ * },
+ * {
+ * "month": "2024-10-01",
+ * "totalReviews": 1,
+ * "percentageDifference": "0.00"
+ * }
+ * ]
+ *
*
* @return void
*/
public function getCountOverTime(): void
{
$query = <<< EOL
+ WITH monthly_reviews AS (
+ SELECT
+ DATE_FORMAT(created_date, '%Y-%m-01') AS month, -- Extract the first day of the month
+ COUNT(review_id) AS totalReviews -- Total reviews per month
+ FROM
+ review
+ GROUP BY
+ DATE_FORMAT(created_date, '%Y-%m')
+ ),
+ monthly_diff AS (
+ SELECT
+ month,
+ totalReviews,
+ LAG(totalReviews) OVER (ORDER BY month) AS previousMonthReviews -- Get the previous month's reviews
+ FROM
+ monthly_reviews
+ )
SELECT
- DATE_FORMAT(created_date, '%Y-%m-01') AS date, -- Group by month
- COUNT(*) AS totalReviews, -- Total number of reviews
- SUM(IF(rating >= 3, 1, 0)) AS positiveReviews, -- Count of positive reviews (rating 3 and above)
- SUM(IF(rating < 3, 1, 0)) AS negativeReviews -- Count of negative reviews (rating below 3)
+ month,
+ totalReviews,
+ CASE
+ WHEN previousMonthReviews IS NOT NULL AND previousMonthReviews != 0 THEN
+ ROUND(((totalReviews - previousMonthReviews) * 100.0 / previousMonthReviews), 2)
+ ELSE
+ NULL -- No previous month data for the first row
+ END AS percentageDifference
FROM
- review
- GROUP BY
- DATE_FORMAT(created_date, '%Y-%m-01') -- Group by the first day of each month
+ monthly_diff
ORDER BY
- date; -- Order by date
+ month;
EOL;
$con = self::connect();