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calculate percentage difference in getSalesOverTime, getCountOverTime
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@creme332
creme332 committed Oct 9, 2024
1 parent 55a3264 commit f47585e
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Showing 2 changed files with 121 additions and 46 deletions.
82 changes: 68 additions & 14 deletions src/controllers/api/Orders.php
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Original file line number Diff line number Diff line change
Expand Up @@ -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:
* <pre>
* [
* {
* "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"
* }
* ]
* </pre>
Expand All @@ -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();
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85 changes: 53 additions & 32 deletions src/controllers/api/Reviews.php
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Original file line number Diff line number Diff line change
Expand Up @@ -206,47 +206,68 @@ public function deleteReview(): void
}

/**
* Gets the number of reviews for each month.
*
* <pre>
* [
* {
* "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"
* }
* ]
* </pre>
* Gets the number of reviews for each month with percentage difference from last month.
* Example response:
* <pre>
* [
* {
* "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"
* }
* ]
* </pre>
*
* @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();
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