42 lines
1.4 KiB
Go
42 lines
1.4 KiB
Go
package services
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import (
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"git.solsynth.dev/hypernet/interactive/pkg/internal/database"
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"git.solsynth.dev/hypernet/interactive/pkg/internal/models"
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"time"
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)
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// GetFeaturedPosts How to determine featured posts?
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// Get the most upvoted posts in the last 7 days
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// And then how to get the upvote count of each post in the last 7 days?
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// We will get the reactions that attitude equals to 1 and created within the last 7 days
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// By the way, the upvote count will subtract the downvote count
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// Notice, this function is a raw query, it is not recommended to return the result directly
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// Instead, you should get the id and query it again via the ListPost function
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func GetFeaturedPosts(count int) ([]models.Post, error) {
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deadline := time.Now().Add(-7 * 24 * time.Hour)
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var posts []models.Post
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if err := database.C.Raw(`
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SELECT p.*, t.social_points
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FROM posts p
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JOIN (
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SELECT
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post_id,
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SUM(CASE WHEN attitude = 1 THEN 1 ELSE 0 END) -
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SUM(CASE WHEN attitude = 2 THEN 1 ELSE 0 END) AS social_points
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FROM reactions
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WHERE created_at >= ?
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GROUP BY post_id
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ORDER BY social_points DESC
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LIMIT ?
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) t ON p.id = t.post_id
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WHERE p.visibility = ?
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ORDER BY t.social_points DESC, p.published_at DESC
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`, deadline, count, models.PostVisibilityAll).Scan(&posts).Error; err != nil {
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return posts, err
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}
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return posts, nil
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}
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