feat(api): create cover letter

backend/models/cover/cover.go

@@ -0,0 +1,63 @@
+package cover
+
+import (
+	"backend/db"
+	"context"
+	"time"
+)
+
+type Template struct {
+	ID        int       `json:"id"`
+	UserID    int       `json:"user_id"`
+	Name      string    `json:"name"`
+	Letter    string    `json:"letter"`
+	CreatedAt time.Time `json:"created_at"`
+}
+
+func Get(where string, args ...any) ([]Template, error) {
+	// Create timeout context
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+
+	// Build query and execute
+	query := `SELECT * FROM cover_letters`
+	if where != "" {
+		query += " WHERE " + where
+	}
+
+	rows, err := db.Pool.Query(ctx, query, args...)
+	// Query executes query instantly, and returns error instantly
+	// Not like QueryRow, which executes query only on row.Scan
+	if err != nil {
+		return nil, err
+	}
+	// need to tell database to close the rows connection
+	// and free up resources
+	defer rows.Close()
+
+	// Prepeare results now
+	var results []Template
+	for rows.Next() {
+		var t Template
+		if err := rows.Scan(&t.ID, &t.UserID, &t.Name, &t.Letter, &t.CreatedAt); err != nil {
+			return nil, err
+		}
+
+		results = append(results, t)
+	}
+
+	return results, nil
+}
+
+func Create(name string, letter string, userId float64) error {
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+
+	// build query
+	query := `INSERT INTO cover_letters (name, letter, user_id) VALUES ($1, $2, $3)`
+
+	// execute query
+	_, err := db.Pool.Exec(ctx, query, name, letter, userId)
+
+	return err
+}