shorgru/pkg/handler/admin/admin.go

package admin

import (
	"net/http"

	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
	"github.com/uptrace/bun"
	"sh.org.ru/pkg/config"
	"sh.org.ru/pkg/model"
	"sh.org.ru/pkg/tpl"
)

type Handler struct {
	db  *bun.DB
	cfg *config.Config
}

// NewHandler returns new Handler.
func NewHandler(db *bun.DB, cfg *config.Config) *Handler {
	return &Handler{
		db:  db,
		cfg: cfg,
	}
}

func (h *Handler) Register(g *echo.Group) {
	g.Use(middleware.BasicAuth(func(u, p string, ctx echo.Context) (bool, error) {
		return h.cfg.Admins[u] == p, nil
	}))

	g.GET("/", h.Admin)
	g.POST("/action", h.AdminAction)
	g.GET("/export", h.AdminExport)
}

func (h *Handler) Admin(c echo.Context) error {
	quotes := make([]model.Quote, 0, 20)
	count, err := h.db.NewSelect().
		Model((*model.Quote)(nil)).
		Order("id ASC").
		Where("approved = ?", false).
		ScanAndCount(c.Request().Context(), &quotes)
	if err != nil {
		return err
	}

	return tpl.Admin(quotes, count).Render(c.Request().Context(), c.Response())
}

func (h *Handler) AdminAction(c echo.Context) error {
	form := new(tpl.AdminForm)
	if err := c.Bind(form); err != nil {
		return err
	}

	switch form.Action {
	case "approve":
		_, err := h.db.NewUpdate().
			Model(&model.Quote{
				ID:       int64(form.ID),
				Approved: true,
			}).
			Column("approved").
			WherePK("id").
			Exec(c.Request().Context())
		if err != nil {
			return err
		}
	case "decline":
		_, err := h.db.NewDelete().
			Model(&model.Quote{
				ID: int64(form.ID),
			}).
			WherePK("id").
			Exec(c.Request().Context())
		if err != nil {
			return err
		}
	}

	return c.Redirect(http.StatusFound, "/admin/")
}

func (h *Handler) AdminExport(c echo.Context) error {
	quotes := []model.Quote{}
	err := h.db.NewSelect().
		Model((*model.Quote)(nil)).
		Order("id ASC").
		Scan(c.Request().Context(), &quotes)
	if err != nil {
		return err
	}

	quotesString := make([]string, 0, len(quotes))
	for _, q := range quotes {
		quotesString = append(quotesString, q.Quote)
	}

	return c.JSON(http.StatusOK, quotesString)
}