metarare_api-main/view/home.go--

package view

import (
	"errors"

	"github.com/metarare/metarare_api/api/constant"
	"github.com/metarare/metarare_api/common"

	"gorm.io/gorm"
)

type TokenSet struct {
	CuratingList []common.ExpItem `json:"curating_list"`
	SpecialBids  []common.ExpItem `json:"special_bids"`
	HotBids      []common.ExpItem `json:"hot_bids"`
	TimeAuctions []common.ExpItem `json:"time_auctions"`
	Collections  []CollectionInfo `json:"collections"`
	Explore      []common.ExpItem `json:"explore"`
}

func SelectHomeItems(db *gorm.DB, userID uint64) (error, TokenSet) {

	var _tokenSet TokenSet
	const curating_limit = 25
	// CuratingList
	_filter := common.Filter{
		Offset: 0,
		Limit:  25,
	}

	err := GetExploreItemQuery(db, _filter, userID).
		Where("collection.curating_number > 0 AND collection.curating_number < (?) AND sale.id NOT IN (?)", curating_limit, constant.HideFromListIds).
		Group("collection.curating_number").
		Find(&_tokenSet.CuratingList).Error

	if errors.Is(err, gorm.ErrRecordNotFound) {
		return err, _tokenSet
	}
	// Special bids
	var specialBidsTitle = ""
	err = db.Table("setting").Select("special_collection").Find(&specialBidsTitle).Error
	if errors.Is(err, gorm.ErrRecordNotFound) {
		return err, _tokenSet
	}
	_filter.Limit = 50
	err = GetExploreItemQuery(db, _filter, userID).
		Where("collection_profile.name =(?) AND sale.id NOT IN (?)", specialBidsTitle, constant.HideFromListIds).
		Order("token.lastest_price desc").
		Find(&_tokenSet.SpecialBids).Error

	if errors.Is(err, gorm.ErrRecordNotFound) {
		return err, _tokenSet
	}

	//Auction
	_filter.Limit = 50
	_filter.SaleType = "auction"

	err = GetExploreItemQuery(db, _filter, userID).
		Where("sale.id NOT IN (?)", constant.HideFromListIds).
		Order("sale.updated_at desc").
		Find(&_tokenSet.HotBids).Error

	if errors.Is(err, gorm.ErrRecordNotFound) {
		return err, _tokenSet
	}
	// Time Auction
	_filter.Limit = 50
	_filter.SaleType = "time"

	err = GetExploreItemQuery(db, _filter, userID).
		Where("AND sale.id NOT IN (?)", constant.HideFromListIds).
		Order("sale.updated_at desc").
		Find(&_tokenSet.TimeAuctions).Error

	if errors.Is(err, gorm.ErrRecordNotFound) {
		return err, _tokenSet
	}
	// Collection
	_filter.Limit = 50
	_filter.SaleType = ""

	var collectionIDs []uint64

	db.Table("collection").Select("id").Order("rand()").Limit(20).Find(&collectionIDs)

	_tokenSet.Collections, err = GetCollectionInfomation(db, collectionIDs, userID)
	if errors.Is(err, gorm.ErrRecordNotFound) {
		return err, _tokenSet
	}

	//Exp
	err = GetExploreItemQuery(db, _filter, userID).
		Where("AND sale.id NOT IN (?)", constant.HideFromListIds).
		Find(&_tokenSet.Explore).Error
	if errors.Is(err, gorm.ErrRecordNotFound) {
		return err, _tokenSet
	}

	return nil, _tokenSet
}