signet-backend/endpoints/getrewardfunds.go

package endpoints

import (
	"encoding/json"
	"net/http"

	. "github.com/imosed/signet/data"
)

func getQualifiedRewardFunds() []RewardFund {
	var standalone []RewardFund
	var currentFromQueues []RewardFund
	var allQueues []RewardFund

	Db.Table("reward_funds").
		Select("reward_funds.id",
			"reward_funds.created_at",
			"reward_funds.updated_at",
			"reward_funds.deleted_at",
			"reward_funds.asset",
			"reward_funds.fund_wallet",
			"reward_funds.selling_wallet",
			"reward_funds.issuer_wallet",
			"reward_funds.memo",
			"reward_funds.price",
			"reward_funds.amount_available",
			"reward_funds.min_contribution",
			"reward_funds.title",
			"reward_funds.description").
		Joins("left outer join queue_orders qo on reward_funds.id = qo.reward_fund_id").
		Where("qo.reward_fund_id is null").
		Scan(&standalone)

	tempTable := Db.Table("contributions c").
		Select("c.reward_fund_id",
			"queue_id",
			"sum(amount) amt").
		Joins("inner join queue_orders qo on c.reward_fund_id = qo.reward_fund_id").
		Group("c.reward_fund_id").
		Group("qo.queue_id")

	Db.Table("reward_funds").
		Select("distinct on (qo.queue_id) reward_funds.id",
			"reward_funds.created_at",
			"reward_funds.updated_at",
			"reward_funds.deleted_at",
			"reward_funds.asset",
			"reward_funds.fund_wallet",
			"reward_funds.selling_wallet",
			"reward_funds.issuer_wallet",
			"reward_funds.memo",
			"reward_funds.price",
			"reward_funds.amount_available",
			"reward_funds.min_contribution",
			"reward_funds.title",
			"reward_funds.description").
		Joins("inner join queue_orders qo on reward_funds.id = qo.reward_fund_id").
		Joins("left join contributions c on reward_funds.id = c.reward_fund_id").
		Joins("inner join (?) tt on reward_funds.id = tt.reward_fund_id",
			tempTable,
			Db.Where("tt.amount < reward_funds.amount_available or tt.amount is null")).
		Order("qo.queue_id").
		Order("qo.order").
		Scan(&currentFromQueues)

	allQueues = append(standalone, currentFromQueues...)
	return allQueues
}

func GetRewardFunds(w http.ResponseWriter, r *http.Request) {
	var req GetRewardFundsRequest
	err := json.NewDecoder(r.Body).Decode(&req)
	if err != nil {
		panic("Could not decode body")
	}

	var resp GetRewardFundsResponse
	var rewardFunds []RewardFund
	rewardFunds = getQualifiedRewardFunds()

	for _, f := range rewardFunds {
		resp.RewardFunds = append(resp.RewardFunds, FundInfo{
			ID:              f.ID,
			CreatedAt:       f.CreatedAt,
			Asset:           f.Asset,
			FundWallet:      f.FundWallet,
			IssuerWallet:    f.IssuerWallet,
			Memo:            f.Memo,
			AmountAvailable: f.AmountAvailable,
			MinContribution: f.MinContribution,
			Title:           f.Title,
			Description:     f.Description,
			Bonuses:         f.Bonuses,
		})
	}

	err = json.NewEncoder(w).Encode(resp)
	if err != nil {
		panic("Could not deliver response")
	}
}

type GetRewardFundsRequest struct {
	Offset int `json:"offset"`
}

type GetRewardFundsResponse struct {
	RewardFunds []FundInfo `json:"rewardFunds"`
	Total       int64      `json:"total"`
}