mirror of
https://github.com/FJurmanovic/wallet-go-api.git
synced 2026-02-06 06:08:16 +00:00
partial repository layer added
This commit is contained in:
Fran Jurmanović
323
pkg/service/wallet.go
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323
pkg/service/wallet.go
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@@ -0,0 +1,323 @@
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package service
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import (
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"context"
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"fmt"
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"time"
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"wallet-api/pkg/model"
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"wallet-api/pkg/utl/common"
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"github.com/go-pg/pg/v10"
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)
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type WalletService struct {
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db *pg.DB
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subscriptionService *SubscriptionService
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}
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func NewWalletService(db *pg.DB, ss *SubscriptionService) *WalletService {
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return &WalletService{
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db: db,
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subscriptionService: ss,
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}
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}
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/*
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New
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Inserts row to wallets table.
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Args:
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context.Context: Application context
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*model.NewWalletBody: Object to be inserted
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Returns:
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*model.Wallet: Wallet object from database.
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*model.Exception: Exception payload.
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*/
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func (as *WalletService) New(ctx context.Context, am *model.NewWalletBody) (*model.Wallet, *model.Exception) {
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db := as.db.WithContext(ctx)
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exceptionReturn := new(model.Exception)
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walletModel := new(model.Wallet)
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walletModel.Init()
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walletModel.UserID = am.UserID
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walletModel.Name = am.Name
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_, err := db.Model(walletModel).Insert()
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if err != nil {
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exceptionReturn.StatusCode = 400
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exceptionReturn.ErrorCode = "400126"
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exceptionReturn.Message = fmt.Sprintf("Error inserting row in \"wallets\" table: %s", err)
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return nil, exceptionReturn
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}
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return walletModel, nil
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}
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/*
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Edit
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Updates row in wallets table by id.
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Args:
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context.Context: Application context
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*model.WalletEdit: Object to be edited
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string: id to search
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Returns:
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*model.Wallet: Wallet object from database.
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*model.Exception: Exception payload.
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*/
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func (as *WalletService) Edit(ctx context.Context, body *model.WalletEdit, id string) (*model.Wallet, *model.Exception) {
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db := as.db.WithContext(ctx)
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exceptionReturn := new(model.Exception)
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tm := new(model.Wallet)
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tm.Id = id
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tm.Name = body.Name
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tx, _ := db.Begin()
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defer tx.Rollback()
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_, err := tx.Model(tm).WherePK().UpdateNotZero()
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if err != nil {
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exceptionReturn.StatusCode = 400
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exceptionReturn.ErrorCode = "400127"
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exceptionReturn.Message = fmt.Sprintf("Error updating row in \"wallets\" table: %s", err)
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return nil, exceptionReturn
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}
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tx.Commit()
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return tm, nil
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}
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/*
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Get
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Gets row in wallets table by id.
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Args:
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context.Context: Application context
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string: id to search
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*model.Params: url query parameters
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Returns:
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*model.Wallet: Wallet object from database
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*model.Exception: Exception payload.
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*/
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func (as *WalletService) Get(ctx context.Context, id string, params *model.Params) (*model.Wallet, *model.Exception) {
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db := as.db.WithContext(ctx)
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exceptionReturn := new(model.Exception)
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wm := new(model.Wallet)
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wm.Id = id
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tx, _ := db.Begin()
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defer tx.Rollback()
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qry := tx.Model(wm)
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err := common.GenerateEmbed(qry, params.Embed).WherePK().Select()
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if err != nil {
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exceptionReturn.StatusCode = 400
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exceptionReturn.ErrorCode = "400128"
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exceptionReturn.Message = fmt.Sprintf("Error selecting row in \"wallets\" table: %s", err)
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return nil, exceptionReturn
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}
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tx.Commit()
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return wm, nil
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}
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/*
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GetAll
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Gets filtered rows from wallets table.
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Args:
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context.Context: Application context
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*model.Auth: Authentication object
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*model.FilteredResponse: filter options
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Returns:
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*model.Exception: Exception payload.
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*/
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func (as *WalletService) GetAll(ctx context.Context, am *model.Auth, filtered *model.FilteredResponse) *model.Exception {
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exceptionReturn := new(model.Exception)
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db := as.db.WithContext(ctx)
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wm := new([]model.Wallet)
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query := db.Model(wm).Where("? = ?", pg.Ident("user_id"), am.Id)
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err := FilteredResponse(query, wm, filtered)
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if err != nil {
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exceptionReturn.StatusCode = 400
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exceptionReturn.ErrorCode = "400134"
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exceptionReturn.Message = fmt.Sprintf("Error selecting rows in \"wallets\" table: %s", err)
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return exceptionReturn
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}
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return nil
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}
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/*
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GetHeader
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Gets row from wallets table.
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Calculates previous month, current and next month totals.
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Args:
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context.Context: Application context
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*model.Auth: Authentication object
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string: wallet id to search
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Returns:
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*model.WalletHeader: generated wallet header object
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*model.Exception: Exception payload.
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*/
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func (as *WalletService) GetHeader(ctx context.Context, am *model.Auth, walletId string) (*model.WalletHeader, *model.Exception) {
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db := as.db.WithContext(ctx)
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wm := new(model.WalletHeader)
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wallets := new([]model.WalletTransactions)
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transactions := new([]model.Transaction)
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subscriptions := new([]model.Subscription)
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transactionStatus := new(model.TransactionStatus)
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exceptionReturn := new(model.Exception)
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tx, _ := db.Begin()
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defer tx.Rollback()
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err := tx.Model(transactionStatus).Where("? = ?", pg.Ident("status"), "completed").Select()
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if err != nil {
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exceptionReturn.StatusCode = 400
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exceptionReturn.ErrorCode = "400130"
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exceptionReturn.Message = fmt.Sprintf("Error selecting row in \"transactionStatuses\" table: %s", err)
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return nil, exceptionReturn
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}
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query2 := tx.Model(subscriptions).Relation("Wallet").Where("wallet.? = ?", pg.Ident("user_id"), am.Id).Relation("TransactionType").Relation("SubscriptionType")
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if walletId != "" {
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query2.Where("? = ?", pg.Ident("wallet_id"), walletId)
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}
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query2.Select()
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if err != nil {
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exceptionReturn.StatusCode = 400
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exceptionReturn.ErrorCode = "400131"
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exceptionReturn.Message = fmt.Sprintf("Error selecting row in \"subscriptions\" table: %s", err)
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return nil, exceptionReturn
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}
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now := time.Now()
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currentYear, currentMonth, _ := now.Date()
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currentLocation := now.Location()
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firstOfMonth := time.Date(currentYear, currentMonth, 1, 0, 0, 0, 0, currentLocation)
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firstOfNextMonth := time.Date(currentYear, currentMonth+1, 1, 0, 0, 0, 0, currentLocation)
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firstOfMonthAfterNext := time.Date(currentYear, currentMonth+2, 1, 0, 0, 0, 0, currentLocation)
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query := tx.Model(transactions).Relation("Wallet").Where("wallet.? = ?", pg.Ident("user_id"), am.Id).Relation("TransactionType")
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if walletId != "" {
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query.Where("? = ?", pg.Ident("wallet_id"), walletId)
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}
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query = query.Where("? = ?", pg.Ident("transaction_status_id"), transactionStatus.Id)
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query.Select()
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if err != nil {
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exceptionReturn.StatusCode = 400
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exceptionReturn.ErrorCode = "400132"
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exceptionReturn.Message = fmt.Sprintf("Error selecting row in \"transactions\" table: %s", err)
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return nil, exceptionReturn
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}
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tx.Commit()
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for _, sub := range *subscriptions {
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stopDate := firstOfMonthAfterNext
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if sub.HasEnd && sub.EndDate.Before(firstOfMonthAfterNext) {
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stopDate = sub.EndDate
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}
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startDate := sub.StartDate
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for startDate.Before(stopDate) {
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trans := sub.ToTrans()
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trans.TransactionDate = startDate
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if startDate.After(firstOfNextMonth) || startDate.Equal(firstOfNextMonth) {
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*transactions = append(*transactions, *trans)
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}
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if sub.SubscriptionType.Type == "monthly" {
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startDate = startDate.AddDate(0, sub.CustomRange, 0)
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} else if sub.SubscriptionType.Type == "weekly" {
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startDate = startDate.AddDate(0, 0, 7*sub.CustomRange)
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} else if sub.SubscriptionType.Type == "daily" {
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startDate = startDate.AddDate(0, 0, sub.CustomRange)
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} else {
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startDate = startDate.AddDate(sub.CustomRange, 0, 0)
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}
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}
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}
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for _, trans := range *transactions {
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addWhere(wallets, trans.WalletID, trans)
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}
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for i, wallet := range *wallets {
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for _, trans := range wallet.Transactions {
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// tzFirstOfMonthAfterNext := firstOfMonthAfterNext.In(trans.TransactionDate.Location())
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// tzFirstOfNextMonth := firstOfNextMonth.In(trans.TransactionDate.Location())
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// tzFirstOfMonth := firstOfMonth.In(trans.TransactionDate.Location())
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if trans.TransactionDate.Before(firstOfNextMonth) && trans.TransactionDate.After(firstOfMonth) || trans.TransactionDate.Equal(firstOfMonth) {
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if trans.TransactionType.Type == "expense" {
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(*wallets)[i].CurrentBalance -= trans.Amount
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} else {
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(*wallets)[i].CurrentBalance += trans.Amount
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}
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} else if trans.TransactionDate.Before(firstOfMonthAfterNext) && trans.TransactionDate.After(firstOfNextMonth) {
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if trans.TransactionType.Type == "expense" {
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(*wallets)[i].NextMonth -= trans.Amount
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} else {
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(*wallets)[i].NextMonth += trans.Amount
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}
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} else if trans.TransactionDate.Before(firstOfMonth) {
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if trans.TransactionType.Type == "expense" {
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(*wallets)[i].LastMonth -= trans.Amount
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} else {
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(*wallets)[i].LastMonth += trans.Amount
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}
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}
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}
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}
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for _, wallet := range *wallets {
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wm.LastMonth += wallet.LastMonth
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wm.CurrentBalance += wallet.CurrentBalance + wallet.LastMonth
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wm.NextMonth += wallet.NextMonth + wallet.CurrentBalance + wallet.LastMonth
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}
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wm.Currency = "USD"
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wm.WalletId = walletId
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return wm, nil
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}
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/*
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addWhere
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Appends Transaction to the belonging walletId.
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If missing, it creates the item list.
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Args:
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*[]model.WalletTransactions: list to append to
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string: wallet id to check
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model.Transaction: Transaction to append
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Returns:
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*model.Exception: Exception payload.
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*/
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func addWhere(s *[]model.WalletTransactions, walletId string, e model.Transaction) {
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var exists bool
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for a := range *s {
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if (*s)[a].WalletId == walletId {
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(*s)[a].Transactions = append((*s)[a].Transactions, e)
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exists = true
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}
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}
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if !exists {
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var walletTransaction model.WalletTransactions
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walletTransaction.WalletId = walletId
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walletTransaction.Transactions = append(walletTransaction.Transactions, e)
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*s = append(*s, walletTransaction)
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}
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}
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