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creator.go
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creator.go
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package importer
import (
"errors"
"fmt"
"github.com/envelope-zero/backend/v3/pkg/models"
"github.com/google/uuid"
"golang.org/x/exp/slices"
"gorm.io/gorm"
)
func Create(db *gorm.DB, resources ParsedResources) (models.Budget, error) {
// Start a transaction so we can roll back all created resources if an error occurs
tx := db.Begin()
// Create the budget
budget := resources.Budget
err := tx.Create(&budget).Error
if err != nil {
tx.Rollback()
return models.Budget{}, err
}
// Create accounts
for idx, account := range resources.Accounts {
account.AccountCreate.BudgetID = budget.ID
err := tx.Create(&account).Error
if err != nil {
tx.Rollback()
return models.Budget{}, err
}
// Update the account in the resources struct so that it also contains the ID
resources.Accounts[idx] = account
}
// Create Match Rules
for _, matchRule := range resources.MatchRules {
aIdx := slices.IndexFunc(resources.Accounts, func(a models.Account) bool { return a.Name == matchRule.Account })
if aIdx == -1 {
tx.Rollback()
return models.Budget{}, fmt.Errorf("the account '%s' specified in the Match Rule matching '%s' could not be found in the list of Accounts", matchRule.Account, matchRule.Match)
}
matchRule.MatchRule.AccountID = resources.Accounts[aIdx].ID
err := tx.Create(&matchRule.MatchRule).Error
if err != nil {
tx.Rollback()
return models.Budget{}, err
}
}
for cName, category := range resources.Categories {
category.Model.BudgetID = budget.ID
err := tx.Create(&category.Model).Error
if err != nil {
tx.Rollback()
return models.Budget{}, err
}
resources.Categories[cName] = category
// Add all envelopes
for eName, envelope := range category.Envelopes {
envelope.Model.CategoryID = category.Model.ID
err := tx.Create(&envelope.Model).Error
if err != nil {
tx.Rollback()
return models.Budget{}, err
}
resources.Categories[category.Model.Name].Envelopes[eName] = envelope
}
}
// Create transactions
for _, r := range resources.Transactions {
if r.Model.Amount.IsNegative() {
return models.Budget{}, errors.New("a transaction to be imported has a negative amount, this is invalid")
}
transaction := r.Model
transaction.BudgetID = budget.ID
// Find the source account and set it
idx := slices.IndexFunc(resources.Accounts, func(a models.Account) bool {
return a.ImportHash == r.SourceAccountHash
})
transaction.SourceAccountID = resources.Accounts[idx].ID
// Find the destination account and set it
idx = slices.IndexFunc(resources.Accounts, func(a models.Account) bool {
return a.ImportHash == r.DestinationAccountHash
})
transaction.DestinationAccountID = resources.Accounts[idx].ID
envelopeID := resources.Categories[r.Category].Envelopes[r.Envelope].Model.ID
if envelopeID != uuid.Nil {
transaction.EnvelopeID = &envelopeID
}
err := tx.Create(&transaction).Error
if err != nil {
tx.Rollback()
return models.Budget{}, err
}
}
// Create allocations
for _, a := range resources.Allocations {
allocation := a.Model
allocation.AllocationCreate.EnvelopeID = resources.Categories[a.Category].Envelopes[a.Envelope].Model.ID
err := tx.Create(&allocation).Error
if err != nil {
tx.Rollback()
return models.Budget{}, err
}
}
// Create MonthConfigs
for _, m := range resources.MonthConfigs {
mConfig := m.Model
mConfig.EnvelopeID = resources.Categories[m.Category].Envelopes[m.Envelope].Model.ID
err := tx.Create(&mConfig).Error
if err != nil {
tx.Rollback()
return models.Budget{}, err
}
}
// No errors happened, commit the transaction
tx.Commit()
return budget, nil
}