package main import ( "encoding/xml" "errors" "fmt" "io" "log" "math" "math/big" "net/http" "time" ) type GnucashXMLCommodity struct { Name string `xml:"http://www.gnucash.org/XML/cmdty id"` Description string `xml:"http://www.gnucash.org/XML/cmdty name"` Type string `xml:"http://www.gnucash.org/XML/cmdty space"` Fraction int `xml:"http://www.gnucash.org/XML/cmdty fraction"` XCode string `xml:"http://www.gnucash.org/XML/cmdty xcode"` } type GnucashCommodity struct{ Security } func (gc *GnucashCommodity) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error { var gxc GnucashXMLCommodity if err := d.DecodeElement(&gxc, &start); err != nil { return err } gc.Name = gxc.Name gc.Symbol = gxc.Name gc.Description = gxc.Description gc.AlternateId = gxc.XCode gc.Security.Type = Stock // assumed default if gxc.Type == "ISO4217" { gc.Security.Type = Currency // Get the number from our templates for the AlternateId because // Gnucash uses 'id' (our Name) to supply the string ISO4217 code template := FindSecurityTemplate(gxc.Name, Currency) if template == nil { return errors.New("Unable to find security template for Gnucash ISO4217 commodity") } gc.AlternateId = template.AlternateId gc.Precision = template.Precision } else { if gxc.Fraction > 0 { gc.Precision = int(math.Ceil(math.Log10(float64(gxc.Fraction)))) } else { gc.Precision = 0 } } return nil } type GnucashTime struct{ time.Time } func (g *GnucashTime) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error { var s string if err := d.DecodeElement(&s, &start); err != nil { return fmt.Errorf("date should be a string") } t, err := time.Parse("2006-01-02 15:04:05 -0700", s) g.Time = t return err } type GnucashDate struct { Date GnucashTime `xml:"http://www.gnucash.org/XML/ts date"` } type GnucashAccount struct { Version string `xml:"version,attr"` accountid int64 // Used to map Gnucash guid's to integer ones AccountId string `xml:"http://www.gnucash.org/XML/act id"` ParentAccountId string `xml:"http://www.gnucash.org/XML/act parent"` Name string `xml:"http://www.gnucash.org/XML/act name"` Description string `xml:"http://www.gnucash.org/XML/act description"` Type string `xml:"http://www.gnucash.org/XML/act type"` Commodity GnucashXMLCommodity `xml:"http://www.gnucash.org/XML/act commodity"` } type GnucashTransaction struct { TransactionId string `xml:"http://www.gnucash.org/XML/trn id"` Description string `xml:"http://www.gnucash.org/XML/trn description"` DatePosted GnucashDate `xml:"http://www.gnucash.org/XML/trn date-posted"` DateEntered GnucashDate `xml:"http://www.gnucash.org/XML/trn date-entered"` Commodity GnucashXMLCommodity `xml:"http://www.gnucash.org/XML/trn currency"` Splits []GnucashSplit `xml:"http://www.gnucash.org/XML/trn splits>split"` } type GnucashSplit struct { SplitId string `xml:"http://www.gnucash.org/XML/split id"` AccountId string `xml:"http://www.gnucash.org/XML/split account"` Memo string `xml:"http://www.gnucash.org/XML/split memo"` Amount string `xml:"http://www.gnucash.org/XML/split quantity"` Value string `xml:"http://www.gnucash.org/XML/split value"` } type GnucashXMLImport struct { XMLName xml.Name `xml:"gnc-v2"` Commodities []GnucashCommodity `xml:"http://www.gnucash.org/XML/gnc book>commodity"` Accounts []GnucashAccount `xml:"http://www.gnucash.org/XML/gnc book>account"` Transactions []GnucashTransaction `xml:"http://www.gnucash.org/XML/gnc book>transaction"` } type GnucashImport struct { Securities []Security Accounts []Account Transactions []Transaction } func ImportGnucash(r io.Reader) (*GnucashImport, error) { var gncxml GnucashXMLImport var gncimport GnucashImport // Perform initial parsing of xml into structs decoder := xml.NewDecoder(r) err := decoder.Decode(&gncxml) if err != nil { return nil, err } // Fixup securities, making a map of them as we go securityMap := make(map[string]Security) for i := range gncxml.Commodities { s := gncxml.Commodities[i].Security s.SecurityId = int64(i + 1) securityMap[s.Name] = s // Ignore gnucash's "template" commodity if s.Name != "template" || s.Description != "template" || s.AlternateId != "template" { gncimport.Securities = append(gncimport.Securities, s) } } //find root account, while simultaneously creating map of GUID's to //accounts var rootAccount GnucashAccount accountMap := make(map[string]GnucashAccount) for i := range gncxml.Accounts { gncxml.Accounts[i].accountid = int64(i + 1) if gncxml.Accounts[i].Type == "ROOT" { rootAccount = gncxml.Accounts[i] } else { accountMap[gncxml.Accounts[i].AccountId] = gncxml.Accounts[i] } } //Translate to our account format, figuring out parent relationships for guid := range accountMap { ga := accountMap[guid] var a Account a.AccountId = ga.accountid if ga.ParentAccountId == rootAccount.AccountId { a.ParentAccountId = -1 } else { parent, ok := accountMap[ga.ParentAccountId] if ok { a.ParentAccountId = parent.accountid } else { a.ParentAccountId = -1 // Ugly, but assign to top-level if we can't find its parent } } a.Name = ga.Name if security, ok := securityMap[ga.Commodity.Name]; ok { a.SecurityId = security.SecurityId } else { return nil, fmt.Errorf("Unable to find security: %s", ga.Commodity.Name) } //TODO find account types switch ga.Type { default: a.Type = Bank case "ASSET": a.Type = Asset case "BANK": a.Type = Bank case "CASH": a.Type = Cash case "CREDIT", "LIABILITY": a.Type = Liability case "EQUITY": a.Type = Equity case "EXPENSE": a.Type = Expense case "INCOME": a.Type = Income case "PAYABLE": a.Type = Payable case "RECEIVABLE": a.Type = Receivable case "MUTUAL", "STOCK": a.Type = Investment case "TRADING": a.Type = Trading } gncimport.Accounts = append(gncimport.Accounts, a) } //Translate transactions to our format for i := range gncxml.Transactions { gt := gncxml.Transactions[i] t := new(Transaction) t.Description = gt.Description t.Date = gt.DatePosted.Date.Time t.Status = Imported for j := range gt.Splits { gs := gt.Splits[j] s := new(Split) s.Memo = gs.Memo account, ok := accountMap[gs.AccountId] if !ok { return nil, fmt.Errorf("Unable to find account: %s", gs.AccountId) } s.AccountId = account.accountid security, ok := securityMap[account.Commodity.Name] if !ok { return nil, fmt.Errorf("Unable to find security: %s", account.Commodity.Name) } s.SecurityId = -1 var r big.Rat _, ok = r.SetString(gs.Amount) if ok { s.Amount = r.FloatString(security.Precision) } else { return nil, fmt.Errorf("Can't set split Amount: %s", gs.Amount) } t.Splits = append(t.Splits, s) } gncimport.Transactions = append(gncimport.Transactions, *t) } return &gncimport, nil } func GnucashImportHandler(w http.ResponseWriter, r *http.Request) { user, err := GetUserFromSession(r) if err != nil { WriteError(w, 1 /*Not Signed In*/) return } if r.Method != "POST" { WriteError(w, 3 /*Invalid Request*/) return } multipartReader, err := r.MultipartReader() if err != nil { WriteError(w, 3 /*Invalid Request*/) return } // Assume there is only one 'part' and it's the one we care about part, err := multipartReader.NextPart() if err != nil { if err == io.EOF { WriteError(w, 3 /*Invalid Request*/) } else { WriteError(w, 999 /*Internal Error*/) log.Print(err) } return } gnucashImport, err := ImportGnucash(part) if err != nil { WriteError(w, 3 /*Invalid Request*/) return } sqltransaction, err := DB.Begin() if err != nil { WriteError(w, 999 /*Internal Error*/) log.Print(err) return } // Import securities, building map from Gnucash security IDs to our // internal IDs securityMap := make(map[int64]int64) for _, security := range gnucashImport.Securities { securityId := security.SecurityId // save off because it could be updated s, err := ImportGetCreateSecurity(sqltransaction, user, &security) if err != nil { sqltransaction.Rollback() WriteError(w, 6 /*Import Error*/) log.Print(err) log.Print(security) return } securityMap[securityId] = s.SecurityId } // Get/create accounts in the database, building a map from Gnucash account // IDs to our internal IDs as we go accountMap := make(map[int64]int64) accountsRemaining := len(gnucashImport.Accounts) accountsRemainingLast := accountsRemaining for accountsRemaining > 0 { for _, account := range gnucashImport.Accounts { // If the account has already been added to the map, skip it _, ok := accountMap[account.AccountId] if ok { continue } // If it hasn't been added, but its parent has, add it to the map _, ok = accountMap[account.ParentAccountId] if ok || account.ParentAccountId == -1 { account.UserId = user.UserId if account.ParentAccountId != -1 { account.ParentAccountId = accountMap[account.ParentAccountId] } account.SecurityId = securityMap[account.SecurityId] a, err := GetCreateAccountTx(sqltransaction, account) if err != nil { sqltransaction.Rollback() WriteError(w, 999 /*Internal Error*/) log.Print(err) return } accountMap[account.AccountId] = a.AccountId accountsRemaining-- } } if accountsRemaining == accountsRemainingLast { //We didn't make any progress in importing the next level of accounts, so there must be a circular parent-child relationship, so give up and tell the user they're wrong sqltransaction.Rollback() WriteError(w, 999 /*Internal Error*/) log.Print(fmt.Errorf("Circular account parent-child relationship when importing %s", part.FileName())) return } accountsRemainingLast = accountsRemaining } // Insert transactions, fixing up account IDs to match internal ones from // above for _, transaction := range gnucashImport.Transactions { for _, split := range transaction.Splits { acctId, ok := accountMap[split.AccountId] if !ok { sqltransaction.Rollback() WriteError(w, 999 /*Internal Error*/) log.Print(fmt.Errorf("Error: Split's AccountID Doesn't exist: %d\n", split.AccountId)) return } split.AccountId = acctId } err := InsertTransactionTx(sqltransaction, &transaction, user) if err != nil { sqltransaction.Rollback() WriteError(w, 999 /*Internal Error*/) log.Print(err) return } } err = sqltransaction.Commit() if err != nil { sqltransaction.Rollback() WriteError(w, 999 /*Internal Error*/) log.Print(err) return } WriteSuccess(w) }