mirror of
https://github.com/aclindsa/ofxgo.git
synced 2024-10-30 05:20:05 -04:00
387 lines
10 KiB
Go
387 lines
10 KiB
Go
package ofxgo
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import (
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"crypto/rand"
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"errors"
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"fmt"
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"github.com/aclindsa/xml"
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"golang.org/x/text/currency"
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"math/big"
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"regexp"
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"strconv"
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"strings"
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"time"
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)
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// Int provides helper methods to unmarshal int64 values from SGML/XML
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type Int int64
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// UnmarshalXML handles unmarshalling an Int from an SGML/XML string. Leading
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// and trailing whitespace is ignored.
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func (i *Int) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
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var value string
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err := d.DecodeElement(&value, &start)
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if err != nil {
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return err
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}
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value = strings.TrimSpace(value)
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i2, err := strconv.ParseInt(value, 10, 64)
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if err != nil {
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return err
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}
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*i = Int(i2)
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return nil
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}
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// Equal returns true if the two Ints are equal in value
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func (i Int) Equal(o Int) bool {
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return i == o
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}
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// Amount represents non-integer values (or at least values for fields that may
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// not necessarily be integers)
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type Amount struct {
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big.Rat
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}
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// UnmarshalXML handles unmarshalling an Amount from an SGML/XML string.
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// Leading and trailing whitespace is ignored.
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func (a *Amount) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
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var value string
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err := d.DecodeElement(&value, &start)
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if err != nil {
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return err
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}
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value = strings.TrimSpace(value)
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// The OFX spec allows the start of the fractional amount to be delineated
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// by a comma, so fix that up before attempting to parse it into big.Rat
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value = strings.Replace(value, ",", ".", 1)
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if _, ok := a.SetString(value); !ok {
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return errors.New("Failed to parse OFX amount")
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}
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return nil
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}
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// String prints a string representation of an Amount
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func (a Amount) String() string {
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return strings.TrimRight(strings.TrimRight(a.FloatString(100), "0"), ".")
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}
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// MarshalXML marshals an Amount to SGML/XML
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func (a Amount) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
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return e.EncodeElement(a.String(), start)
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}
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// Equal returns true if two Amounts are equal in value
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func (a Amount) Equal(o Amount) bool {
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return (&a).Cmp(&o.Rat) == 0
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}
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// Date represents OFX date/time values
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type Date struct {
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time.Time
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}
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var ofxDateFormats = []string{
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"20060102150405.000",
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"20060102150405",
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"200601021504",
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"2006010215",
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"20060102",
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}
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var ofxDateZoneRegex = regexp.MustCompile(`^([+-]?[0-9]+)(\.([0-9]{2}))?(:([A-Z]+))?$`)
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// UnmarshalXML handles unmarshalling a Date from an SGML/XML string. It
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// attempts to unmarshal the valid date formats in order of decreasing length
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// and defaults to GMT if a time zone is not provided, as per the OFX spec.
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// Leading and trailing whitespace is ignored.
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func (od *Date) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
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var value, zone, zoneFormat string
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err := d.DecodeElement(&value, &start)
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if err != nil {
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return err
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}
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value = strings.SplitN(value, "]", 2)[0]
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value = strings.TrimSpace(value)
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// Split the time zone off, if any
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split := strings.SplitN(value, "[", 2)
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if len(split) == 2 {
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value = split[0]
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zoneFormat = " -0700"
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zone = strings.TrimRight(split[1], "]")
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matches := ofxDateZoneRegex.FindStringSubmatch(zone)
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if matches == nil {
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return errors.New("Invalid OFX Date timezone format: " + zone)
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}
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var err error
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var zonehours, zoneminutes int
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zonehours, err = strconv.Atoi(matches[1])
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if err != nil {
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return err
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}
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if len(matches[3]) > 0 {
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zoneminutes, err = strconv.Atoi(matches[3])
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if err != nil {
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return err
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}
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zoneminutes = zoneminutes * 60 / 100
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}
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zone = fmt.Sprintf(" %+03d%02d", zonehours, zoneminutes)
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// Get the time zone name if it's there, default to GMT if the offset
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// is 0 and a name isn't supplied
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if len(matches[5]) > 0 {
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zone = zone + " " + matches[5]
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zoneFormat = zoneFormat + " MST"
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} else if zonehours == 0 && zoneminutes == 0 {
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zone = zone + " GMT"
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zoneFormat = zoneFormat + " MST"
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}
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} else {
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// Default to GMT if no time zone was specified
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zone = " +0000 GMT"
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zoneFormat = " -0700 MST"
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}
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// Try all the date formats, from longest to shortest
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for _, format := range ofxDateFormats {
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t, err := time.Parse(format+zoneFormat, value+zone)
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if err == nil {
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od.Time = t
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return nil
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}
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}
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return errors.New("OFX: Couldn't parse date:" + value)
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}
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// String returns a string representation of the Date abiding by the OFX spec
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func (od Date) String() string {
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format := od.Format(ofxDateFormats[0])
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zonename, zoneoffset := od.Zone()
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if zoneoffset < 0 {
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format += "[" + fmt.Sprintf("%+d", zoneoffset/3600)
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} else {
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format += "[" + fmt.Sprintf("%d", zoneoffset/3600)
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}
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fractionaloffset := (zoneoffset % 3600) / 36
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if fractionaloffset > 0 {
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format += "." + fmt.Sprintf("%02d", fractionaloffset)
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} else if fractionaloffset < 0 {
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format += "." + fmt.Sprintf("%02d", -fractionaloffset)
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}
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if len(zonename) > 0 {
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return format + ":" + zonename + "]"
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}
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return format + "]"
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}
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// MarshalXML marshals a Date to XML
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func (od Date) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
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return e.EncodeElement(od.String(), start)
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}
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// Equal returns true if the two Dates represent the same time (time zones are
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// accounted for when comparing, but are not required to match)
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func (od Date) Equal(o Date) bool {
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return od.Time.Equal(o.Time)
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}
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// NewDate returns a new Date object with the provided date, time, and timezone
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func NewDate(year int, month time.Month, day, hour, min, sec, nsec int, loc *time.Location) *Date {
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return &Date{Time: time.Date(year, month, day, hour, min, sec, nsec, loc)}
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}
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var gmt = time.FixedZone("GMT", 0)
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// NewDateGMT returns a new Date object with the provided date and time in the
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// GMT timezone
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func NewDateGMT(year int, month time.Month, day, hour, min, sec, nsec int) *Date {
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return &Date{Time: time.Date(year, month, day, hour, min, sec, nsec, gmt)}
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}
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// String provides helper methods to unmarshal OFX string values from SGML/XML
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type String string
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// UnmarshalXML handles unmarshalling a String from an SGML/XML string. Leading
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// and trailing whitespace is ignored.
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func (os *String) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
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var value string
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err := d.DecodeElement(&value, &start)
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if err != nil {
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return err
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}
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*os = String(strings.TrimSpace(value))
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return nil
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}
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// String returns the string
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func (os *String) String() string {
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return string(*os)
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}
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// Equal returns true if the two Strings are equal in value
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func (os String) Equal(o String) bool {
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return os == o
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}
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// Boolean provides helper methods to unmarshal bool values from OFX SGML/XML
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type Boolean bool
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// UnmarshalXML handles unmarshalling a Boolean from an SGML/XML string.
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// Leading and trailing whitespace is ignored.
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func (ob *Boolean) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
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var value string
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err := d.DecodeElement(&value, &start)
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if err != nil {
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return err
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}
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tmpob := strings.TrimSpace(value)
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switch tmpob {
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case "Y":
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*ob = Boolean(true)
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case "N":
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*ob = Boolean(false)
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default:
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return errors.New("Invalid OFX Boolean")
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}
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return nil
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}
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// MarshalXML marshals a Boolean to XML
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func (ob Boolean) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
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if ob {
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return e.EncodeElement("Y", start)
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}
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return e.EncodeElement("N", start)
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}
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// String returns a string representation of a Boolean value
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func (ob *Boolean) String() string {
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return fmt.Sprintf("%v", *ob)
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}
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// Equal returns true if the two Booleans are the same
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func (ob Boolean) Equal(o Boolean) bool {
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return ob == o
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}
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// UID represents an UID according to the OFX spec
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type UID string
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// UnmarshalXML handles unmarshalling an UID from an SGML/XML string. Leading
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// and trailing whitespace is ignored.
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func (ou *UID) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
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var value string
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err := d.DecodeElement(&value, &start)
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if err != nil {
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return err
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}
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*ou = UID(strings.TrimSpace(value))
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return nil
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}
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// RecommendedFormat returns true iff this UID meets the OFX specification's
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// recommendation that UIDs follow the standard UUID 36-character format
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func (ou UID) RecommendedFormat() (bool, error) {
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if len(ou) != 36 {
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return false, errors.New("UID not 36 characters long")
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}
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if ou[8] != '-' || ou[13] != '-' || ou[18] != '-' || ou[23] != '-' {
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return false, errors.New("UID missing hyphens at the appropriate places")
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}
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return true, nil
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}
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// Valid returns true, nil if the UID is valid. This is less strict than
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// RecommendedFormat, and will always return true, nil if it does.
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func (ou UID) Valid() (bool, error) {
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if len(ou) == 0 || len(ou) > 36 {
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return false, errors.New("UID invalid length")
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}
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return true, nil
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}
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// Equal returns true if the two UIDs are the same
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func (ou UID) Equal(o UID) bool {
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return ou == o
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}
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// RandomUID creates a new randomly-generated UID
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func RandomUID() (*UID, error) {
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uidbytes := make([]byte, 16)
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n, err := rand.Read(uidbytes[:])
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if err != nil {
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return nil, err
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}
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if n != 16 {
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return nil, errors.New("RandomUID failed to read 16 random bytes")
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}
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uid := UID(fmt.Sprintf("%08x-%04x-%04x-%04x-%012x", uidbytes[:4], uidbytes[4:6], uidbytes[6:8], uidbytes[8:10], uidbytes[10:]))
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return &uid, nil
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}
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// CurrSymbol represents an ISO-4217 currency
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type CurrSymbol struct {
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currency.Unit
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}
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// UnmarshalXML handles unmarshalling a CurrSymbol from an SGML/XML string.
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// Leading and trailing whitespace is ignored.
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func (c *CurrSymbol) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
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var value string
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err := d.DecodeElement(&value, &start)
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if err != nil {
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return err
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}
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value = strings.TrimSpace(value)
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unit, err := currency.ParseISO(value)
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if err != nil {
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return errors.New("Error parsing CurrSymbol:" + err.Error())
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}
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c.Unit = unit
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return nil
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}
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// MarshalXML marshals a CurrSymbol to SGML/XML
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func (c CurrSymbol) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
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return e.EncodeElement(c.String(), start)
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}
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// Equal returns true if the two Currencies are the same
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func (c CurrSymbol) Equal(o CurrSymbol) bool {
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return c.String() == o.String()
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}
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// Valid returns true, nil if the CurrSymbol is valid.
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func (c CurrSymbol) Valid() (bool, error) {
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if c.String() == "XXX" {
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return false, fmt.Errorf("Invalid CurrSymbol: %s", c.Unit)
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}
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return true, nil
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}
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// NewCurrSymbol returns a new CurrSymbol given a three-letter ISO-4217
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// currency symbol as a string
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func NewCurrSymbol(s string) (*CurrSymbol, error) {
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unit, err := currency.ParseISO(s)
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if err != nil {
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return nil, errors.New("Error parsing string to create new CurrSymbol:" + err.Error())
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}
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return &CurrSymbol{unit}, nil
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}
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