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|
package dbx
import (
"database/sql"
"slices"
)
type MintageData struct {
Standard []MSRow
Commemorative []MCRow
}
type msRowInternal struct {
Country string
Type MintageType
Year int
Denomination float64
Mintmark sql.Null[string]
Mintage sql.Null[int]
Reference sql.Null[string]
}
type mcRowInternal struct {
Country string
Type MintageType
Year int
Name string
Number int
Mintmark sql.Null[string]
Mintage sql.Null[int]
Reference sql.Null[string]
}
type MSRow struct {
Year int
Mintmark string
Mintages [ndenoms]int
References []string
}
type MCRow struct {
Year int
Name string
Number int
Mintmark string
Mintage int
Reference string
}
type MintageType int
/* DO NOT REORDER! */
const (
TypeCirc MintageType = iota
TypeNifc
TypeProof
)
/* DO NOT REORDER! */
const (
MintageUnknown = -iota - 1
MintageInvalid
)
const ndenoms = 8
func NewMintageType(s string) MintageType {
switch s {
case "circ":
return TypeCirc
case "nifc":
return TypeNifc
case "proof":
return TypeProof
}
/* TODO: Handle this */
panic("TODO")
}
func GetMintages(country string, typ MintageType) (MintageData, error) {
var (
zero MintageData
xs []MSRow
ys []MCRow
)
rs, err := db.Queryx(`
SELECT * FROM mintages_s
WHERE country = ? AND type = ?
ORDER BY year, mintmark, denomination
`, country, typ)
if err != nil {
return zero, err
}
for rs.Next() {
var x msRowInternal
if err = rs.StructScan(&x); err != nil {
return zero, err
}
loop:
msr := MSRow{
Year: x.Year,
Mintmark: sqlOr(x.Mintmark, ""),
References: make([]string, 0, ndenoms),
}
for i := range msr.Mintages {
msr.Mintages[i] = MintageUnknown
}
msr.Mintages[denomToIdx(x.Denomination)] =
sqlOr(x.Mintage, MintageUnknown)
if x.Reference.Valid {
msr.References = append(msr.References, x.Reference.V)
}
for rs.Next() {
var y msRowInternal
if err = rs.StructScan(&y); err != nil {
return zero, err
}
if x.Year != y.Year || x.Mintmark != y.Mintmark {
x = y
xs = append(xs, msr)
goto loop
}
msr.Mintages[denomToIdx(y.Denomination)] =
sqlOr(y.Mintage, MintageUnknown)
if y.Reference.Valid {
msr.References = append(msr.References, y.Reference.V)
}
}
xs = append(xs, msr)
}
if err = rs.Err(); err != nil {
return zero, err
}
rs, err = db.Queryx(`
SELECT * FROM mintages_c
WHERE country = ? AND type = ?
ORDER BY year, mintmark, number
`, country, typ)
if err != nil {
return zero, err
}
for rs.Next() {
var y mcRowInternal
if err = rs.StructScan(&y); err != nil {
return zero, err
}
ys = append(ys, MCRow{
Year: y.Year,
Name: y.Name,
Number: y.Number,
Mintmark: sqlOr(y.Mintmark, ""),
Mintage: sqlOr(y.Mintage, MintageUnknown),
Reference: sqlOr(y.Reference, ""),
})
}
return MintageData{xs, ys}, rs.Err()
}
func sqlOr[T any](v sql.Null[T], dflt T) T {
if v.Valid {
return v.V
}
return dflt
}
func denomToIdx(d float64) int {
return slices.Index([]float64{
0.01, 0.02, 0.05, 0.10,
0.20, 0.50, 1.00, 2.00,
}, d)
}
|
