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format.go
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format.go
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package main
import (
"fmt"
"io"
)
type formatConfig struct {
w io.Writer
packageName string
variableName string
tjPrefix string
tjPackage string
}
func formatObject(fcfg formatConfig, obj map[string]interface{}) {
if len(obj) == 0 {
fmt.Fprintf(fcfg.w, "%s.O{}", fcfg.tjPrefix)
return
}
fmt.Fprintf(fcfg.w, "%s.O{\n", fcfg.tjPrefix)
for k, v := range obj {
fmt.Fprintf(fcfg.w, "%q:", k)
format(fcfg, v)
fmt.Fprintf(fcfg.w, ",\n")
}
fmt.Fprintf(fcfg.w, "}")
}
func formatArray(fcfg formatConfig, arr []interface{}) {
if len(arr) == 0 {
fmt.Fprintf(fcfg.w, "%s.A{}", fcfg.tjPrefix)
return
}
if len(arr) == 1 {
fmt.Fprintf(fcfg.w, "%s.A{", fcfg.tjPrefix)
format(fcfg, arr[0])
fmt.Fprintf(fcfg.w, "}")
return
}
fmt.Fprintf(fcfg.w, "%s.A{\n", fcfg.tjPrefix)
for _, elem := range arr {
format(fcfg, elem)
fmt.Fprintf(fcfg.w, ",\n")
}
fmt.Fprintf(fcfg.w, "}")
}
func format(fcfg formatConfig, data interface{}) {
switch v := data.(type) {
case nil:
fmt.Fprintf(fcfg.w, "null")
case bool:
fmt.Fprintf(fcfg.w, "%t", v)
case int:
fmt.Fprintf(fcfg.w, "%d", v)
case float64:
fmt.Fprintf(fcfg.w, "%g", v)
case string:
fmt.Fprintf(fcfg.w, "%q", v)
case []interface{}:
formatArray(fcfg, v)
case map[string]interface{}:
formatObject(fcfg, v)
default:
panic(fmt.Errorf("unexpected type in JSON deserialization of %v: %T", data, data))
}
}
func formatHeader(fcfg formatConfig) {
if fcfg.packageName != "" {
fmt.Fprintf(fcfg.w, "package %s\n\n", fcfg.packageName)
if fcfg.tjPrefix != "tj" {
fmt.Fprintf(fcfg.w, "import %s \"%s\"\n\n", fcfg.tjPrefix, fcfg.tjPackage)
} else {
fmt.Fprintf(fcfg.w, "import \"%s\"\n\n", fcfg.tjPackage)
}
}
if fcfg.variableName != "" {
fmt.Fprintf(fcfg.w, "var %s = ", fcfg.variableName)
}
}