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class.go
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class.go
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package models
import (
"fmt"
"strconv"
"strings"
)
type Class uint8
const (
AllClasses ClassMask = 0xFFFFFFFFFFFFFFFF
)
// Load with info from game database on startup
var ClassNames = map[Class]string{}
func (r Class) String() string {
n, ok := ClassNames[r]
if !ok {
return fmt.Sprintf("unknown class ID: %d", r)
}
return n
}
type ClassMask uint64
func (c *ClassMask) All() bool {
return *c == AllClasses
}
func (c *ClassMask) EncodeWord() (string, error) {
if c.All() {
return "All", nil
}
var enables []string
for class := Class(1); class < 64; class++ {
if c.Has(class) {
enables = append(enables, fmt.Sprintf("%d", class))
}
}
return strings.Join(enables, "|"), nil
}
func (c *ClassMask) DecodeWord(data string) error {
if data == "All" {
*c = AllClasses
return nil
}
enables := strings.Split(data, "|")
for _, enable := range enables {
var class Class
u, err := strconv.ParseUint(enable, 10, 8)
if err != nil {
return err
}
class = Class(u)
c.Set(class, true)
}
return nil
}
func (c ClassMask) Has(class Class) bool {
if class == 0 {
panic("class cannot be zero")
}
return c&(1<<ClassMask(class-1)) != 0
}
func (c *ClassMask) Set(class Class, t bool) {
if class == 0 {
panic("class cannot be zero")
}
var flag ClassMask = 1 << ClassMask(class-1)
if t {
*c |= flag
} else {
*c &= ^flag
}
}