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template.go
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template.go
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package resource
import (
"fmt"
"github.com/errordeveloper/kubeplay/rubykube/converter"
mruby "github.com/mitchellh/go-mruby"
)
// template type RubyKubeClass(classNameString, instanceVariableName, instanceVariableType)
type classNameString string
type instanceVariableName int
type instanceVariableType int
type RubyKubeClass struct {
class *mruby.Class
objects []RubyKubeClassInstance
rk *RubyKube
}
type RubyKubeClassInstance struct {
self *mruby.MrbValue
vars *RubyKubeClassInstanceVars
}
type RubyKubeClassInstanceVars struct {
instanceVariableName instanceVariableType
}
func NewRubyKubeClass(rk *RubyKube) *RubyKubeClass {
c := &RubyKubeClass{objects: []RubyKubeClassInstance{}, rk: rk}
c.class = DefineRubyKubeClass(rk, c)
return c
}
func DefineRubyKubeClass(rk *RubyKube, c *RubyKubeClass) *mruby.Class {
// common methods
return rk.defineClass(classNameString, map[string]methodDefintion{
"to_ruby": {
mruby.ArgsReq(0), func(m *mruby.Mrb, self *mruby.MrbValue) (mruby.Value, mruby.Value) {
vars, err := c.LookupVars(self)
if err != nil {
return nil, createException(m, err.Error())
}
rbconv := converter.New(m)
if err := rbconv.Convert(vars.instanceVariableName); err != nil {
return nil, createException(m, err.Error())
}
return rbconv.Value(), nil
},
instanceMethod,
},
"to_json": {
mruby.ArgsReq(0), func(m *mruby.Mrb, self *mruby.MrbValue) (mruby.Value, mruby.Value) {
vars, err := c.LookupVars(self)
if err != nil {
return nil, createException(m, err.Error())
}
return marshalToJSON(vars.instanceVariableName, m)
},
instanceMethod,
},
"object_count": {
mruby.ArgsNone(), func(m *mruby.Mrb, self *mruby.MrbValue) (mruby.Value, mruby.Value) {
return m.FixnumValue(len(c.objects)), nil
},
classMethod,
},
})
}
func (c *RubyKubeClass) New() (*RubyKubeClassInstance, error) {
s, err := c.class.New()
if err != nil {
return nil, err
}
o := RubyKubeClassInstance{
self: s,
vars: &RubyKubeClassInstanceVars{
instanceVariableType{},
},
}
c.objects = append(c.objects, o)
return &o, nil
}
func (c *RubyKubeClass) LookupVars(this *mruby.MrbValue) (*RubyKubeClassInstanceVars, error) {
for _, that := range c.objects {
if *this == *that.self {
return that.vars, nil
}
}
return nil, fmt.Errorf("%s: could not find class instance", classNameString)
}