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validate.go
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validate.go
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package akasar
import (
"errors"
"fmt"
"reflect"
"slices"
"unicode"
"github.com/kanengo/akasar/internal/reflection"
"github.com/kanengo/akasar/runtime/codegen"
)
func validateRegistrations(regs []*codegen.Registration) error {
intfs := map[reflect.Type]struct{}{}
for _, reg := range regs {
intfs[reg.Iface] = struct{}{}
}
var errs []error
for _, reg := range regs {
for i := 0; i < reg.Impl.NumField(); i++ {
f := reg.Impl.Field(i)
switch {
case f.Type.Implements(reflection.Type[interface{ isRef() }]()): //Ref[T]
v := f.Type.Field(0) //Ref[T]->T
if _, ok := intfs[v.Type]; !ok {
err := fmt.Errorf(
"component implementation struct %v has component reference field %v, but component %v was not registered; maybe you forgot to run 'akasar generate'",
reg.Impl, f.Type, v.Type,
)
errs = append(errs, err)
}
case f.Type == reflection.Type[Listener]():
name := f.Name
if tag, ok := f.Tag.Lookup("akasar"); ok {
if !isValidListenerName(tag) {
err := fmt.Errorf("component implementation struct %v has invalid listener tag %q", reg.Impl, tag)
errs = append(errs, err)
continue
}
name = tag
}
if !slices.Contains(reg.Listeners, name) {
err := fmt.Errorf("component implementation struct %v has a listener field %v, but listener %v hasn't been registered; maybe you forgot to run 'akasar generate'", reg.Impl, name, name)
errs = append(errs, err)
}
}
}
}
return errors.Join(errs...)
}
func isValidListenerName(name string) bool {
if name == "" {
return false
}
for i, c := range name {
if !unicode.IsLetter(c) && c != '_' && (i == 0 || !unicode.IsDigit(c)) {
return false
}
}
return true
}