GraphQL API and utilities for the rpdata project
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package loader
import (
"context"
"errors"
"strings"
"git.aiterp.net/rpdata/api/model/channel"
"github.com/graph-gophers/dataloader"
)
// Channel gets a character by key
func (loader *Loader) Channel(key, value string) (channel.Channel, error) {
if !strings.HasPrefix(key, "Channel.") {
key = "Channel." + key
}
if loader.loaders[key] == nil {
return channel.Channel{}, errors.New("unsupported key")
}
loader.loadPrimed(key)
thunk := loader.loaders[key].Load(loader.ctx, dataloader.StringKey(value))
res, err := thunk()
if err != nil {
return channel.Channel{}, err
}
channel, ok := res.(channel.Channel)
if !ok {
return channel, errors.New("incorrect type")
}
return channel, nil
}
// PrimeChannels primes channels for loading along with the first one.
func (loader *Loader) PrimeChannels(key string, values ...string) {
if !strings.HasPrefix(key, "Channel.") {
key = "Channel." + key
}
loader.prime(key, values)
}
func channelNameBatch(ctx context.Context, keys dataloader.Keys) []*dataloader.Result {
var results []*dataloader.Result
names := keys.Keys()
channels, err := channel.ListNames(names...)
if err != nil {
for range names {
results = append(results, &dataloader.Result{Data: channel.Channel{}, Error: err})
}
return results
}
for _, name := range names {
found := false
for i := range channels {
if channels[i].Name == name {
results = append(results, &dataloader.Result{Data: channels[i]})
found = true
break
}
}
if !found {
results = append(results, &dataloader.Result{Data: channel.Channel{}, Error: err})
}
}
return results
}