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forgedl.go
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forgedl.go
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/*
Copyright 2019 Padduck, LLC
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package forgedl
import (
"encoding/json"
"errors"
"github.com/pufferpanel/pufferpanel/v3"
"path"
"strings"
)
const InstallerUrl = "https://maven.minecraftforge.net/net/minecraftforge/forge/${version}/forge-${version}-installer.jar"
const PromoUrl = "https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json"
type ForgeDl struct {
Version string
Filename string
MinecraftVersion string
OutputVariable string
}
func (op ForgeDl) Run(env pufferpanel.Environment) pufferpanel.OperationResult {
if op.Version == "" {
version, err := getLatestForMCVersion(op.MinecraftVersion)
if err != nil {
return pufferpanel.OperationResult{Error: err}
}
op.Version = op.MinecraftVersion + "-" + version
}
jarDownload := strings.Replace(InstallerUrl, "${version}", op.Version, -1)
localFile, err := pufferpanel.DownloadViaMaven(jarDownload, env)
if err != nil {
return pufferpanel.OperationResult{Error: err}
}
//copy from the cache
err = pufferpanel.CopyFile(localFile, path.Join(env.GetRootDirectory(), op.Filename))
if err != nil {
return pufferpanel.OperationResult{Error: err}
}
return pufferpanel.OperationResult{VariableOverrides: map[string]interface{}{
op.OutputVariable: op.Version,
}}
}
func getLatestForMCVersion(minecraftVersion string) (string, error) {
response, err := pufferpanel.HttpGet(PromoUrl)
defer pufferpanel.CloseResponse(response)
if err != nil {
return "", err
}
var promos ForgePromos
err = json.NewDecoder(response.Body).Decode(&promos)
if err != nil {
return "", err
}
version := promos.VersionMap[minecraftVersion+"-latest"]
if version == "" {
return "", errors.New("no forge available for mc version")
}
return version, nil
}
type ForgePromos struct {
Homepage string `json:"homepage"`
VersionMap map[string]string `json:"promos"`
}