109 lines
2.4 KiB
Go
109 lines
2.4 KiB
Go
package config
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import (
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"encoding/json"
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"errors"
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"git.xdrm.io/go/aicra/driver"
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"os"
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"path/filepath"
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"strings"
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)
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// Parse extracts a Meta from a json config file (aicra.json)
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func Parse(_path string) (*Schema, error) {
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/* 1. ppen file */
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file, err := os.Open(_path)
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if err != nil {
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return nil, errors.New("cannot open file")
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}
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defer file.Close()
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/* 2. Init receiver dataset */
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receiver := &Schema{}
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/* 3. Decode json */
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decoder := json.NewDecoder(file)
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err = decoder.Decode(receiver)
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if err != nil {
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return nil, err
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}
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/* 4. Error on invalid driver */
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receiver.DriverName = strings.ToLower(receiver.DriverName)
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switch receiver.DriverName {
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case "generic":
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receiver.Driver = &driver.Generic{}
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case "plugin":
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receiver.Driver = &driver.Plugin{}
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default:
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return nil, errors.New("invalid driver; choose from 'generic', 'plugin'")
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}
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/* 5. Fail on absolute folders */
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if len(receiver.Types.Folder) > 0 && filepath.IsAbs(receiver.Types.Folder) {
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return nil, errors.New("types folder must be relative to root")
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}
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if len(receiver.Controllers.Folder) > 0 && filepath.IsAbs(receiver.Controllers.Folder) {
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return nil, errors.New("controllers folder must be relative to root")
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}
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if len(receiver.Middlewares.Folder) > 0 && filepath.IsAbs(receiver.Middlewares.Folder) {
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return nil, errors.New("middlewares folder must be relative to root")
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}
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/* 7. Format result (default values, etc) */
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receiver.setDefaults()
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return receiver, nil
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}
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// setDefaults sets defaults values and checks for missing data
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func (m *Schema) setDefaults() {
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// 1. extract absolute root folder
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absroot, err := filepath.Abs(m.Root)
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if err == nil {
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m.Root = absroot
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}
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// 2. host
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if len(m.Host) < 1 {
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m.Host = Default.Host
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}
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// 3. port
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if m.Port == 0 {
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m.Port = Default.Port
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}
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// 4. Use default builders if not set
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if m.Types == nil {
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m.Types = Default.Types
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}
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if m.Controllers == nil {
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m.Controllers = Default.Controllers
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}
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if m.Middlewares == nil {
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m.Middlewares = Default.Middlewares
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}
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// 5. Use default folders if not set
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if m.Types.Folder == "" {
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m.Types.Folder = Default.Types.Folder
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}
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if m.Controllers.Folder == "" {
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m.Controllers.Folder = Default.Controllers.Folder
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}
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if m.Middlewares.Folder == "" {
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m.Middlewares.Folder = Default.Middlewares.Folder
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}
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// 6. Infer Maps from Folders
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m.Types.InferFromFolder(m.Root, m.Driver)
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m.Controllers.InferFromFolder(m.Root, m.Driver)
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m.Middlewares.InferFromFolder(m.Root, m.Driver)
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}
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