69 lines
1.3 KiB
Go
69 lines
1.3 KiB
Go
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package loaders
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import (
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"encoding/json"
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"os"
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)
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/*
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This is a simple database system that peforms CRUD operations on a JSON file.
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It will be a proper database system in the future, but for now it will be a JSON file.
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Hope this is understandable for future coders.
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*/
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type DataLoader interface {
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Read(filename string) (interface{}, error)
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Write(filename string, data interface{}) error
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}
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type JSON struct{}
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func (l *JSON) Read(filename string) (interface{}, error) {
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file, err := os.Open(filename)
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if err != nil {
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return nil, err
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}
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defer file.Close()
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bytes, err := os.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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data := make(map[string]interface{})
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err = json.Unmarshal(bytes, &data)
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if err != nil {
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return nil, err
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}
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return data, nil
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}
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func (l *JSON) Write(filename string, data interface{}) error {
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existingData, err := l.Read(filename)
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if err != nil {
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return err
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}
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newData := data.(map[string]interface{})
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for k, v := range existingData.(map[string]interface{}) {
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if newV, ok := newData[k]; ok {
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newData[k] = newV
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} else {
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newData[k] = v
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}
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}
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bytes, err := json.MarshalIndent(newData, "", " ")
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if err != nil {
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return err
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}
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err = os.WriteFile(filename, bytes, 0644)
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if err != nil {
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return err
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}
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return nil
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}
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