61 lines
1.0 KiB
Go
61 lines
1.0 KiB
Go
// For more tutorials: https://blog.learngoprogramming.com
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//
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// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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package main
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import (
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"encoding/json"
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"reflect"
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)
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type decoder map[string]interface{}
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type schema struct {
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Category string
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Item json.RawMessage
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}
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func (d decoder) decode(data []byte) (list, error) {
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var schemas []schema
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if err := json.Unmarshal(data, &schemas); err != nil {
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return nil, err
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}
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return d.products(schemas)
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}
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func (d decoder) products(ss []schema) (list, error) {
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var store list
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for _, s := range ss {
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prod, err := d.product(s.Category, s.Item)
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if err != nil {
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return nil, err
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}
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store = append(store, prod)
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}
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return store, nil
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}
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func (d decoder) product(kind string, data []byte) (item, error) {
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p := d.newProduct(kind)
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err := json.Unmarshal(data, p)
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return p, err
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}
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func (d decoder) newProduct(kind string) item {
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t := reflect.TypeOf(d[kind])
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v := reflect.New(t)
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return v.Interface().(item)
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}
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