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DataStorage.attach   A
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↳ Parent: DataStorage

Complexity

Conditions 1

Size

Total Lines 7
Code Lines 7

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 4
CRAP Score 1

Importance

Changes 0
Metric Value
eloc 7
dl 0
loc 7
ccs 4
cts 4
cp 1
rs 10
c 0
b 0
f 0
cc 1
crap 1
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import {ObserverAdapter, OnChangeCallback} from '@enbock/state-value-observer/ValueObserver';
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import StorageAdapter from './StorageAdapter';
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export interface AdapterDictionary {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  [index: string]: StorageAdapter<any>

            


            
                                                                                                            
                            
            
                                    
            
            

                
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}

            


            
                                                                                                            
                            
            
                                    
            
            

                
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export default class DataStorage {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  protected domain: string;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  protected storage: Storage;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  protected adapters: AdapterDictionary;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  constructor(domain: string, storage: Storage) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    this.domain = domain;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    this.storage = storage;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    this.adapters = {};

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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  }

            


            
                                                                        
                            
            
                                    
            
            

                
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  attach<Type>(key: string, adapter: ObserverAdapter<Type>): StorageAdapter<Type> {

            


            
                                                                        
                            
            
                                    
            
            

                
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    const callback: OnChangeCallback<Type> = (newValue: Type) => this.updateStorage(key, newValue);

            


            
                                                                        
                            
            
                                    
            
            

                
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    const storageAdapter: StorageAdapter<Type> = new StorageAdapter<Type>(adapter, callback);

            


            
                                                                        
                            
            
                                    
            
            

                
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    this.adapters[key] = storageAdapter;

            


            
                                                                        
                            
            
                                    
            
            

                
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    return storageAdapter;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  loadData<Type>(key: string, initialValue: Type): Type {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    const serializedJsonData: string | null = this.storage.getItem(this.domain + '::' + key);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    let data: Type = initialValue;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    if (serializedJsonData != null) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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      data = JSON.parse(serializedJsonData) as Type;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    return data;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  protected updateStorage<Type>(key: string, newValue: Type) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    this.storage.setItem(this.domain + '::' + key, JSON.stringify(newValue));

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  }

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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