### File

`src/ngx-cache-layer.layer.ts`

### Extends

`Map`

### Index

###### Properties

- Public config
- Public items
- Public name

###### Methods

- Static createCacheParams
- get
- Public getItem
- getItemObservable
- Private initHook
- Private onExpire
- Private onExpireAll
- Public putItem
- Private putItemHook
- Public removeItem
- set

### Constructor

`constructor(layer: CacheLayerInterface)`
Defined in src/ngx-cache-layer.layer.ts:30

Parameters :

Name | Type | Optional | Description
layer | `CacheLayerInterface` |  |

### Methods

Static createCacheParams
`createCacheParams(config: )`
Defined in src/ngx-cache-layer.layer.ts:12

Parameters :

Name | Type | Optional | Description
config |  |  |

Returns : `void`

get
`get(name: )`
Defined in src/ngx-cache-layer.layer.ts:28

Parameters :

Name | Type | Optional | Description
name |  |  |

Returns : `any`

Public getItem
`getItem(key: string)`
Defined in src/ngx-cache-layer.layer.ts:58

Parameters :

Name | Type | Optional | Description
key | `string` |  |

Returns : `T`

getItemObservable
`getItemObservable(key: string)`
Defined in src/ngx-cache-layer.layer.ts:105

Parameters :

Name | Type | Optional | Description
key | `string` |  |

Returns : `Observable<>`

Private initHook
`initHook(layer: )`
Defined in src/ngx-cache-layer.layer.ts:46

Parameters :

Name | Type | Optional | Description
layer |  |  |

Returns : `void`

Private onExpire
`onExpire(key: string)`
Defined in src/ngx-cache-layer.layer.ts:83

Parameters :

Name | Type | Optional | Description
key | `string` |  |

Returns : `void`

Private onExpireAll
`onExpireAll(layer: )`
Defined in src/ngx-cache-layer.layer.ts:50

Parameters :

Name | Type | Optional | Description
layer |  |  |

Returns : `void`

Public putItem
`putItem(layerItem: T)`
Defined in src/ngx-cache-layer.layer.ts:66

Parameters :

Name | Type | Optional | Description
layerItem | `T` |  |

Returns : `T`

Private putItemHook
`putItemHook(layerItem: )`
Defined in src/ngx-cache-layer.layer.ts:54

Parameters :

Name | Type | Optional | Description
layerItem |  |  |

Returns : `void`

Public removeItem
`removeItem(key: string)`
Defined in src/ngx-cache-layer.layer.ts:91

Parameters :

Name | Type | Optional | Description
key | `string` |  |

Returns : `void`

set
`set(key: , data: )`
Defined in src/ngx-cache-layer.layer.ts:24

Parameters :

Name | Type | Optional | Description
key |  |  |
data |  |  |

Returns : `any`

### Properties

Public config
`config: `CacheServiceConfigInterface``
Type : `CacheServiceConfigInterface`
Defined in src/ngx-cache-layer.layer.ts:10

Public items
`items: `BehaviorSubject<Array>``
Type : `BehaviorSubject<Array>`
Defined in src/ngx-cache-layer.layer.ts:8

Public name
`name: `string``
Type : `string`
Defined in src/ngx-cache-layer.layer.ts:9

    import {CacheLayerInterface, CacheServiceConfigInterface} from './ngx-cache-layer.interfaces';
    import {BehaviorSubject} from 'rxjs/BehaviorSubject';
    import {Observable} from 'rxjs/Rx';
    import { Subscription } from 'rxjs/Subscription';

    export class CacheLayer<T> extends Map {

      public items: BehaviorSubject<Array<T>> = new BehaviorSubject([]);
      public name: string;
      public config: CacheServiceConfigInterface;

      static createCacheParams(config) {
          if(config.params.constructor === Object) {
            return // Todo
          } else if (config.constructor === String) {
            return // Todo
          } else if (config.params.constructor === Number) {
            return // Todo
          } else if (config.params.constructor === Array) {
            return // Todo
          }
      }

      set(key, data) {
        return super.set(key, data);
      }

      get(name) {
        return super.get(name)
      }

      constructor(layer: CacheLayerInterface) {
        super();
        this.name = layer.name;
        this.config = layer.config;
        if (this.config.localStorage) {
          layer.items.forEach(item => this.set(item['key'], item));
          if(layer.items.constructor === BehaviorSubject) {
            layer.items = layer.items.getValue() || [];
          }
          this.items.next([...this.items.getValue(), ...layer.items]);
        }
        this.initHook(layer);
      }

      private initHook(layer) {
        this.onExpireAll(layer)
      }

      private onExpireAll(layer) {
        layer.items.forEach(item => this.onExpire(item['key']))
      }

      private putItemHook(layerItem): void {
        this.onExpire(layerItem['key']);
      }

      public getItem(key: string): T {
        if (this.has(key)) {
          return this.get(key);
        } else {
          return null;
        }
      }

      public putItem(layerItem: T): T {
        this.set(layerItem['key'], layerItem);
        const item = this.get(layerItem['key']);
        const filteredItems = this.items.getValue().filter(item => item['key'] !== layerItem['key']);
        if (this.config.localStorage) {
          localStorage.setItem(this.name, JSON.stringify(<CacheLayerInterface>{
            config: this.config,
            name: this.name,
            items: [...filteredItems, item]
          }));
        }

        this.items.next([...filteredItems, item]);
        this.putItemHook(layerItem);
        return layerItem;
      }

      private onExpire(key: string): void {
        Observable
          .create(observer => observer.next())
          .timeoutWith(this.config.maxAge, Observable.of(1))
          .skip(1)
          .subscribe(observer => this.removeItem(key));
      }

      public removeItem(key: string): void {
        let newLayerItems = this.items.getValue().filter(item => item['key'] !== key);
        if (this.config.localStorage) {
          const newLayer = <CacheLayerInterface>{
            config: this.config,
            name: this.name,
            items: newLayerItems
          };
          localStorage.setItem(this.name, JSON.stringify(newLayer));
        }
        this.delete(key);
        this.items.next(newLayerItems);
      }

      getItemObservable(key: string): Observable<T> {
        return this.items.asObservable().map(res => this.has(key) ? this.items.getValue().filter(item => item['key'] === key)[0]: null);
      }

    }

    // console.log(Array.from(this.keys()))

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