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Implement "key()" method and "length" property (like in Storage interface) #28

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Implement "key()" method and "length" property (like in Storage interface) #28

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4 changes: 4 additions & 0 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,10 @@
"name": "Paritosh Patel",
"email": "13868399+paritosh64ce@users.noreply.github.com",
"url": "https://simplyfyingtechblog.wordpress.com"
},
{
"name": "Alexandre Moore",
"url": "https://github.com/alexandremoore"
}
],
"repository": {
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14 changes: 14 additions & 0 deletions src/services/cache.service.ts
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Expand Up @@ -14,6 +14,12 @@ const DEFAULT_ENABLED_STORAGE = CacheStoragesEnum.MEMORY;

@Injectable()
export class CacheService {
/**
* The number of data items stored in the storage
*/
public get length(): number {
return this._storage ? this._storage.length : 0 ;
}

/**
* Default cache options
Expand Down Expand Up @@ -147,6 +153,14 @@ export class CacheService {
this._prefix = prefix;
}

/**
* Get the name of the nth key in the storage
* @param index
*/
public key(index: number): string | null {
return this._storage.key(index);
}

/**
* Validate cache storage
*/
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10 changes: 10 additions & 0 deletions src/services/storage/cache-storage-abstract.service.ts
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Expand Up @@ -5,6 +5,10 @@ import {StorageValueInterface} from '../../interfaces/storage-value.interface';
* Abstract cache storage
*/
export abstract class CacheStorageAbstract {
/**
* The number of data items stored in the storage
*/
public abstract readonly length: number;

/**
* Get item from storage
Expand Down Expand Up @@ -40,4 +44,10 @@ export abstract class CacheStorageAbstract {
*/
public abstract isEnabled(): boolean;

/**
* Get the name of the nth key in the storage
* @param index
*/
public abstract key(index: number): string | null;

}
7 changes: 7 additions & 0 deletions src/services/storage/local-storage/cache-local-storage.service.ts
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Expand Up @@ -8,6 +8,9 @@ import {StorageValueInterface} from '../../../interfaces/storage-value.interface
*/
@Injectable()
export class CacheLocalStorage extends CacheStorageAbstract {
public get length(): number {
return localStorage ? localStorage.length : 0 ;
}

public getItem(key: string) {
const value = localStorage.getItem(key);
Expand Down Expand Up @@ -44,4 +47,8 @@ export class CacheLocalStorage extends CacheStorageAbstract {
return false;
}
}

public key(index: number): string | null {
return localStorage.key(index);
}
}
8 changes: 8 additions & 0 deletions src/services/storage/memory/cache-memory.service.ts
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Expand Up @@ -11,6 +11,10 @@ export class CacheMemoryStorage extends CacheStorageAbstract {

private _data: {[key: string]: any} = {};

public get length(): number {
return (this._data && Object.keys(this._data)) ? Object.keys(this._data).length : 0 ;
}

public getItem(key: string) {
return this._data[key] ? this._data[key] : null;
}
Expand All @@ -35,4 +39,8 @@ export class CacheMemoryStorage extends CacheStorageAbstract {
public isEnabled() {
return true;
}

public key(index: number): string | null {
return (this._data && Object.keys(this._data)) ? Object.keys(this._data)[index] : null;
}
}
7 changes: 7 additions & 0 deletions src/services/storage/session-storage/cache-session-storage.service.ts
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Expand Up @@ -8,6 +8,9 @@ import {StorageValueInterface} from '../../../interfaces/storage-value.interface
*/
@Injectable()
export class CacheSessionStorage extends CacheStorageAbstract {
public get length(): number {
return sessionStorage ? sessionStorage.length : 0 ;
}

public getItem(key: string) {
let value = sessionStorage.getItem(key);
Expand Down Expand Up @@ -44,4 +47,8 @@ export class CacheSessionStorage extends CacheStorageAbstract {
return false;
}
}

public key(index: number): string | null {
return sessionStorage.key(index);
}
}