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import Type from '../type';
export default class BaseCache
{
/**
* @private
*/
storage: Map<string, any> = new Map();
/**
* Gets cached value or default value
*/
get(key: string, defaultValue?: T | () => T): T
{
if (!this.storage.has(key))
{
if (Type.isFunction(defaultValue))
{
return defaultValue();
}
if (!Type.isUndefined(defaultValue))
{
return defaultValue;
}
}
return this.storage.get(key);
}
/**
* Sets cache entry
*/
set(key: string, value: any)
{
this.storage.set(key, value);
}
/**
* Deletes cache entry
*/
delete(key: string)
{
this.storage.delete(key);
}
/**
* Checks that storage contains entry with specified key
*/
has(key: string): boolean
{
return this.storage.has(key);
}
/**
* Gets cached value if exists,
*/
remember(key: string, defaultValue?: T | () => T): T
{
if (!this.storage.has(key))
{
if (Type.isFunction(defaultValue))
{
this.storage.set(key, defaultValue());
}
else if (!Type.isUndefined(defaultValue))
{
this.storage.set(key, defaultValue);
}
}
return this.storage.get(key);
}
/**
* Gets storage size
*/
size(): number
{
return this.storage.size;
}
/**
* Gets storage keys
*/
keys(): Array<string>
{
return [...this.storage.keys()];
}
/**
* Gets storage values
*/
values(): Array<any>
{
return [...this.storage.values()];
}
}