96 lines
No EOL
2.9 KiB
TypeScript
96 lines
No EOL
2.9 KiB
TypeScript
class FileCache {
|
|
private static dbHandle: IDBDatabase = null;
|
|
|
|
public static initCache(success: ()=>void,
|
|
error: (error: string)=>void): void
|
|
{
|
|
var request = window.indexedDB.open("fileCache", 3);
|
|
|
|
request.onupgradeneeded = (event: any) => {
|
|
var db: IDBDatabase = event.target.result;
|
|
|
|
if(db.objectStoreNames.contains("files"))
|
|
db.deleteObjectStore("files");
|
|
|
|
if(db.objectStoreNames.contains("metadata"))
|
|
db.deleteObjectStore("metadata");
|
|
|
|
if(db.objectStoreNames.contains("hashes"))
|
|
db.deleteObjectStore("hashes");
|
|
|
|
db.createObjectStore("files",
|
|
{keyPath: "name", autoIncrement: false});
|
|
db.createObjectStore("metadata",
|
|
{keyPath: "name", autoIncrement: false});
|
|
};
|
|
|
|
request.onerror = (event: any) => {
|
|
error("Could not upgrade the client database "
|
|
+"to the most recent version.");
|
|
};
|
|
|
|
request.onsuccess = (event: any) => {
|
|
this.dbHandle = request.result;
|
|
success();
|
|
};
|
|
}
|
|
|
|
public static getMeta(fileName: string, success: (meta: FileMeta)=>void,
|
|
error: (error: string)=>void): void
|
|
{
|
|
var query = this.dbHandle.transaction("metadata");
|
|
var store = query.objectStore("metadata");
|
|
var request = store.get(fileName);
|
|
|
|
request.onsuccess = () => {
|
|
success(request.result);
|
|
};
|
|
|
|
request.onerror = (event: any) => {
|
|
error("Could not get metadata for file "+ fileName);
|
|
};
|
|
}
|
|
|
|
public static setMeta(meta: FileMeta) {
|
|
var query = this.dbHandle.transaction("metadata", "readwrite");
|
|
var store = query.objectStore("metadata");
|
|
store.put(meta);
|
|
}
|
|
|
|
public static getFile(fileName: string,
|
|
success: (name: string, data: Uint8Array)=>void,
|
|
error: (error: string)=>void): void
|
|
{
|
|
var query = this.dbHandle.transaction("files");
|
|
var store = query.objectStore("files");
|
|
var request = store.get(fileName);
|
|
|
|
request.onsuccess = () => {
|
|
success(request.result.name, request.result.data);
|
|
};
|
|
|
|
request.onerror = (event: any) => {
|
|
error("Could not get contents for file "+ fileName);
|
|
};
|
|
}
|
|
|
|
public static setFile(fileName: string, data: Uint8Array) {
|
|
var query = this.dbHandle.transaction("files", "readwrite");
|
|
var store = query.objectStore("files");
|
|
store.put({name: fileName, data: data});
|
|
}
|
|
|
|
public static deleteFile(fileName: string) {
|
|
var query = this.dbHandle.transaction("files", "readwrite");
|
|
var store = query.objectStore("files");
|
|
store.delete(fileName);
|
|
store = query.objectStore("metadata");
|
|
store.delete(fileName);
|
|
}
|
|
}
|
|
|
|
class FileMeta {
|
|
name: string;
|
|
type: string;
|
|
hash: string;
|
|
} |