restructure

1 files changed, 0 insertions, 360 deletions

diff --git a/extension/lib/wallet/query.ts b/extension/lib/wallet/query.ts
deleted file mode 100644
index 62411dab3..000000000
--- a/extension/lib/wallet/query.ts
+++ /dev/null
@@ -1,360 +0,0 @@
-/*
- This file is part of TALER
- (C) 2016 GNUnet e.V.
-
- TALER is free software; you can redistribute it and/or modify it under the
- terms of the GNU General Public License as published by the Free Software
- Foundation; either version 3, or (at your option) any later version.
-
- TALER is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License along with
- TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
- */
-
-
-/**
- * Database query abstractions.
- * @module Query
- * @author Florian Dold
- */
-
-"use strict";
-
-
-export function Query(db) {
-  return new QueryRoot(db);
-}
-
-/**
- * Stream that can be filtered, reduced or joined
- * with indices.
- */
-export interface QueryStream<T> {
-  indexJoin<S>(storeName: string,
-               indexName: string,
-               keyFn: (obj: any) => any): QueryStream<[T,S]>;
-  filter(f: (any) => boolean): QueryStream<T>;
-  reduce<S>(f: (v: T, acc: S) => S, start?: S): Promise<S>;
-}
-
-
-/**
- * Get an unresolved promise together with its extracted resolve / reject
- * function.
- *
- * @returns {{resolve: any, reject: any, promise: Promise<T>}}
- */
-function openPromise<T>() {
-  let resolve, reject;
-  const promise = new Promise<T>((res, rej) => {
-    resolve = res;
-    reject = rej;
-  });
-  return {resolve, reject, promise};
-}
-
-
-abstract class QueryStreamBase<T> implements QueryStream<T> {
-  abstract subscribe(f: (isDone: boolean,
-                         value: any,
-                         tx: IDBTransaction) => void);
-
-  root: QueryRoot;
-
-  constructor(root: QueryRoot) {
-    this.root = root;
-  }
-
-  indexJoin<S>(storeName: string,
-               indexName: string,
-               key: any): QueryStream<[T,S]> {
-    this.root.addWork(null, storeName, false);
-    return new QueryStreamIndexJoin(this, storeName, indexName, key);
-  }
-
-  filter(f: (any) => boolean): QueryStream<T> {
-    return new QueryStreamFilter(this, f);
-  }
-
-  reduce(f, acc?): Promise<any> {
-    let leakedResolve;
-    let p = new Promise((resolve, reject) => {
-      leakedResolve = resolve;
-    });
-
-    this.subscribe((isDone, value) => {
-      if (isDone) {
-        leakedResolve(acc);
-        return;
-      }
-      acc = f(value, acc);
-    });
-
-    return Promise.resolve()
-                  .then(() => this.root.finish())
-                  .then(() => p);
-  }
-}
-
-
-class QueryStreamFilter<T> extends QueryStreamBase<T> {
-  s: QueryStreamBase<T>;
-  filterFn;
-
-  constructor(s: QueryStreamBase<T>, filterFn) {
-    super(s.root);
-    this.s = s;
-    this.filterFn = filterFn;
-  }
-
-  subscribe(f) {
-    this.s.subscribe((isDone, value, tx) => {
-      if (isDone) {
-        f(true, undefined, tx);
-        return;
-      }
-      if (this.filterFn(value)) {
-        f(false, value, tx)
-      }
-    });
-  }
-}
-
-
-class QueryStreamIndexJoin<T> extends QueryStreamBase<T> {
-  s: QueryStreamBase<T>;
-  storeName;
-  key;
-  indexName;
-
-  constructor(s, storeName: string, indexName: string, key: any) {
-    super(s.root);
-    this.s = s;
-    this.storeName = storeName;
-    this.key = key;
-    this.indexName = indexName;
-  }
-
-  subscribe(f) {
-    this.s.subscribe((isDone, value, tx) => {
-      if (isDone) {
-        f(true, undefined, tx);
-        return;
-      }
-      let s = tx.objectStore(this.storeName).index(this.indexName);
-      let req = s.openCursor(IDBKeyRange.only(this.key(value)));
-      req.onsuccess = () => {
-        let cursor = req.result;
-        if (cursor) {
-          f(false, [value, cursor.value], tx);
-          cursor.continue();
-        } else {
-          f(true, undefined, tx);
-        }
-      }
-    });
-  }
-}
-
-
-class IterQueryStream<T> extends QueryStreamBase<T> {
-  private storeName;
-  private options;
-
-  constructor(qr, storeName, options) {
-    super(qr);
-    this.options = options;
-    this.storeName = storeName;
-  }
-
-  subscribe(f) {
-    let doIt = (tx) => {
-      const {indexName = void 0, only = void 0} = this.options;
-      let s;
-      if (indexName !== void 0) {
-        s = tx.objectStore(this.storeName)
-              .index(this.options.indexName);
-      } else {
-        s = tx.objectStore(this.storeName);
-      }
-      let kr = undefined;
-      if (only !== void 0) {
-        kr = IDBKeyRange.only(this.options.only);
-      }
-      let req = s.openCursor(kr);
-      req.onsuccess = (e) => {
-        let cursor: IDBCursorWithValue = req.result;
-        if (cursor) {
-          f(false, cursor.value, tx);
-          cursor.continue();
-        } else {
-          f(true, undefined, tx);
-        }
-      }
-    };
-
-    this.root.addWork(doIt, null, false);
-  }
-}
-
-
-class QueryRoot {
-  private work = [];
-  private db: IDBDatabase;
-  private stores = new Set();
-  private kickoffPromise;
-
-  /**
-   * Some operations is a write operation,
-   * and we need to do a "readwrite" transaction/
-   */
-  private hasWrite;
-
-  constructor(db) {
-    this.db = db;
-  }
-
-  iter<T>(storeName, {only = void 0, indexName = void 0} = {}): QueryStream<T> {
-    this.stores.add(storeName);
-    return new IterQueryStream(this, storeName, {only, indexName});
-  }
-
-  /**
-   * Put an object into the given object store.
-   * Overrides if an existing object with the same key exists
-   * in the store.
-   */
-  put(storeName, val): QueryRoot {
-    let doPut = (tx: IDBTransaction) => {
-      tx.objectStore(storeName).put(val);
-    };
-    this.addWork(doPut, storeName, true);
-    return this;
-  }
-
-
-  /**
-   * Add all object from an iterable to the given object store.
-   * Fails if the object's key is already present
-   * in the object store.
-   */
-  putAll(storeName, iterable): QueryRoot {
-    const doPutAll = (tx: IDBTransaction) => {
-      for (const obj of iterable) {
-        tx.objectStore(storeName).put(obj);
-      }
-    };
-    this.addWork(doPutAll, storeName, true);
-    return this;
-  }
-
-  /**
-   * Add an object to the given object store.
-   * Fails if the object's key is already present
-   * in the object store.
-   */
-  add(storeName, val): QueryRoot {
-    const doAdd = (tx: IDBTransaction) => {
-      tx.objectStore(storeName).add(val);
-    };
-    this.addWork(doAdd, storeName, true);
-    return this;
-  }
-
-  /**
-   * Get one object from a store by its key.
-   */
-  get(storeName, key): Promise<any> {
-    if (key === void 0) {
-      throw Error("key must not be undefined");
-    }
-
-    const {resolve, promise} = openPromise();
-
-    const doGet = (tx) => {
-      const req = tx.objectStore(storeName).get(key);
-      req.onsuccess = (r) => {
-        resolve(req.result);
-      };
-    };
-
-    this.addWork(doGet, storeName, false);
-    return Promise.resolve()
-                  .then(() => this.finish())
-                  .then(() => promise);
-  }
-
-  /**
-   * Get one object from a store by its key.
-   */
-  getIndexed(storeName, indexName, key): Promise<any> {
-    if (key === void 0) {
-      throw Error("key must not be undefined");
-    }
-
-    const {resolve, promise} = openPromise();
-
-    const doGetIndexed = (tx) => {
-      const req = tx.objectStore(storeName).index(indexName).get(key);
-      req.onsuccess = (r) => {
-        resolve(req.result);
-      };
-    };
-
-    this.addWork(doGetIndexed, storeName, false);
-    return Promise.resolve()
-                  .then(() => this.finish())
-                  .then(() => promise);
-  }
-
-  /**
-   * Finish the query, and start the query in the first place if necessary.
-   */
-  finish(): Promise<void> {
-    if (this.kickoffPromise) {
-      return this.kickoffPromise;
-    }
-    this.kickoffPromise = new Promise((resolve, reject) => {
-      const mode = this.hasWrite ? "readwrite" : "readonly";
-      const tx = this.db.transaction(Array.from(this.stores), mode);
-      tx.oncomplete = () => {
-        resolve();
-      };
-      for (let w of this.work) {
-        w(tx);
-      }
-    });
-    return this.kickoffPromise;
-  }
-
-  /**
-   * Delete an object by from the given object store.
-   */
-  delete(storeName: string, key): QueryRoot {
-    const doDelete = (tx) => {
-      tx.objectStore(storeName).delete(key);
-    };
-    this.addWork(doDelete, storeName, true);
-    return this;
-  }
-
-  /**
-   * Low-level function to add a task to the internal work queue.
-   */
-  addWork(workFn: (IDBTransaction) => void,
-          storeName: string,
-          isWrite: boolean) {
-    if (storeName) {
-      this.stores.add(storeName);
-    }
-    if (isWrite) {
-      this.hasWrite = true;
-    }
-    if (workFn) {
-      this.work.push(workFn);
-    }
-  }
-}
\ No newline at end of file