wip: Delete LevelDB database

Author: ohtake

package.json

@@ -30,6 +30,7 @@
     "react-split-pane": "^0.1.77",
     "react-timeago": "^3.4.3",
     "remark": "^9.0.0",
+    "rimraf": "^2.6.2",
     "router": "^1.3.2",
     "socket.io": "1.3.7",
     "socket.io-client": "1.3.7",
@@ -78,7 +79,6 @@
     "postcss": "^6.0.19",
     "postcss-loader": "^2.1.1",
     "react-test-renderer": "^16.2.0",
-    "rimraf": "^2.6.2",
     "sanitize-filename": "^1.6.1",
     "sinon": "^4.4.2",
     "source-map-explorer": "^1.5.0",

src/server/LevelDBLib.js

@@ -1,5 +1,6 @@
 import { join, sep } from 'path';
 import { lstatSync, readdirSync } from 'fs';
+import rimraf from 'rimraf';
 
 const unsafeChars = /[^-_a-zA-Z0-9]/g;
 const windowsReserved = /^(con|prn|aux|nul|com[0-9]|lpt[0-9])(\..*)?$/i;
@@ -77,4 +78,22 @@ export default class LevelDBLib {
     }
     return y.db.whenTransactionsFinished();
   }
+  /**
+   * Deletes database. The database must be closed before deleting.
+   * @param {string} path parent directory of each levelDB database
+   * @param {string} page raw page name of wiki page
+   * @returns {Promise}
+   */
+  static deleteDatabase(path, page) {
+    const dbpath = join(path, LevelDBLib.escapeNamespace(page));
+    return new Promise((resolve, reject) => {
+      rimraf(dbpath, {}, (err) => {
+        if (err) {
+          reject(err);
+          return;
+        }
+        resolve();
+      });
+    });
+  }
 }