Using the mcpher library in your code

This Google Apps Script library contains a significant amount of the code you will need for most samples on this site. You access access my full library here

su_button url=”https://docs.google.com/spreadsheets/d/1DlKpVVYCrCPNfRbGsz6N_K3oPTgdC9gQIKi0aNb42uI/edit#gid=0″ target=”blank” style=”glass” center=”yes” icon=”icon: download” icon_color=”#f50808″ desc=”Get Library Info”][/su_button]

Here’s how to include it in your code.

Page Content hide

1 How to include mcpher library in your project

2 Add a reference to the shared library.

3 References

4 The Code

How to include mcpher library in your project

Create a new document that is going to access this library, and bring up the Manage Libraries dialog in the script editor.

Add a reference to the shared library.

You’ll see whichever versions are available. If you leave development mode off, then your usage will be frozen to the version you select. You can change the Identifier to something else if you like. Its purpose is to nominate the namespace you will use to reference the shared functions. In this library shown all calls will be prefixed with the Mcpher namespace identifier – for example Mcpher.isEmpty().

References

Project Key :

MEQ3tE5y5_cTOAgUbUKSIAiz3TLx7pV4j

The Code

Expand to access the code

/**
 * @static
 */
var dbSilo;

function createDbSilos(optionalDb){
  return dbSilo ? 
      dbSilo : 
      (dbSilo = new cScriptDbSilo(optionalDb));
}
function librarySiloDb() {
  return ScriptDb.getMyDb();
}
/**
 * a cScriptDbSilo
 * @class 
 * @param {ScriptDbInstance} Db the default scriptDB
 * @implements {cScriptDbSilo}
 * @return {cScriptDbSilo} a new cScriptDbSilo
 */
function cScriptDbSilo(optionalDb) {
// create a Silo for known script silos
  this.xSilos = new collection();
  this.silos = function () {
    return this.xSilos;
  };

  this.xDb = IsMissing(optionalDb) ?  librarySiloDb() : optionalDb;
 
  return this;
}
/**
 * return the db silo item associated with the given key
 * @param {string} k the key
 * @param {ScriptDbInstance=} optionalDb the default scriptDB (default the db for the silo collection)
 * @param {boolean=} createIfUnknown whether to create the item if it doesnt exist (default true)
 * @param {boolean=} optionalHash whether to encrypt the userstamp
 * @param {boolean=} optionalMeOnly whether to filter by only records that I created
 * @return {cScriptDbSiloItem} the cScriptDbSiloItem
 */
function scriptDbSilo(k,optionalDb,createIfUnknown,optionalHash,optionalMeOnly) {
// find the Silo associated with this key

    // get the item or create it
    var dbSilo = createDbSilos(optionalDb);
    if (IsMissing(k)) 
      return dbSilo;
    else {
      var silo = dbSilo.silos().item(k,false);
    // return the SiloItem, or create one if it's allowed
      return silo ? silo : (fixOptional (createIfUnknown,true) ?  dbSilo.init(k,optionalDb,optionalHash,optionalMeOnly) : null) ;
    }
}
/**
 * add db silo item associated with the given key
 * @param {string} k the key
 * @param {ScriptDbInstance=} optionalDb the default scriptDB (default the db for the silo collection)
 * @param {boolean=} optionalHash whether to encrypt the userstamp
 * @param {boolean=} optionalMeOnly whether to filter by only records that I created
 * @return {cScriptDbSiloItem} the cScriptDbSiloItem
 */
cScriptDbSilo.prototype.init = function (k,optionalDb,optionalHash,optionalMeOnly) {
  return this.silos().add (new cScriptDbSiloItem(k,this,optionalDb,optionalHash,optionalMeOnly),k);
};
/**
 * remove all db silo items for this db
 * @param {object} ob the query by example object
 * @param {ScriptDbInstance=} optionalDb the default scriptDB (default the db for the silo collection)
 * @return {cScriptDbSilo} the cScriptDbSilo
 */
cScriptDbSilo.prototype.remove = function (ob,optionalDb) {
  return this.removeData(ob,optionalDb);
}

/**
 * remove db silo item data associated with the given query object
 * @param {object} ob the query by example object
 * @param {ScriptDbInstance=} optionalDb the default scriptDB (default the db for the silo collection)
 * @return {cScriptDbSilo} the cScriptDbSilo
 */
cScriptDbSilo.prototype.removeData = function (ob,optionalDb) {
    var qob = fixOptional(ob,{});
    //-- disabled for now---only allowed to delete your own data
    //qob.userStamp = Session.getUser().getEmail();
    //if (this.xHash) qob.userStamp = shortKeyHash(qob.userStamp);
    var db = fixOptional(optionalDb, this.xDb);
    
    // we'll use removeBatch
    while(true) {
      var result = db.query(qob); // get everything, up to limit
      if (result.getSize() == 0) {
        break;
      }
      var o = [];
      while (result.hasNext()) {
        if (o.length > this.xBatchMax) {
          DebugAssert(db.allOk(db.removeBatch(o, false)), "failed to delete " + o.length + " objects"); 
          o = [];
        }
        o.push(result.next());
      }
      
      if (o.length > 0 ) {
        var result = db.removeBatch(o, false);
        DebugAssert(db.allOk(result), "failed to delete " + o.length + " objects"); 
      }
    }
  
  return this;
}

/**
 * fill the silos from the data in the script DB
 * @param {object} ob the query by example object
 * @param {ScriptDbInstance=} optionalDb the default scriptDB (default the db for the silo collection)
 * @return {cScriptDbSilo} the cScriptDbSilo
 */
cScriptDbSilo.prototype.fill = function (optionalDb) {
// fill Silo with every known silo  in the given db
    var db = fixOptional ( optionalDb, this.xDb);
    var result = db.query({}); //note-- only works up to the limit

      while (result.hasNext()) {
        var k = result.next().siloId;
        if ( ! this.Silos.item(k,false) ) 
          this.Silos().add (new cScriptDbSiloItem(k,this,db),k ); 
      }

  return this;
};
/**
 * a cScriptDbSiloItem
 * @class 
 * @param {string} k the key
 * @param {cScriptDbSilo=} parent the collection of silo items
 * @param {boolean=} optionalHash whether to encrypt the userstamp
 * @param {boolean=} optionalMeOnly whether to filter by only records that I created
 * @implements {cScriptDbSiloItem}
 * @return {cScriptDbSiloItem} a new cScriptDbSiloItem
 */

function cScriptDbSiloItem(k,parent,optionalDb,optionalHash,optionalMeOnly) {
  // a silo item
  this.xBatch = [];
  this.xKey = makeKey(k);
  this.xParent = parent;
  this.xHash = fixOptional( optionalHash, false);
  this.xMeOnly = fixOptional( optionalMeOnly, false);
  this.xDb = fixOptional( optionalDb , this.xParent.xDb);
  this.db = function() {
    return this.xDb;
  }
  // this is wont change in a silo session so may as well do it once
  this.xWho = this.who();
  // there is a bug in savebatch that failes for more than about 4000
  // here's a workaround
  this.xBatchMax = 4000;
  return this;
}
/**
 * construct the query object that identifies this query by example
 * @param {object=} ob the query by example (default all data)
 * @return {object}  a query by example to silo the data
 */
cScriptDbSiloItem.prototype.querySet = function(ob) {
  // apply a query for this silo
  var newOb = fixOptional(ob,{});
  newOb.siloId = this.xKey;
  if (!newOb.userStamp && this.xMeOnly) newOb.userStamp = this.xWho;
  return newOb ;
};
cScriptDbSiloItem.prototype.queryStamp = function(ob) {
  // apply a user and time stamp
  ob.timeStamp = new Date().getTime();
  ob.userStamp = this.xWho;
  return ob;
};
/**
 * do a query within the silo for this cScriptDbSiloItem
 * @param {object} [ob={}]  the query by example (default all data)
 * @param {object} [ob={}]  the query by example (default all data)
 * @return {ScriptDBquery} a query by example to silo the data
 */
cScriptDbSiloItem.prototype.query = function(ob) {
  return this.db().query(this.querySet(ob));
};
/**
 * do a query within the silo and put to an array, taking account of limits
 * @param {object} [ob={}]  the query by example (default all data)
 * @param {object} [ob={}]  the query by example (default all data)
 * @param {number} [optLimit=0]  default bypass any limits
 * @return {Array} an array of results
 */
cScriptDbSiloItem.prototype.queryArray = function(ob, optLimit) {
  
  // this is the max I'll take in one go to be compatible with parse.com
  var maxLimit = 1000;
  var limit = fixOptional ( optLimit, 0);
  var results =[], q = this.querySet(ob);
  while(true) {
    var qr =  this.db()
                .query(q)
                .limit(limit > 0 ? limit-results.length : maxLimit).startAt(results.length);
    // we're done
    if (!qr.hasNext()) return results;
    // still have pushing to do
    while(qr.hasNext() && (limit==0 || results.length < limit)) results.push(qr.next());
  }
  
};
/**
 * do a count query within the silo for this cScriptDbSiloItem
 * @param {object} [ob={}] the query by example (default all data)
 * @return {ScriptDBquery} a query by example to silo the data
 */
cScriptDbSiloItem.prototype.count = function(ob) {
  return this.db().count(this.querySet(ob));
};
/**
 * do a save within the silo for this cScriptDbSiloItem
 * @param {object} ob the data so save
 * @param {boolean} optBatch whether or not to save up for a batch update
 * @return {ScriptDbResult} a query result 
 */
cScriptDbSiloItem.prototype.save = function(ob,optBatch) {
  var sob = this.queryStamp(this.querySet(ob));
  if (fixOptional (optBatch, false)) {
    if (this.batchLength() > this.xBatchMax) {
      this.saveBatch();
    }
    this.xBatch.push(sob);
  }
  else
    return this.db().save(sob);
};
/**
 * provide current batch length 
 * @return {number} the batch length
 */
cScriptDbSiloItem.prototype.batchLength = function() {
  return this.xBatch ? this.xBatch.length : 0;
};
/**
 * clear out any batch items
 * @return {ScriptDbResult} a query result 
 */
cScriptDbSiloItem.prototype.saveBatch = function() {
   if (this.xBatch.length) {
     var results = this.db().saveBatch(this.xBatch, false);
     this.xBatch = [];
     return results;
   }
   else 
     return null;   
};
/**
 * do a save within the silo for this cScriptDbSiloItem, and delete the data
 * @param {object=} ob the data so remove (default all data for this silo)
 * @return {cScriptDbSiloItem} the cScriptDbSiloItem
 */
cScriptDbSiloItem.prototype.remove = function(ob) {
  return this.xParent.removeData(this.querySet(ob),this.db());
};
/**
 * get who user is, and hash email address if required
 * @param {boolean=} optHash whether to encrypt, otherwise use the silo default
 * @return {string} the user email or hashed emaik
 */
cScriptDbSiloItem.prototype.who = function(optHash) {
  return fixOptional(optHash, this.xHash) ? shortKeyHash(Session.getUser().getEmail()) : Session.getUser().getEmail();
};
/**
 * return the stuff from the db associated with the e.parameter.entry value
 * @param {String} siloNamethe the locker name
 * @param {scriptDB} db the private db to use
 * @return {ContentService} the rest response
 */
function getMyStuff (siloName, db) {

    var response = {status: {code:"bad", reason:"entry parameter not found"}, result:null};
    var silo = scriptDbSilo(siloName,db);
    var thisMail = silo.who();
    
    if (!db) {
      response.reason = "private db must be specified" ;
    }
    else if (siloName) 
    { var q=  silo.query();
      if (q.hasNext()) {
        // only retrievable by teh same user as created it
        var result = q.next();
        try {
           if (result.userStamp != thisMail) {
             response.status.code = "bad";
             response.status.reason = siloName + "does not belong to you";
           }
           else {
             response.status.code = "good";
             response.status.reason = siloName + " found in your stuff";
             response.result = result;
           }
             
          }
          catch (err) {
            response.status.code = "bad";
            response.status.reason = err;
          }
      } 
      else {
        response.status.code = "bad";
        response.status.reason = siloName + " not found in your stuff";
      }
    }

    return response;
}
/**
 * create an entry for the given siloname value
 * @param {String} siloNamethe the locker name
 * @param {scriptDB} db the private db to use
 * @param {object} content the content to store
 * @return {scriptDBObject} the saved object
 */
function createStuff (siloName, db, content) {
  // exist?
  DebugAssert(db, "you must provide a db");
  var silo =  scriptDbSilo(siloName,db);
  var myAuth = silo.query();
  if (myAuth.hasNext()) silo.remove();
  var put = {};
  put.myStuff = content;
  put.help = "for details see ramblings.mcpher.com";
  return silo.save(put);
}
/** react to a doGet(e) using lockbox for oAuth
 * @param {object} e as passed to doGet() (show or oauth)
 * @param {scriptDBInstance} db the private db to use
 * @return {String} the json string content
 */
function getStuffContent (e,db) {
   //parameters 
   // e.parameter.entry - the lockBox entry name
   // e.parameter.proxyUrl - optional - if specifed then proxyUrl to execute , using lockbox entry for oAuth 
   // e.parameter.action - manadatory - (not implemented yet edit,)show,oauth

  var content ="";
  if(IsMissing(db)) 
    content = JSON.stringify ({error: "programming error - you must provide a scriptDB to use"}) ;
 else {
    var entry =  decodeURIComponent(e.parameter.entry)
    var proxyurl = decodeURIComponent(e.parameter.proxyurl) ;
    var action = decodeURIComponent(e.parameter.action);
    

    try {
  
      switch (action) {
        case 'edit':
          content= JSON.stringify ({error: "action not yet implemented" + action}) ;
          break;
          //TODO return uiStuff (db, entry);
          
        case 'show':
          content = JSON.stringify(getMyStuff(entry,db));
          break;
          
        case 'oauth':
          content = oAuthProxy (db,entry, proxyurl).getContentText();
          break;
          
        default:
          content = JSON.stringify ({error: "unknown action - should be show or oauth" + action}) ;
          break;
      } 
    }
    catch (err) {
        content = JSON.stringify ( { error: err } );
    }
   
   
   }
   return content;
  
}
/**
 * oAuthPacket will create a packet of options and oauth parameters
 * @param {object} stuff contents of an oauth lockbox
 * @return {urlfetch.advancedoptions} the packet to use as options to urlfetch
 */ 
function oAuthPacket(stuff) {

  // relevant properties from silo
    var locker = stuff.result.myStuff;
    var siloId = stuff.result.siloId;
    
  // use GAS oauth library
    var oa = UrlFetchApp.addOAuthService(siloId);
    oa.setAccessTokenUrl (locker.accessUrl);
    oa.setRequestTokenUrl (locker.requestUrl);
    oa.setAuthorizationUrl(locker.authorizeUrl);
    oa.setConsumerKey(locker.consumerKey);
    oa.setConsumerSecret(locker.consumerSecret);
  
  // advanced oauth options
    return {
      "oAuthServiceName": siloId,
      "oAuthUseToken" : "always"
     };
}
/**
 * oAuthProxy will execute an oauth then call some url by proxy
 * @param {String} siloId siloid of the scriptdb locker holding the oauth information
 * @param {scriptDBInstance} db the private db to use
 * @param {String} url to execute
 * @return {String} response from the urlfetch
 */                
function oAuthProxy (db,siloId, url) {

  // get myStuff - this will have previously been stored in the myStuff locker
  var stuff = getMyStuff(siloId,db);
  DebugAssert(stuff.status.code == "good", "error getting secrets " + JSON.stringify(stuff) );

  // construct the oauth packet
  var packet = oAuthPacket(stuff);
  
  // issue request
   return UrlFetchApp.fetch(url, packet);
  
}
/**
 * return the stuff from the db associated with the e.parameter.entry value
 * @param {String} siloNamethe the locker name
 * @param {scriptdbinstance} db public db
 * @param {queryOb} optQuery optional query by example
 * @return {ContentService} the rest response
 */
function getPubStuff (siloName, db, optQuery) {
  var q;

  var response = {status: {code:"bad", reason:"unknown error"}, results:null};
  var ob = optQuery || {}; 
  
  q=  siloName ? scriptDbSilo(siloName,db).query(ob) : db.query(ob);
  if (q.hasNext()) {
    response.status.code = "good";
    response.status.reason = siloName + " found in your stuff";
    response.results =  [] ;
    while (q.hasNext()) {
      response.results.push(q.next());
    }
  }
  else {
    response.status.reason = siloName + " has no data";
    response.status.query = JSON.stringify(ob);
  }   
  return response;
}

/** react to a doGet(e) to return public data
 * @param {object} e as passed to doGet() 
 * @param {scriptdbinstance} db public db
 * @return {String} the json string content
 */
function getPubStuffContent (e,db) {
   //parameters 
   // e.parameter.entry - optional the lockBox entry name
  var content ;
  var entry =  e.parameter && e.parameter.entry ? decodeURIComponent(e.parameter.entry)  : null;
  try {
          content = JSON.stringify(getPubStuff(entry,db));
  } 
  catch (err) {
        content = JSON.stringify ( { error: err } );
  }

   return content;
  
}

/** show everything in a given db
 * @param {scriptdbinstance} db public db
 * @return {String} the json string content
 */
function showAll(db) {
  var results = db.query({});

  while (results.hasNext()) {
    var result = results.next();
    Logger.log(Utilities.jsonStringify(result));
  }
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

/**

* @static

var dbSilo;

function createDbSilos(optionalDb){

return dbSilo ?

dbSilo :

(dbSilo = new cScriptDbSilo(optionalDb));

}

function librarySiloDb() {

return ScriptDb.getMyDb();

}

/**

* a cScriptDbSilo

* @class

* @param {ScriptDbInstance} Db the default scriptDB

* @implements {cScriptDbSilo}

* @return {cScriptDbSilo} a new cScriptDbSilo

function cScriptDbSilo(optionalDb) {

// create a Silo for known script silos

this.xSilos = new collection();

this.silos = function () {

return this.xSilos;

};

this.xDb = IsMissing(optionalDb) ? librarySiloDb() : optionalDb;

return this;

}

/**

* return the db silo item associated with the given key

* @param {string} k the key

* @param {ScriptDbInstance=} optionalDb the default scriptDB (default the db for the silo collection)

* @param {boolean=} createIfUnknown whether to create the item if it doesnt exist (default true)

* @param {boolean=} optionalHash whether to encrypt the userstamp

* @param {boolean=} optionalMeOnly whether to filter by only records that I created

* @return {cScriptDbSiloItem} the cScriptDbSiloItem

function scriptDbSilo(k,optionalDb,createIfUnknown,optionalHash,optionalMeOnly) {

// find the Silo associated with this key

// get the item or create it

var dbSilo = createDbSilos(optionalDb);

if (IsMissing(k))

return dbSilo;

else {

var silo = dbSilo.silos().item(k,false);

// return the SiloItem, or create one if it's allowed

return silo ? silo : (fixOptional (createIfUnknown,true) ? dbSilo.init(k,optionalDb,optionalHash,optionalMeOnly) : null) ;

}

/**

* add db silo item associated with the given key

* @param {string} k the key

* @param {ScriptDbInstance=} optionalDb the default scriptDB (default the db for the silo collection)

* @param {boolean=} optionalHash whether to encrypt the userstamp

* @param {boolean=} optionalMeOnly whether to filter by only records that I created

* @return {cScriptDbSiloItem} the cScriptDbSiloItem

cScriptDbSilo.prototype.init = function (k,optionalDb,optionalHash,optionalMeOnly) {

return this.silos().add (new cScriptDbSiloItem(k,this,optionalDb,optionalHash,optionalMeOnly),k);

};

/**

* remove all db silo items for this db

* @param {object} ob the query by example object

* @param {ScriptDbInstance=} optionalDb the default scriptDB (default the db for the silo collection)

* @return {cScriptDbSilo} the cScriptDbSilo

cScriptDbSilo.prototype.remove = function (ob,optionalDb) {

return this.removeData(ob,optionalDb);

}

/**

* remove db silo item data associated with the given query object

* @param {object} ob the query by example object

* @param {ScriptDbInstance=} optionalDb the default scriptDB (default the db for the silo collection)

* @return {cScriptDbSilo} the cScriptDbSilo

cScriptDbSilo.prototype.removeData = function (ob,optionalDb) {

var qob = fixOptional(ob,{});

//-- disabled for now---only allowed to delete your own data

//qob.userStamp = Session.getUser().getEmail();

//if (this.xHash) qob.userStamp = shortKeyHash(qob.userStamp);

var db = fixOptional(optionalDb, this.xDb);

// we'll use removeBatch

while(true) {

var result = db.query(qob); // get everything, up to limit

if (result.getSize() == 0) {

break;

}

var o = [];

while (result.hasNext()) {

if (o.length > this.xBatchMax) {

DebugAssert(db.allOk(db.removeBatch(o, false)), "failed to delete " + o.length + " objects");

o = [];

}

o.push(result.next());

}

if (o.length > 0 ) {

var result = db.removeBatch(o, false);

DebugAssert(db.allOk(result), "failed to delete " + o.length + " objects");

}

return this;

}

/**

* fill the silos from the data in the script DB

* @param {object} ob the query by example object

* @param {ScriptDbInstance=} optionalDb the default scriptDB (default the db for the silo collection)

* @return {cScriptDbSilo} the cScriptDbSilo

cScriptDbSilo.prototype.fill = function (optionalDb) {

// fill Silo with every known silo in the given db

var db = fixOptional ( optionalDb, this.xDb);

var result = db.query({}); //note-- only works up to the limit

while (result.hasNext()) {

var k = result.next().siloId;

if ( ! this.Silos.item(k,false) )

this.Silos().add (new cScriptDbSiloItem(k,this,db),k );

}

return this;

};

/**

* a cScriptDbSiloItem

* @class

* @param {string} k the key

* @param {cScriptDbSilo=} parent the collection of silo items

* @param {boolean=} optionalHash whether to encrypt the userstamp

* @param {boolean=} optionalMeOnly whether to filter by only records that I created

* @implements {cScriptDbSiloItem}

* @return {cScriptDbSiloItem} a new cScriptDbSiloItem

function cScriptDbSiloItem(k,parent,optionalDb,optionalHash,optionalMeOnly) {

// a silo item

this.xBatch = [];

this.xKey = makeKey(k);

this.xParent = parent;

this.xHash = fixOptional( optionalHash, false);

this.xMeOnly = fixOptional( optionalMeOnly, false);

this.xDb = fixOptional( optionalDb , this.xParent.xDb);

this.db = function() {

return this.xDb;

}

// this is wont change in a silo session so may as well do it once

this.xWho = this.who();

// there is a bug in savebatch that failes for more than about 4000

// here's a workaround

this.xBatchMax = 4000;

return this;

}

/**

* construct the query object that identifies this query by example

* @param {object=} ob the query by example (default all data)

* @return {object} a query by example to silo the data

cScriptDbSiloItem.prototype.querySet = function(ob) {

// apply a query for this silo

var newOb = fixOptional(ob,{});

newOb.siloId = this.xKey;

if (!newOb.userStamp && this.xMeOnly) newOb.userStamp = this.xWho;

return newOb ;

};

cScriptDbSiloItem.prototype.queryStamp = function(ob) {

// apply a user and time stamp

ob.timeStamp = new Date().getTime();

ob.userStamp = this.xWho;

return ob;

};

/**

* do a query within the silo for this cScriptDbSiloItem

* @param {object} [ob={}] the query by example (default all data)

* @return {ScriptDBquery} a query by example to silo the data

cScriptDbSiloItem.prototype.query = function(ob) {

return this.db().query(this.querySet(ob));

};

/**

* do a query within the silo and put to an array, taking account of limits

* @param {object} [ob={}] the query by example (default all data)

* @param {number} [optLimit=0] default bypass any limits

* @return {Array} an array of results

cScriptDbSiloItem.prototype.queryArray = function(ob, optLimit) {

// this is the max I'll take in one go to be compatible with parse.com

var maxLimit = 1000;

var limit = fixOptional ( optLimit, 0);

var results =[], q = this.querySet(ob);

while(true) {

var qr = this.db()

.query(q)

.limit(limit > 0 ? limit-results.length : maxLimit).startAt(results.length);

// we're done

if (!qr.hasNext()) return results;

// still have pushing to do

while(qr.hasNext() && (limit==0 || results.length < limit)) results.push(qr.next());

}

};

/**

* do a count query within the silo for this cScriptDbSiloItem

* @param {object} [ob={}] the query by example (default all data)

* @return {ScriptDBquery} a query by example to silo the data

cScriptDbSiloItem.prototype.count = function(ob) {

return this.db().count(this.querySet(ob));

};

/**

* do a save within the silo for this cScriptDbSiloItem

* @param {object} ob the data so save

* @param {boolean} optBatch whether or not to save up for a batch update

* @return {ScriptDbResult} a query result

cScriptDbSiloItem.prototype.save = function(ob,optBatch) {

var sob = this.queryStamp(this.querySet(ob));

if (fixOptional (optBatch, false)) {

if (this.batchLength() > this.xBatchMax) {

this.saveBatch();

}

this.xBatch.push(sob);

}

else

return this.db().save(sob);

};

/**

* provide current batch length

* @return {number} the batch length

cScriptDbSiloItem.prototype.batchLength = function() {

return this.xBatch ? this.xBatch.length : 0;

};

/**

* clear out any batch items

* @return {ScriptDbResult} a query result

cScriptDbSiloItem.prototype.saveBatch = function() {

if (this.xBatch.length) {

var results = this.db().saveBatch(this.xBatch, false);

this.xBatch = [];

return results;

}

else

return null;

};

/**

* do a save within the silo for this cScriptDbSiloItem, and delete the data

* @param {object=} ob the data so remove (default all data for this silo)

* @return {cScriptDbSiloItem} the cScriptDbSiloItem

cScriptDbSiloItem.prototype.remove = function(ob) {

return this.xParent.removeData(this.querySet(ob),this.db());

};

/**

* get who user is, and hash email address if required

* @param {boolean=} optHash whether to encrypt, otherwise use the silo default

* @return {string} the user email or hashed emaik

cScriptDbSiloItem.prototype.who = function(optHash) {

return fixOptional(optHash, this.xHash) ? shortKeyHash(Session.getUser().getEmail()) : Session.getUser().getEmail();

};

/**

* return the stuff from the db associated with the e.parameter.entry value

* @param {String} siloNamethe the locker name

* @param {scriptDB} db the private db to use

* @return {ContentService} the rest response

function getMyStuff (siloName, db) {

var response = {status: {code:"bad", reason:"entry parameter not found"}, result:null};

var silo = scriptDbSilo(siloName,db);

var thisMail = silo.who();

if (!db) {

response.reason = "private db must be specified" ;

}

else if (siloName)

{ var q= silo.query();

if (q.hasNext()) {

// only retrievable by teh same user as created it

var result = q.next();

try {

if (result.userStamp != thisMail) {

response.status.code = "bad";

response.status.reason = siloName + "does not belong to you";

}

else {

response.status.code = "good";

response.status.reason = siloName + " found in your stuff";

response.result = result;

}

catch (err) {

response.status.code = "bad";

response.status.reason = err;

}

else {

response.status.code = "bad";

response.status.reason = siloName + " not found in your stuff";

}

return response;

}

/**

* create an entry for the given siloname value

* @param {String} siloNamethe the locker name

* @param {scriptDB} db the private db to use

* @param {object} content the content to store

* @return {scriptDBObject} the saved object

function createStuff (siloName, db, content) {

// exist?

DebugAssert(db, "you must provide a db");

var silo = scriptDbSilo(siloName,db);

var myAuth = silo.query();

if (myAuth.hasNext()) silo.remove();

var put = {};

put.myStuff = content;

put.help = "for details see ramblings.mcpher.com";

return silo.save(put);

}

/** react to a doGet(e) using lockbox for oAuth

* @param {object} e as passed to doGet() (show or oauth)

* @param {scriptDBInstance} db the private db to use

* @return {String} the json string content

function getStuffContent (e,db) {

//parameters

// e.parameter.entry - the lockBox entry name

// e.parameter.proxyUrl - optional - if specifed then proxyUrl to execute , using lockbox entry for oAuth

// e.parameter.action - manadatory - (not implemented yet edit,)show,oauth

var content ="";

if(IsMissing(db))

content = JSON.stringify ({error: "programming error - you must provide a scriptDB to use"}) ;

else {

var entry = decodeURIComponent(e.parameter.entry)

var proxyurl = decodeURIComponent(e.parameter.proxyurl) ;

var action = decodeURIComponent(e.parameter.action);

try {

switch (action) {

case 'edit':

content= JSON.stringify ({error: "action not yet implemented" + action}) ;

break;

//TODO return uiStuff (db, entry);

case 'show':

content = JSON.stringify(getMyStuff(entry,db));

break;

case 'oauth':

content = oAuthProxy (db,entry, proxyurl).getContentText();

break;

default:

content = JSON.stringify ({error: "unknown action - should be show or oauth" + action}) ;

break;

}

catch (err) {

content = JSON.stringify ( { error: err } );

}

return content;

}

/**

* oAuthPacket will create a packet of options and oauth parameters

* @param {object} stuff contents of an oauth lockbox

* @return {urlfetch.advancedoptions} the packet to use as options to urlfetch

function oAuthPacket(stuff) {

// relevant properties from silo

var locker = stuff.result.myStuff;

var siloId = stuff.result.siloId;

// use GAS oauth library

var oa = UrlFetchApp.addOAuthService(siloId);

oa.setAccessTokenUrl (locker.accessUrl);

oa.setRequestTokenUrl (locker.requestUrl);

oa.setAuthorizationUrl(locker.authorizeUrl);

oa.setConsumerKey(locker.consumerKey);

oa.setConsumerSecret(locker.consumerSecret);

// advanced oauth options

return {

"oAuthServiceName": siloId,

"oAuthUseToken" : "always"

};

}

/**

* oAuthProxy will execute an oauth then call some url by proxy

* @param {String} siloId siloid of the scriptdb locker holding the oauth information

* @param {scriptDBInstance} db the private db to use

* @param {String} url to execute

* @return {String} response from the urlfetch

function oAuthProxy (db,siloId, url) {

// get myStuff - this will have previously been stored in the myStuff locker

var stuff = getMyStuff(siloId,db);

DebugAssert(stuff.status.code == "good", "error getting secrets " + JSON.stringify(stuff) );

// construct the oauth packet

var packet = oAuthPacket(stuff);

// issue request

return UrlFetchApp.fetch(url, packet);

}

/**

* return the stuff from the db associated with the e.parameter.entry value

* @param {String} siloNamethe the locker name

* @param {scriptdbinstance} db public db

* @param {queryOb} optQuery optional query by example

* @return {ContentService} the rest response

function getPubStuff (siloName, db, optQuery) {

var q;

var response = {status: {code:"bad", reason:"unknown error"}, results:null};

var ob = optQuery || {};

q= siloName ? scriptDbSilo(siloName,db).query(ob) : db.query(ob);

if (q.hasNext()) {

response.status.code = "good";

response.status.reason = siloName + " found in your stuff";

response.results = [] ;

while (q.hasNext()) {

response.results.push(q.next());

}

else {

response.status.reason = siloName + " has no data";

response.status.query = JSON.stringify(ob);

}

return response;

}

/** react to a doGet(e) to return public data

* @param {object} e as passed to doGet()

* @param {scriptdbinstance} db public db

* @return {String} the json string content

function getPubStuffContent (e,db) {

//parameters

// e.parameter.entry - optional the lockBox entry name

var content ;

var entry = e.parameter && e.parameter.entry ? decodeURIComponent(e.parameter.entry) : null;

try {

content = JSON.stringify(getPubStuff(entry,db));

}

catch (err) {

content = JSON.stringify ( { error: err } );

}

return content;

}

/** show everything in a given db

* @param {scriptdbinstance} db public db

* @return {String} the json string content

function showAll(db) {

var results = db.query({});

while (results.hasNext()) {

var result = results.next();

Logger.log(Utilities.jsonStringify(result));

}

You can find more information on this library here. For help and more information join our forum, follow the blog or follow me on twitter . Now take a look at the next step in step by step guide to delegating to Google Apps Script.

Desktop Liberation

The definitive resource for Google Apps Script and Microsoft Office automation

Using the mcpher library in your code

How to include mcpher library in your project

Add a reference to the shared library.

References

The Code