1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 | 260x 5x 255x 249x 249x 249x 45x 45x 45x 45x 394x 347x 347x 394x 50x 344x 48x 47x 44x 71x 71x 67x 48x 46x 42x 36x 35x 33x 35x 34x 32x 22x 22x 21x 45x 45x 17x 17x 17x 39x 28x 28x 20x 28x 8x 28x 4x 24x 28x 28x 120x 62x 120x 50x 120x 28x 120x 120x 120x 103x 122x 31x 10x 23x 21x 21x 31x 42x 13x 29x 42x 21x 6x 21x 6x 19x 15x 15x 21x 28x 122x 348x 329x 329x 329x 141x 141x 188x 91x 238x 238x 238x 97x 429x 141x 141x 141x 139x 4x 135x 2x 139x 238x 238x 10x 10x 10x 10x 98x 11x 36x 10x 10x 50x 50x 138x 5x 133x 138x 5x 133x 133x 67x 67x 67x 44x 68x 44x 44x 44x 29x 15x 44x 33x 33x 33x 33x 32x 32x 32x 32x 42x 42x 42x 42x 42x 21x 21x 4x 4x 3x 4x 4x 1x 3x | import { Observable } from 'rxjs/Observable' import 'rxjs/add/observable/empty' import 'rxjs/add/operator/publishReplay' import 'rxjs/add/operator/scan' import 'rxjs/add/operator/filter' import 'rxjs/add/operator/map' import 'rxjs/add/operator/toArray' import 'rxjs/add/operator/defaultIfEmpty' import 'rxjs/add/operator/ignoreElements' import 'rxjs/add/operator/merge' import 'rxjs/add/operator/mergeMap' import 'rxjs/add/operator/take' import snakeCase from 'snake-case' import deepEqual from 'deep-equal' import checkArgs from './util/check-args' import validIndexValue from './util/valid-index-value.js' import { serialize } from './serialization.js' import watchRewrites from './hacks/watch-rewrites' /** @this TermBase Validation check to throw an exception if a method is chained onto a query that already has it. It belongs to TermBase, but we don't want to pollute the objects with it (since it isn't useful to api users), so it's dynamically bound with .call inside methods that use it. */ function checkIfLegalToChain(key) { if (this._legalMethods.indexOf(key) === -1) { throw new Error(`${key} cannot be called on the current query`) } Iif (snakeCase(key) in this._query) { throw new Error(`${key} has already been called on this query`) } } // Abstract base class for terms export class TermBase { constructor(sendRequest, query, legalMethods) { this._sendRequest = sendRequest this._query = query this._legalMethods = legalMethods } toString() { let string = `Collection('${this._query.collection}')` if (this._query.find) { string += `.find(${JSON.stringify(this._query.find)})` } if (this._query.find_all) { string += `.findAll(${JSON.stringify(this._query.find_all)})` } if (this._query.order) { string += `.order(${JSON.stringify(this._query.order[0])}, ` + `${JSON.stringify(this._query.order[1])})` } if (this._query.above) { string += `.above(${JSON.stringify(this.query.above[0])}, ` + `${JSON.stringify(this.query.above[1])})` } if (this._query.below) { string += `.below(${JSON.stringify(this.query.below[0])}, ` + `${JSON.stringify(this.query.below[1])})` } if (this._query.limit) { string += '.limit(this._query.limit))' } return string } // Returns a sequence of the result set. Every time it changes the // updated sequence will be emitted. If raw change objects are // needed, pass the option 'rawChanges: true'. An observable is // returned which will lazily emit the query when it is subscribed // to watch({ rawChanges = false } = {}) { const query = watchRewrites(this, this._query) const raw = this._sendRequest('subscribe', query) Iif (rawChanges) { return raw } else { return makePresentable(raw, this._query) } } // Grab a snapshot of the current query (non-changefeed). Emits an // array with all results. An observable is returned which will // lazily emit the query when subscribed to fetch() { const raw = this._sendRequest('query', this._query).map(val => { delete val.$hz_v$ return val }) if (this._query.find) { return raw.defaultIfEmpty(null) } else { return raw.toArray() } } findAll(...fieldValues) { checkIfLegalToChain.call(this, 'findAll') checkArgs('findAll', arguments, { maxArgs: 100 }) return new FindAll(this._sendRequest, this._query, fieldValues) } find(idOrObject) { checkIfLegalToChain.call(this, 'find') checkArgs('find', arguments) return new Find(this._sendRequest, this._query, idOrObject) } order(fields, direction = 'ascending') { checkIfLegalToChain.call(this, 'order') checkArgs('order', arguments, { minArgs: 1, maxArgs: 2 }) return new Order(this._sendRequest, this._query, fields, direction) } above(aboveSpec, bound = 'closed') { checkIfLegalToChain.call(this, 'above') checkArgs('above', arguments, { minArgs: 1, maxArgs: 2 }) return new Above(this._sendRequest, this._query, aboveSpec, bound) } below(belowSpec, bound = 'open') { checkIfLegalToChain.call(this, 'below') checkArgs('below', arguments, { minArgs: 1, maxArgs: 2 }) return new Below(this._sendRequest, this._query, belowSpec, bound) } limit(size) { checkIfLegalToChain.call(this, 'limit') checkArgs('limit', arguments) return new Limit(this._sendRequest, this._query, size) } } // Turn a raw observable of server responses into user-presentable events // // `observable` is the base observable with full responses coming from // the HorizonSocket // `query` is the value of `options` in the request function makePresentable(observable, query) { // Whether the entire data structure is in each change const pointQuery = Boolean(query.find) if (pointQuery) { let hasEmitted = false const seedVal = null // Simplest case: just pass through new_val return observable .filter(change => !hasEmitted || change.type !== 'state') .scan((previous, change) => { hasEmitted = true if (change.new_val != null) { delete change.new_val.$hz_v$ } if (change.old_val != null) { delete change.old_val.$hz_v$ } if (change.state === 'synced') { return previous } else { return change.new_val } }, seedVal) } else { const seedVal = { emitted: false, val: [] } return observable .scan((state, change) => { if (change.new_val != null) { delete change.new_val.$hz_v$ } if (change.old_val != null) { delete change.old_val.$hz_v$ } if (change.state === 'synced') { state.emitted = true } state.val = applyChange(state.val.slice(), change) return state }, seedVal) .filter(state => state.emitted) .map(x => x.val) } } export function applyChange(arr, change) { switch (change.type) { case 'remove': case 'uninitial': { // Remove old values from the array if (change.old_offset != null) { arr.splice(change.old_offset, 1) } else { const index = arr.findIndex(x => deepEqual(x.id, change.old_val.id)) Iif (index === -1) { // Programming error. This should not happen throw new Error( `change couldn't be applied: ${JSON.stringify(change)}`) } arr.splice(index, 1) } break } case 'add': case 'initial': { // Add new values to the array if (change.new_offset != null) { // If we have an offset, put it in the correct location arr.splice(change.new_offset, 0, change.new_val) } else { // otherwise for unordered results, push it on the end arr.push(change.new_val) } break } case 'change': { // Modify in place if a change is happening if (change.old_offset != null) { // Remove the old document from the results arr.splice(change.old_offset, 1) } if (change.new_offset != null) { // Splice in the new val if we have an offset arr.splice(change.new_offset, 0, change.new_val) } else { // If we don't have an offset, find the old val and // replace it with the new val const index = arr.findIndex(x => deepEqual(x.id, change.old_val.id)) Iif (index === -1) { // indicates a programming bug. The server gives us the // ordering, so if we don't find the id it means something is // buggy. throw new Error( `change couldn't be applied: ${JSON.stringify(change)}`) } arr[index] = change.new_val } break } case 'state': { // This gets hit if we have not emitted yet, and should // result in an empty array being output. break } default: throw new Error( `unrecognized 'type' field from server ${JSON.stringify(change)}`) } return arr } /** @this Collection Implements writeOps for the Collection class */ function writeOp(name, args, documents) { checkArgs(name, args) let isBatch = true let wrappedDocs = documents if (!Array.isArray(documents)) { // Wrap in an array if we need to wrappedDocs = [ documents ] isBatch = false } else if (documents.length === 0) { // Don't bother sending no-ops to the server return Observable.empty() } const options = Object.assign( {}, this._query, { data: serialize(wrappedDocs) }) let observable = this._sendRequest(name, options) if (isBatch) { // If this is a batch writeOp, each document may succeed or fail // individually. observable = observable.map( resp => resp.error ? new Error(resp.error) : resp) } else { // If this is a single writeOp, the entire operation should fail // if any fails. const _prevOb = observable observable = Observable.create(subscriber => { _prevOb.subscribe({ next(resp) { if (resp.error) { // TODO: handle error ids when we get them subscriber.error(new Error(resp.error)) } else { subscriber.next(resp) } }, error(err) { subscriber.error(err) }, complete() { subscriber.complete() }, }) }) } Iif (!this._lazyWrites) { // Need to buffer response since this becomes a hot observable and // when we subscribe matters observable = observable.publishReplay().refCount() observable.subscribe() } return observable } export class Collection extends TermBase { constructor(sendRequest, collectionName, lazyWrites) { const query = { collection: collectionName } const legalMethods = [ 'find', 'findAll', 'order', 'above', 'below', 'limit' ] super(sendRequest, query, legalMethods) this._lazyWrites = lazyWrites } store(documents) { return writeOp.call(this, 'store', arguments, documents) } upsert(documents) { return writeOp.call(this, 'upsert', arguments, documents) } insert(documents) { return writeOp.call(this, 'insert', arguments, documents) } replace(documents) { return writeOp.call(this, 'replace', arguments, documents) } update(documents) { return writeOp.call(this, 'update', arguments, documents) } remove(documentOrId) { const wrapped = validIndexValue(documentOrId) ? { id: documentOrId } : documentOrId return writeOp.call(this, 'remove', arguments, wrapped) } removeAll(documentsOrIds) { if (!Array.isArray(documentsOrIds)) { throw new Error('removeAll takes an array as an argument') } const wrapped = documentsOrIds.map(item => { if (validIndexValue(item)) { return { id: item } } else { return item } }) return writeOp.call(this, 'removeAll', arguments, wrapped) } } export class Find extends TermBase { constructor(sendRequest, previousQuery, idOrObject) { const findObject = validIndexValue(idOrObject) ? { id: idOrObject } : idOrObject const query = Object.assign({}, previousQuery, { find: findObject }) super(sendRequest, query, []) } } export class FindAll extends TermBase { constructor(sendRequest, previousQuery, fieldValues) { const wrappedFields = fieldValues .map(item => validIndexValue(item) ? { id: item } : item) const options = { find_all: wrappedFields } const findAllQuery = Object.assign({}, previousQuery, options) let legalMethods if (wrappedFields.length === 1) { legalMethods = [ 'order', 'above', 'below', 'limit' ] } else { // The vararg version of findAll cannot have anything chained to it legalMethods = [] } super(sendRequest, findAllQuery, legalMethods) } } export class Above extends TermBase { constructor(sendRequest, previousQuery, aboveSpec, bound) { const option = { above: [ aboveSpec, bound ] } const query = Object.assign({}, previousQuery, option) const legalMethods = [ 'findAll', 'order', 'below', 'limit' ] super(sendRequest, query, legalMethods) } } export class Below extends TermBase { constructor(sendRequest, previousQuery, belowSpec, bound) { const options = { below: [ belowSpec, bound ] } const query = Object.assign({}, previousQuery, options) const legalMethods = [ 'findAll', 'order', 'above', 'limit' ] super(sendRequest, query, legalMethods) } } export class Order extends TermBase { constructor(sendRequest, previousQuery, fields, direction) { const wrappedFields = Array.isArray(fields) ? fields : [ fields ] const options = { order: [ wrappedFields, direction ] } const query = Object.assign({}, previousQuery, options) const legalMethods = [ 'findAll', 'above', 'below', 'limit' ] super(sendRequest, query, legalMethods) } } export class Limit extends TermBase { constructor(sendRequest, previousQuery, size) { const query = Object.assign({}, previousQuery, { limit: size }) // Nothing is legal to chain after .limit super(sendRequest, query, []) } } export class UserDataTerm { constructor(hz, handshake, socket) { this._hz = hz this._before = socket.ignoreElements().merge(handshake) } _query(userId) { return this._hz('users').find(userId) } fetch() { return this._before.mergeMap(handshake => { if (handshake.id == null) { throw new Error('Unauthenticated users have no user document') } else { return this._query(handshake.id).fetch() } }).take(1) // necessary so that we complete, since _before is // infinite } watch(...args) { return this._before.mergeMap(handshake => { if (handshake.id === null) { throw new Error('Unauthenticated users have no user document') } else { return this._query(handshake.id).watch(...args) } }) } } |