@@ -54,3 +54,4 894b8239b953c0384cf32cab46cf41dac97ea03b | |||||
54 | 63215d91ae4b711eeb2145b9685240e1afada904 v1.9.0-rc6 |
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54 | 63215d91ae4b711eeb2145b9685240e1afada904 v1.9.0-rc6 | |
55 | af4f8424e83d56e89a64f39e19514ca10dbd43c6 v1.9.0 |
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55 | af4f8424e83d56e89a64f39e19514ca10dbd43c6 v1.9.0 | |
56 | 63f3ad8e6cffcf32fc5a555e55e8544227293d4c v1.10.0 |
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56 | 63f3ad8e6cffcf32fc5a555e55e8544227293d4c v1.10.0 | |
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57 | d9c99ae7dec87ef47aded05def6a094a892df0e6 v1.10.1 |
@@ -42,19 +42,32 export const query = <T, Q, O>(store: Qu | |||||
42 | }; |
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42 | }; | |
43 | }; |
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43 | }; | |
44 |
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44 | |||
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45 | /** | |||
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46 | * Wraps the query method of the store, the resulting method takes a query | |||
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47 | * expression and returns two observable sequences. The first sequence represents | |||
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48 | * the results of the query, the second sequence provides the updates to the | |||
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49 | * query results. | |||
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50 | * | |||
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51 | * @param store The store used to query data | |||
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52 | * @param includeUpdates The flag to include item updates not only additions and | |||
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53 | * deletions. By default this flag is set to true. | |||
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54 | * @returns Two observable sequences | |||
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55 | */ | |||
45 | export const queryEx = <T, Q, O>(store: Queryable<T, Q, O>, includeUpdates = true) => |
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56 | export const queryEx = <T, Q, O>(store: Queryable<T, Q, O>, includeUpdates = true) => | |
46 | (query?: Q, options?: O): [data: QueryResults<T>, updates: QueryResults<T>] => { |
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57 | (query?: Q, options?: O): [data: QueryResults<T>, updates: QueryResults<T>] => { | |
47 |
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58 | |||
48 | const pending: T[] = []; |
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59 | /** count active observers */ | |
49 |
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60 | let listeners = 0; | ||
50 |
let results: PromiseOrValue<T[]> = |
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61 | let results: PromiseOrValue<T[]> = []; | |
51 |
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62 | |||
52 | const data = observe<OrderedUpdate<T>>(({ next, complete, error }) => { |
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63 | const data = observe<OrderedUpdate<T>>(({ next, complete, error }) => { | |
53 | const processResults = (items: T[]) => |
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64 | const processResults = (items: T[]) => | |
54 | items.forEach((item, newIndex) => next({ item, newIndex, prevIndex: -1 })); |
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65 | items.forEach((item, newIndex) => next({ item, newIndex, prevIndex: -1 })); | |
55 |
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66 | |||
56 | try { |
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67 | try { | |
57 | if (results === pending) |
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68 | // is there are no active observers here, we need to query actual | |
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69 | // data from the store. | |||
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70 | if (listeners === 0) | |||
58 | results = store.query(query, options); |
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71 | results = store.query(query, options); | |
59 |
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72 | |||
60 | if (isPromise(results)) { |
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73 | if (isPromise(results)) { | |
@@ -74,8 +87,14 export const queryEx = <T, Q, O>(store: | |||||
74 | const updates = observe<OrderedUpdate<T>>(({ next, complete, error, isClosed }) => { |
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87 | const updates = observe<OrderedUpdate<T>>(({ next, complete, error, isClosed }) => { | |
75 | try { |
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88 | try { | |
76 | if (!isClosed() && isDjObservableResults<T>(results)) { |
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89 | if (!isClosed() && isDjObservableResults<T>(results)) { | |
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90 | // subscribe fot the changes | |||
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91 | listeners++; | |||
77 | const h = results.observe((item, prevIndex, newIndex) => next({ item, prevIndex, newIndex }), includeUpdates); |
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92 | const h = results.observe((item, prevIndex, newIndex) => next({ item, prevIndex, newIndex }), includeUpdates); | |
78 |
return () => |
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93 | return () => { | |
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94 | // unsubscribe from changes | |||
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95 | listeners--; | |||
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96 | h.remove(); | |||
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97 | }; | |||
79 | } else { |
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98 | } else { | |
80 | complete(); |
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99 | complete(); | |
81 | } |
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100 | } |
@@ -170,4 +170,22 tap.test(".tap() tests", async t => { | |||||
170 |
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170 | |||
171 | t.same(side, [1,2], ".tap() should be processed synchronously"); |
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171 | t.same(side, [1, 2], ".tap() should be processed synchronously"); | |
172 |
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172 | |||
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173 | }).catch(() => { }); | |||
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174 | ||||
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175 | tap.test(".while() tests", async t => { | |||
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176 | ||||
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177 | const seq = of(1, 2, 3, 4).while(v => v <= 2); | |||
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178 | ||||
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179 | t.same(await seq.collect(), [1, 2], "Should collect only taken elements"); | |||
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180 | ||||
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181 | const data: number[] = []; | |||
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182 | let complete = 0; | |||
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183 | seq.subscribe({ | |||
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184 | next: v => data.push(v), | |||
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185 | complete: () => complete++ | |||
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186 | }); | |||
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187 | ||||
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188 | t.same(data, [1, 2], "Should receive only taken elements"); | |||
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189 | t.equal(complete, 1, "Complete should run once"); | |||
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190 | ||||
173 | }).catch(() => {}); No newline at end of file |
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191 | }).catch(() => { }); |
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