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tgbotapi/docs/dev.inmo.tgbotapi.extensions.behaviour_builder.expectations/expect-one.html
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<div class="main-content" id="content" pageIds="docs::dev.inmo.tgbotapi.extensions.behaviour_builder.expectations//expectOne/dev.inmo.tgbotapi.updateshandlers.FlowsUpdatesFilter#dev.inmo.tgbotapi.bot.RequestsExecutor#dev.inmo.tgbotapi.requests.abstracts.Request[*]?#kotlin.coroutines.SuspendFunction1[dev.inmo.tgbotapi.types.update.abstracts.Update,dev.inmo.tgbotapi.requests.abstracts.Request[*]?]#kotlin.coroutines.SuspendFunction1[dev.inmo.tgbotapi.types.update.abstracts.Update,dev.inmo.tgbotapi.requests.abstracts.Request[*]?]#kotlin.coroutines.SuspendFunction1[dev.inmo.tgbotapi.types.update.abstracts.Update,kotlin.Boolean]#kotlin.coroutines.SuspendFunction1[dev.inmo.tgbotapi.types.update.abstracts.Update,TypeParam(bounds=[kotlin.Any?])?]/PointingToDeclaration//-1982836883">
<div class="breadcrumbs"><a href="../../index.html">docs</a><span class="delimiter">/</span><a href="index.html">dev.inmo.tgbotapi.extensions.behaviour_builder.expectations</a><span class="delimiter">/</span><span class="current">expectOne</span></div>
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<h1 class="cover"><span>expect</span><wbr></wbr><span><span>One</span></span></h1>
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<div class="platform-hinted " data-platform-hinted="data-platform-hinted"><div class="content sourceset-dependent-content" data-active="" data-togglable=":docs:dokkaHtml/commonMain"><div class="symbol monospace"><span class="token keyword">suspend </span><span class="token keyword">fun </span><span class="token operator">&lt;</span><span class="token keyword"></span><a href="expect-one.html">T</a><span class="token operator">&gt; </span><a href="../dev.inmo.tgbotapi.updateshandlers/-flows-updates-filter/index.html">FlowsUpdatesFilter</a><span class="token punctuation">.</span><a href="expect-one.html"><span class="token function">expectOne</span></a><span class="token punctuation">(</span><span class="parameters "><span class="parameter ">bot<span class="token operator">: </span><a href="../dev.inmo.tgbotapi.bot/index.html#-1167693203%2FClasslikes%2F-1982836883">TelegramBot</a><span class="token punctuation">, </span></span><span class="parameter ">initRequest<span class="token operator">: </span><a href="../dev.inmo.tgbotapi.requests.abstracts/-request/index.html">Request</a><span class="token operator">&lt;</span><span class="token operator">*</span><span class="token operator">&gt;</span><span class="token operator">?</span><span class="token operator"> = </span>null<span class="token punctuation">, </span></span><span class="parameter ">errorFactory<span class="token operator">: </span><a href="index.html#278660993%2FClasslikes%2F-1982836883">NullableRequestBuilder</a><span class="token operator">&lt;</span><span class="token operator">*</span><span class="token operator">&gt;</span><span class="token operator"> = </span>{ null }<span class="token punctuation">, </span></span><span class="parameter ">cancelRequestFactory<span class="token operator">: </span><a href="index.html#278660993%2FClasslikes%2F-1982836883">NullableRequestBuilder</a><span class="token operator">&lt;</span><span class="token operator">*</span><span class="token operator">&gt;</span><span class="token operator"> = </span>{ null }<span class="token punctuation">, </span></span><span class="parameter ">cancelTrigger<span class="token operator">: </span><span class="token keyword">suspend </span><span class="token punctuation">(</span><span class="token keyword"></span><a href="../dev.inmo.tgbotapi.types.update.abstracts/-update/index.html">Update</a><span class="token punctuation">)</span><span class="token operator"> -&gt; </span><span class="token keyword"></span><a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html">Boolean</a><span class="token operator"> = </span>{ cancelRequestFactory(it) != null }<span class="token punctuation">, </span></span><span class="parameter ">filter<span class="token operator">: </span><span class="token keyword">suspend </span><span class="token punctuation">(</span><span class="token keyword"></span><a href="../dev.inmo.tgbotapi.types.update.abstracts/-update/index.html">Update</a><span class="token punctuation">)</span><span class="token operator"> -&gt; </span><span class="token keyword"></span><a href="expect-one.html">T</a><span class="token operator">?</span></span></span><span class="token punctuation">)</span><span class="token operator">: </span><a href="expect-one.html">T</a></div><h4 class="">Parameters</h4><div data-togglable="Parameters"><div class="table" data-togglable="Parameters"><div class="table-row" data-filterable-current=":docs:dokkaHtml/commonMain" data-filterable-set=":docs:dokkaHtml/commonMain"><div class="main-subrow keyValue WithExtraAttributes"><div class=""><span class="inline-flex"><div><u><span>init</span><wbr></wbr><span><span>Request</span></span></u></div></span></div><div><div class="title"><div data-togglable="Parameters"><p class="paragraph">If not null, this request will be sent by <a href="expect-one.html">bot</a> before returning value</p></div></div></div></div></div><div class="table-row" data-filterable-current=":docs:dokkaHtml/commonMain" data-filterable-set=":docs:dokkaHtml/commonMain"><div class="main-subrow keyValue WithExtraAttributes"><div class=""><span class="inline-flex"><div><u><span>error</span><wbr></wbr><span><span>Factory</span></span></u></div></span></div><div><div class="title"><div data-togglable="Parameters"><p class="paragraph">If set, this factory will be used to produce requests in case when user have sent incorrect data</p></div></div></div></div></div><div class="table-row" data-filterable-current=":docs:dokkaHtml/commonMain" data-filterable-set=":docs:dokkaHtml/commonMain"><div class="main-subrow keyValue WithExtraAttributes"><div class=""><span class="inline-flex"><div><u><span>cancel</span><wbr></wbr><span>Request</span><wbr></wbr><span><span>Factory</span></span></u></div></span></div><div><div class="title"><div data-togglable="Parameters"><p class="paragraph">If set, this factory will be used to produce requests in case when it is required to say user that chain of scenario has been cancelled</p></div></div></div></div></div><div class="table-row" data-filterable-current=":docs:dokkaHtml/commonMain" data-filterable-set=":docs:dokkaHtml/commonMain"><div class="main-subrow keyValue WithExtraAttributes"><div class=""><span class="inline-flex"><div><u><span>cancel</span><wbr></wbr><span><span>Trigger</span></span></u></div></span></div><div><div class="title"><div data-togglable="Parameters"><p class="paragraph">When this trigger returns true, chain is cancelled</p></div></div></div></div></div><div class="table-row" data-filterable-current=":docs:dokkaHtml/commonMain" data-filterable-set=":docs:dokkaHtml/commonMain"><div class="main-subrow keyValue WithExtraAttributes"><div class=""><span class="inline-flex"><div><u><span><span>filter</span></span></u></div></span></div><div><div class="title"><div data-togglable="Parameters"><p class="paragraph">It is main param, which will be called on each update. When it return not null, result will be returned as is, but when it returns null, then will be called <a href="expect-one.html">cancelTrigger</a> (if it will return true - <a href="expect-one.html">cancelRequestFactory</a> will be called too), <a href="expect-one.html">errorFactory</a> and then will be returned null</p></div></div></div></div></div></div></div><hr><div class="symbol monospace"><span class="token keyword">suspend </span><span class="token keyword">fun </span><span class="token operator">&lt;</span><span class="token keyword"></span><a href="expect-one.html">T</a><span class="token operator">&gt; </span><a href="../dev.inmo.tgbotapi.extensions.behaviour_builder/-behaviour-context/index.html">BehaviourContext</a><span class="token punctuation">.</span><a href="expect-one.html"><span class="token function">expectOne</span></a><span class="token punctuation">(</span><span class="parameters "><span class="parameter ">initRequest<span class="token operator">: </span><a href="../dev.inmo.tgbotapi.requests.abstracts/-request/index.html">Request</a><span class="token operator">&lt;</span><span class="token operator">*</span><span class="token operator">&gt;</span><span class="token operator">?</span><span class="token operator"> = </span>null<span class="token punctuation">, </span></span><span class="parameter ">errorFactory<span class="token operator">: </span><a href="index.html#278660993%2FClasslikes%2F-1982836883">NullableRequestBuilder</a><span class="token operator">&lt;</span><span class="token operator">*</span><span class="token operator">&gt;</span><span class="token operator"> = </span>{ null }<span class="token punctuation">, </span></span><span class="parameter ">cancelRequestFactory<span class="token operator">: </span><a href="index.html#278660993%2FClasslikes%2F-1982836883">NullableRequestBuilder</a><span class="token operator">&lt;</span><span class="token operator">*</span><span class="token operator">&gt;</span><span class="token operator"> = </span>{ null }<span class="token punctuation">, </span></span><span class="parameter ">cancelTrigger<span class="token operator">: </span><span class="token keyword">suspend </span><span class="token punctuation">(</span><span class="token keyword"></span><a href="../dev.inmo.tgbotapi.types.update.abstracts/-update/index.html">Update</a><span class="token punctuation">)</span><span class="token operator"> -&gt; </span><span class="token keyword"></span><a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html">Boolean</a><span class="token operator"> = </span>{ cancelRequestFactory(it) != null }<span class="token punctuation">, </span></span><span class="parameter ">filter<span class="token operator">: </span><span class="token keyword">suspend </span><span class="token punctuation">(</span><span class="token keyword"></span><a href="../dev.inmo.tgbotapi.types.update.abstracts/-update/index.html">Update</a><span class="token punctuation">)</span><span class="token operator"> -&gt; </span><span class="token keyword"></span><a href="expect-one.html">T</a><span class="token operator">?</span></span></span><span class="token punctuation">)</span><span class="token operator">: </span><a href="expect-one.html">T</a></div><h4 class="">Parameters</h4><div data-togglable="Parameters"><div class="table" data-togglable="Parameters"><div class="table-row" data-filterable-current=":docs:dokkaHtml/commonMain" data-filterable-set=":docs:dokkaHtml/commonMain"><div class="main-subrow keyValue WithExtraAttributes"><div class=""><span class="inline-flex"><div><u><span>init</span><wbr></wbr><span><span>Request</span></span></u></div></span></div><div><div class="title"><div data-togglable="Parameters"><p class="paragraph">If not null, this request will be sent by bot before returning value</p></div></div></div></div></div><div class="table-row" data-filterable-current=":docs:dokkaHtml/commonMain" data-filterable-set=":docs:dokkaHtml/commonMain"><div class="main-subrow keyValue WithExtraAttributes"><div class=""><span class="inline-flex"><div><u><span>error</span><wbr></wbr><span><span>Factory</span></span></u></div></span></div><div><div class="title"><div data-togglable="Parameters"><p class="paragraph">If set, this factory will be used to produce requests in case when user have sent incorrect data</p></div></div></div></div></div><div class="table-row" data-filterable-current=":docs:dokkaHtml/commonMain" data-filterable-set=":docs:dokkaHtml/commonMain"><div class="main-subrow keyValue WithExtraAttributes"><div class=""><span class="inline-flex"><div><u><span>cancel</span><wbr></wbr><span>Request</span><wbr></wbr><span><span>Factory</span></span></u></div></span></div><div><div class="title"><div data-togglable="Parameters"><p class="paragraph">If set, this factory will be used to produce requests in case when it is required to say user that chain of scenario has been cancelled</p></div></div></div></div></div><div class="table-row" data-filterable-current=":docs:dokkaHtml/commonMain" data-filterable-set=":docs:dokkaHtml/commonMain"><div class="main-subrow keyValue WithExtraAttributes"><div class=""><span class="inline-flex"><div><u><span>cancel</span><wbr></wbr><span><span>Trigger</span></span></u></div></span></div><div><div class="title"><div data-togglable="Parameters"><p class="paragraph">When this trigger returns true, chain is cancelled</p></div></div></div></div></div><div class="table-row" data-filterable-current=":docs:dokkaHtml/commonMain" data-filterable-set=":docs:dokkaHtml/commonMain"><div class="main-subrow keyValue WithExtraAttributes"><div class=""><span class="inline-flex"><div><u><span><span>filter</span></span></u></div></span></div><div><div class="title"><div data-togglable="Parameters"><p class="paragraph">It is main param, which will be called on each update. When it return not null, result will be returned as is, but when it returns null, then will be called <a href="expect-one.html">cancelTrigger</a> (if it will return true - <a href="expect-one.html">cancelRequestFactory</a> will be called too), <a href="expect-one.html">errorFactory</a> and then will be returned null</p></div></div></div></div></div></div></div></div></div>
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