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< h1 id = "behaviour-builder" > Behaviour Builder< a class = "headerlink" href = "#behaviour-builder" title = "Permanent link" > ¶ < / a > < / h1 >
< p > In the previous pages about < a href = "https://bookstack.inmo.dev/books/telegrambotapi/page/updates-with-flows" > updates handling< / a > and was mentioned that currently in the most cases you should use < a href = "https://kotlinlang.org/docs/flow.html" > Flow< / a > s. So, there is an improvement for that system which hide direct work with flows and allow you to create more declarative logic of your bot.< / p >
< h2 id = "main-parts-of-behaviour-builder" > Main parts of Behaviour Builder< a class = "headerlink" href = "#main-parts-of-behaviour-builder" title = "Permanent link" > ¶ < / a > < / h2 >
< p > There are several things you should know for better understanding of behaviour builder:< / p >
< ul >
< li > < a href = "https://github.com/InsanusMokrassar/TelegramBotAPI/blob/master/tgbotapi.behaviour_builder/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourContext.kt#L33" > BehaviourContext< / a > - it is the thing which contains all necessary tools for working with bots< / li >
< li > < a href = "https://tgbotapi.inmo.dev/docs/dev.inmo.tgbotapi.extensions.behaviour_builder.triggers_handling/index.html" > Triggers< / a > - < code > on*< / code > extensions for < code > BehaviourContext< / code > which allow you to create reaction on some update< / li >
< li > < a href = "https://tgbotapi.inmo.dev/docs/dev.inmo.tgbotapi.extensions.behaviour_builder.expectations/index.html" > Expectations< / a > (or waiters) - < code > wait*< / code > extensions which you < strong > may< / strong > use in < a href = "https://tgbotapi.inmo.dev/docs/dev.inmo.tgbotapi.extensions.behaviour_builder/build-behaviour.html" > buildBehaviour< / a > function, but < strong > < em > it is recommended< / em > < / strong > to use it in bodies of triggers< / li >
< / ul >
< h2 id = "initialization" > Initialization< a class = "headerlink" href = "#initialization" title = "Permanent link" > ¶ < / a > < / h2 >
< p > As was said above, there is < a href = "https://tgbotapi.inmo.dev/docs/dev.inmo.tgbotapi.extensions.behaviour_builder/build-behaviour.html" > buildBehaviour< / a > function which allow you set up your bot logic. Let’ s see an example:< / p >
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< div class = "language-kotlin highlight" > < pre > < span > < / span > < code > < span id = "__span-0-1" > < a id = "__codelineno-0-1" name = "__codelineno-0-1" href = "#__codelineno-0-1" > < / a > < span class = "kd" > val< / span > < span class = "w" > < / span > < span class = "nv" > bot< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > telegramBot< / span > < span class = "p" > (< / span > < span class = "s" > " TOKEN" < / span > < span class = "p" > )< / span >
< / span > < span id = "__span-0-2" > < a id = "__codelineno-0-2" name = "__codelineno-0-2" href = "#__codelineno-0-2" > < / a >
< / span > < span id = "__span-0-3" > < a id = "__codelineno-0-3" name = "__codelineno-0-3" href = "#__codelineno-0-3" > < / a > < span class = "n" > bot< / span > < span class = "p" > .< / span > < span class = "na" > buildBehaviour< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< / span > < span id = "__span-0-4" > < a id = "__codelineno-0-4" name = "__codelineno-0-4" href = "#__codelineno-0-4" > < / a > < span class = "w" > < / span > < span class = "n" > onCommand< / span > < span class = "p" > (< / span > < span class = "s" > " start" < / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span > < span class = "w" > < / span > < span class = "c1" > // creating of trigger< / span >
< / span > < span id = "__span-0-5" > < a id = "__codelineno-0-5" name = "__codelineno-0-5" href = "#__codelineno-0-5" > < / a > < span class = "w" > < / span > < span class = "kd" > val< / span > < span class = "w" > < / span > < span class = "nv" > message< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "nb" > it< / span >
< / span > < span id = "__span-0-6" > < a id = "__codelineno-0-6" name = "__codelineno-0-6" href = "#__codelineno-0-6" > < / a > < span class = "w" > < / span > < span class = "kd" > val< / span > < span class = "w" > < / span > < span class = "nv" > content< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > message< / span > < span class = "p" > .< / span > < span class = "na" > content< / span >
< / span > < span id = "__span-0-7" > < a id = "__codelineno-0-7" name = "__codelineno-0-7" href = "#__codelineno-0-7" > < / a >
< / span > < span id = "__span-0-8" > < a id = "__codelineno-0-8" name = "__codelineno-0-8" href = "#__codelineno-0-8" > < / a > < span class = "w" > < / span > < span class = "n" > reply< / span > < span class = "p" > (< / span > < span class = "n" > message< / span > < span class = "p" > ,< / span > < span class = "w" > < / span > < span class = "s" > " Ok, send me one photo" < / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "c1" > // send text message with replying on incoming message< / span >
< / span > < span id = "__span-0-9" > < a id = "__codelineno-0-9" name = "__codelineno-0-9" href = "#__codelineno-0-9" > < / a >
< / span > < span id = "__span-0-10" > < a id = "__codelineno-0-10" name = "__codelineno-0-10" href = "#__codelineno-0-10" > < / a > < span class = "w" > < / span > < span class = "kd" > val< / span > < span class = "w" > < / span > < span class = "nv" > photoContent< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > waitPhoto< / span > < span class = "p" > ().< / span > < span class = "na" > first< / span > < span class = "p" > ()< / span > < span class = "w" > < / span > < span class = "c1" > // waitPhoto will return List, so, get first element< / span >
< / span > < span id = "__span-0-11" > < a id = "__codelineno-0-11" name = "__codelineno-0-11" href = "#__codelineno-0-11" > < / a >
< / span > < span id = "__span-0-12" > < a id = "__codelineno-0-12" name = "__codelineno-0-12" href = "#__codelineno-0-12" > < / a > < span class = "w" > < / span > < span class = "kd" > val< / span > < span class = "w" > < / span > < span class = "nv" > photo< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > downloadFile< / span > < span class = "p" > (< / span > < span class = "n" > photoContent< / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "c1" > // ByteArray of photo< / span >
< / span > < span id = "__span-0-13" > < a id = "__codelineno-0-13" name = "__codelineno-0-13" href = "#__codelineno-0-13" > < / a >
< / span > < span id = "__span-0-14" > < a id = "__codelineno-0-14" name = "__codelineno-0-14" href = "#__codelineno-0-14" > < / a > < span class = "w" > < / span > < span class = "c1" > // some logic with saving of photos< / span >
< / span > < span id = "__span-0-15" > < a id = "__codelineno-0-15" name = "__codelineno-0-15" href = "#__codelineno-0-15" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< / span > < span id = "__span-0-16" > < a id = "__codelineno-0-16" name = "__codelineno-0-16" href = "#__codelineno-0-16" > < / a > < span class = "p" > }< / span >
< / span > < / code > < / pre > < / div >
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< h2 id = "filters" > Filters< a class = "headerlink" href = "#filters" title = "Permanent link" > ¶ < / a > < / h2 >
< p > In most cases there are opportunity to filter some of messages before starting of main logic. Let’ s look at this using the example above:< / p >
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< div class = "language-kotlin highlight" > < pre > < span > < / span > < code > < span id = "__span-1-1" > < a id = "__codelineno-1-1" name = "__codelineno-1-1" href = "#__codelineno-1-1" > < / a > < span class = "kd" > val< / span > < span class = "w" > < / span > < span class = "nv" > bot< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > telegramBot< / span > < span class = "p" > (< / span > < span class = "s" > " TOKEN" < / span > < span class = "p" > )< / span >
< / span > < span id = "__span-1-2" > < a id = "__codelineno-1-2" name = "__codelineno-1-2" href = "#__codelineno-1-2" > < / a >
< / span > < span id = "__span-1-3" > < a id = "__codelineno-1-3" name = "__codelineno-1-3" href = "#__codelineno-1-3" > < / a > < span class = "n" > bot< / span > < span class = "p" > .< / span > < span class = "na" > buildBehaviour< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< / span > < span id = "__span-1-4" > < a id = "__codelineno-1-4" name = "__codelineno-1-4" href = "#__codelineno-1-4" > < / a > < span class = "w" > < / span > < span class = "n" > onCommand< / span > < span class = "p" > (< / span >
< / span > < span id = "__span-1-5" > < a id = "__codelineno-1-5" name = "__codelineno-1-5" href = "#__codelineno-1-5" > < / a > < span class = "w" > < / span > < span class = "s" > " start" < / span > < span class = "p" > ,< / span >
< / span > < span id = "__span-1-6" > < a id = "__codelineno-1-6" name = "__codelineno-1-6" href = "#__codelineno-1-6" > < / a > < span class = "w" > < / span > < span class = "n" > initialFilter< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< / span > < span id = "__span-1-7" > < a id = "__codelineno-1-7" name = "__codelineno-1-7" href = "#__codelineno-1-7" > < / a > < span class = "w" > < / span > < span class = "nb" > it< / span > < span class = "p" > .< / span > < span class = "na" > content< / span > < span class = "p" > .< / span > < span class = "na" > textSources< / span > < span class = "p" > .< / span > < span class = "na" > size< / span > < span class = "w" > < / span > < span class = "o" > ==< / span > < span class = "w" > < / span > < span class = "m" > 1< / span > < span class = "w" > < / span > < span class = "c1" > // make sure that user has sent /start without any additions< / span >
< / span > < span id = "__span-1-8" > < a id = "__codelineno-1-8" name = "__codelineno-1-8" href = "#__codelineno-1-8" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< / span > < span id = "__span-1-9" > < a id = "__codelineno-1-9" name = "__codelineno-1-9" href = "#__codelineno-1-9" > < / a > < span class = "w" > < / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< / span > < span id = "__span-1-10" > < a id = "__codelineno-1-10" name = "__codelineno-1-10" href = "#__codelineno-1-10" > < / a > < span class = "w" > < / span > < span class = "c1" > // ...< / span >
< / span > < span id = "__span-1-11" > < a id = "__codelineno-1-11" name = "__codelineno-1-11" href = "#__codelineno-1-11" > < / a > < span class = "w" > < / span > < span class = "p" > }< / span >
< / span > < span id = "__span-1-12" > < a id = "__codelineno-1-12" name = "__codelineno-1-12" href = "#__codelineno-1-12" > < / a > < span class = "p" > }< / span >
< / span > < / code > < / pre > < / div >
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< p > OR< / p >
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< div class = "language-kotlin highlight" > < pre > < span > < / span > < code > < span id = "__span-2-1" > < a id = "__codelineno-2-1" name = "__codelineno-2-1" href = "#__codelineno-2-1" > < / a > < span class = "kd" > val< / span > < span class = "w" > < / span > < span class = "nv" > bot< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "n" > telegramBot< / span > < span class = "p" > (< / span > < span class = "s" > " TOKEN" < / span > < span class = "p" > )< / span >
< / span > < span id = "__span-2-2" > < a id = "__codelineno-2-2" name = "__codelineno-2-2" href = "#__codelineno-2-2" > < / a >
< / span > < span id = "__span-2-3" > < a id = "__codelineno-2-3" name = "__codelineno-2-3" href = "#__codelineno-2-3" > < / a > < span class = "n" > bot< / span > < span class = "p" > .< / span > < span class = "na" > buildBehaviour< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< / span > < span id = "__span-2-4" > < a id = "__codelineno-2-4" name = "__codelineno-2-4" href = "#__codelineno-2-4" > < / a > < span class = "w" > < / span > < span class = "n" > onCommand< / span > < span class = "p" > (< / span >
< / span > < span id = "__span-2-5" > < a id = "__codelineno-2-5" name = "__codelineno-2-5" href = "#__codelineno-2-5" > < / a > < span class = "w" > < / span > < span class = "s" > " start" < / span > < span class = "p" > ,< / span >
< / span > < span id = "__span-2-6" > < a id = "__codelineno-2-6" name = "__codelineno-2-6" href = "#__codelineno-2-6" > < / a > < span class = "w" > < / span > < span class = "n" > requireOnlyCommandInMessage< / span > < span class = "w" > < / span > < span class = "o" > =< / span > < span class = "w" > < / span > < span class = "kc" > true< / span > < span class = "w" > < / span > < span class = "c1" > // it is default, but you can overwrite it with `requireOnlyCommandInMessage = false`< / span >
< / span > < span id = "__span-2-7" > < a id = "__codelineno-2-7" name = "__codelineno-2-7" href = "#__codelineno-2-7" > < / a > < span class = "w" > < / span > < span class = "p" > )< / span > < span class = "w" > < / span > < span class = "p" > {< / span >
< / span > < span id = "__span-2-8" > < a id = "__codelineno-2-8" name = "__codelineno-2-8" href = "#__codelineno-2-8" > < / a > < span class = "w" > < / span > < span class = "c1" > // ...< / span >
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2023-06-09 20:03:53 +00:00
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