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# SendViewController
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**THIS IS A WORK-IN-PROGRESS-DOCUMENT**, it may be confusing
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This is the compose screen.
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## external states
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have a look at the SendViewDelegate, if you want to interact with these states.
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### input states
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it can be called with
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* no prefilled Mail a.k.a create a new Mail (from Inbox)
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* a invitation Mail (from ReadView, ContactView, SendView)
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- hide invite button then
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* warning Mail as a reaction to an insecure warning (ReadView) (getting a postcard from a contact, who sent letters before)
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* draft Mail (from ReadView)
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if the sendView is called you may set the attributes
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* prefilledMail
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the contents of this mail will be set in the sendView
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* invite
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the composed mail will be a invite mail. We will show the invite button (in the menu of the iconButton [navigationBar]) in the sendView if this value is false and a postcard is composed.
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* sendViewDelegate
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important for reaction to output states
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* enforcePostcard
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even if there are only recipients with known keys present send a postcard to everybody. This value may be changed by user while editing the composition
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### output states
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have a look at the SendViewDelegate, if you want to interact with these states.
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the state after composing is one of the following:
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* composition is discarded
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* composition is saved as draft
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- saved as letter
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- saved as postcard
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* composition is sent
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- sent as letter
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- sent as postcard
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## internal states
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| ... | ... | |
