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path: root/schist_desktop_gui/src/gui/components/transactions_view.rs
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use iced::{
    alignment,
    widget::{column, row, Container},
    Element, Length,
};

use schist_models::{Account, AccountTransfer, Bucket, Transaction};

use crate::{
    gui::components::{
        AccountNavigationEntry, Navigation, NewTransactionForm, TransactionsTable, navigation, new_transaction_form, transactions_table
    }, style::SPACING_LG, traits::{Component, Viewable},
};

#[derive(Clone, Debug)]
pub struct TransactionsView {
    navigation: Navigation<AccountNavigationEntry>,
    new_transaction_form: NewTransactionForm,
    transactions_table: TransactionsTable,
}

#[derive(Clone, Debug)]
pub enum Message {
    NavigationMessage(navigation::Message<AccountNavigationEntry>),
    NewTransactionFormMessage(new_transaction_form::Message),
    SelectNextAccount,
    SelectPrevAccount,
    SetAccounts(Vec<Account>),
    SetAccountTransfers(Vec<AccountTransfer>),
    SetBuckets(Vec<Bucket>),
    SetTransactions(Vec<Transaction>),
    TransactionsTableMessage(transactions_table::Message),
}

pub enum Action {
    None,
}

impl TransactionsView {
    pub fn new(
        accounts: &[Account],
        account_transfers: &[AccountTransfer],
        buckets: &[Bucket],
        transactions: &[Transaction],
    ) -> Self {
        let account_navigation_entries: Vec<AccountNavigationEntry> = accounts
            .iter()
            .cloned()
            .map(AccountNavigationEntry::new)
            .collect();
        let active_nav_entry = account_navigation_entries.first().cloned();
        let navigation = Navigation::new(
            active_nav_entry.clone(), account_navigation_entries);
        let transactions_table =
            TransactionsTable::new(accounts, &active_nav_entry.map(|entry| entry.account), account_transfers, buckets, transactions);
        Self {
            navigation: navigation,
            new_transaction_form: NewTransactionForm::new(),
            transactions_table,
        }
    }
}

impl<'a> Component<'a, Message, Action> for TransactionsView {
    fn update(&mut self, message: Message) -> Action {
        match message {
            Message::NavigationMessage(message) => self.update_navigation(message),

            Message::TransactionsTableMessage(message) => self.update_transactions_table(message),

            Message::NewTransactionFormMessage(message) => self.update_new_transaction_form(message),

            Message::SetAccounts(accounts) => {
                let action_1 = self.update_transactions_table(
                    transactions_table::Message::SetAccounts(accounts.clone()));

                let account_navigation_entries: Vec<AccountNavigationEntry> = accounts
                    .into_iter()
                    .map(AccountNavigationEntry::new)
                    .collect();
                let action_2 = self.update_navigation(navigation::Message::SetOptions(account_navigation_entries));

                match (action_1, action_2) {
                    (Action::None, Action::None) => Action::None
                }
            }

            Message::SetAccountTransfers(account_transfers) => {
                self.update_transactions_table(
                    transactions_table::Message::SetAccountTransfers(account_transfers.clone()))
            }

            Message::SetBuckets(buckets) => {
                self.update_transactions_table(
                    transactions_table::Message::SetBuckets(buckets.clone()))
            }

            Message::SetTransactions(transactions) => {
                self.update_transactions_table(
                    transactions_table::Message::SetTransactions(transactions.clone()))
            }

            Message::SelectNextAccount => self.update_navigation(navigation::Message::SelectNext),

            Message::SelectPrevAccount => self.update_navigation(navigation::Message::SelectPrev),
        }
    }
}

impl TransactionsView {
    fn update_navigation(
        &mut self,
        message: navigation::Message<AccountNavigationEntry>,
    ) -> Action {
        match self.navigation.update(message) {
            navigation::Action::ActivateOption(option) | navigation::Action::SelectOption(option) => {
                self.update_transactions_table(transactions_table::Message::SetActiveAccount(option.account))
            }
            navigation::Action::None => Action::None,
        }
    }

    fn update_transactions_table(
        &mut self,
        message: transactions_table::Message,
    ) -> Action {
        match self.transactions_table.update(message) {
            transactions_table::Action::None => Action::None,
        }
    }

    fn update_new_transaction_form(
        &mut self,
        message: new_transaction_form::Message,
    ) -> Action {
        match self.new_transaction_form.update(message) {
            new_transaction_form::Action::None => Action::None,
        }
    }
}

impl<'a> Viewable<'a, Message> for TransactionsView {
    fn view(&'a self) -> Element<'a, Message> {
        let navigation = self.navigation.view().map(Message::NavigationMessage);
        let table = self.transactions_table.view().map(Message::TransactionsTableMessage);
        let new_transaction_form = self.new_transaction_form.view().map(Message::NewTransactionFormMessage);

        row![
            Container::new(navigation).width(Length::FillPortion(1)),
            column![
                new_transaction_form,
                table,
            ].spacing(u32::from(SPACING_LG)).width(Length::FillPortion(3)),
        ]
        .align_y(alignment::Vertical::Center)
        .height(Length::Fill)
        .spacing(u32::from(SPACING_LG))
        .into()
    }
}