wallet_system 0.1.3

A wallet system simulation in Rust.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158

use rand::distributions::Alphanumeric;
use rand::Rng;
use crate::accounts::{Account, AccountResponse, AccountTransferResponse, AccountType, DisplayAccount};

/// Basic account implementation with balance, currency, and account number
#[derive(Debug)]
pub struct BasicAccount {
    balance: f64,
    currency: String,
    account_number: String,
    account_type: AccountType,
}

impl BasicAccount {
    pub fn new(currency: &str) -> Self {
        let account_number = format!(
            "{}-{}",
            AccountType::Basic,
            rand::thread_rng()
                .sample_iter(&Alphanumeric)
                .take(10)
                .map(char::from)
                .collect::<String>()
        );

        BasicAccount {
            balance: 0.0,
            currency: currency.to_string(),
            account_number,
            account_type: AccountType::Basic,
        }
    }
}

impl DisplayAccount for BasicAccount {
    fn display_details(&self) {
        println!("Account Number: {}", self.account_number);
        println!("Account Type: {:?}", self.account_type);
        println!("Currency: {}", self.currency);
        println!("Balance: {}", self.balance);
    }
}

impl Account for BasicAccount {

    fn get_balance(&self) -> f64 {
        self.balance
    }

    fn deposit(&mut self, amount: f64) -> AccountResponse {
        if amount < 0.0 {
            return AccountResponse {
                account_number: self.account_number.clone(),
                account_type: self.account_type.clone(),
                currency: self.currency.clone(),
                balance: self.balance,
                is_successful: false,
                error_message: Some("Cannot deposit a negative amount".to_string()),
            };
        }
        self.balance += amount;
        AccountResponse {
            account_number: self.account_number.clone(),
            account_type: self.account_type.clone(),
            currency: self.currency.clone(),
            balance: self.balance,
            is_successful: true,
            error_message: None,
        }
    }

    fn withdraw(&mut self, amount: f64) -> AccountResponse {
        if amount < 0.0 {
            return AccountResponse {
                account_number: self.account_number.clone(),
                account_type: self.account_type.clone(),
                currency: self.currency.clone(),
                balance: self.balance,
                is_successful: false,
                error_message: Some("Cannot withdraw a negative amount".to_string()),
            };
        }
        if self.balance >= amount {
            self.balance -= amount;
            AccountResponse {
                account_number: self.account_number.clone(),
                account_type: self.account_type.clone(),
                currency: self.currency.clone(),
                balance: self.balance,
                is_successful: true,
                error_message: None,
            }
        } else {
            AccountResponse {
                account_number: self.account_number.clone(),
                account_type: self.account_type.clone(),
                currency: self.currency.clone(),
                balance: self.balance,
                is_successful: false,
                error_message: Some("Insufficient funds".to_string()),
            }
        }
    }

    fn get_currency(&self) -> &str {
        &self.currency
    }

    fn get_account_number(&self) -> &str {
        &self.account_number
    }

    fn get_account_type(&self) -> AccountType {
        self.account_type.clone()
    }

    fn transfer(&mut self, to_account: &mut dyn Account, amount: f64) -> AccountTransferResponse {
        let recipient_account_number = to_account.get_account_number().to_string();
        let recipient_account_type = to_account.get_account_type().clone();
        let currency = self.currency.clone();

        if self.balance >= amount {
            // Withdraw from sender's account
            let withdrawal_response = self.withdraw(amount);
            if withdrawal_response.is_successful {
                // Deposit to recipient's account
                let deposit_response = to_account.deposit(amount);
                if deposit_response.is_successful {
                    return AccountTransferResponse {
                        account_number: self.account_number.clone(),
                        account_type: self.account_type.clone(),
                        currency: currency.clone(),
                        recipient_account_number,
                        recipient_account_type,
                        balance: self.balance,
                        is_successful: true,
                        error_message: None,
                    };
                }
            }
        }

        AccountTransferResponse {
            account_number: self.account_number.clone(),
            account_type: self.account_type.clone(),
            currency: currency.clone(),
            recipient_account_number,
            recipient_account_type,
            balance: self.balance,
            is_successful: false,
            error_message: Some("Insufficient funds".to_string()),
        }
    }

    fn get_overdraft_limit(&self) -> f64 {
        0.0
    }
}