From 2e0a6909cbfb2479edd7fba78fa4d0135a79ae3f Mon Sep 17 00:00:00 2001
From: Benedict Börger <benedict@0xb8000.de>
Date: Sat, 23 Mar 2019 15:40:35 +0100
Subject: [global] refactoring code base

---
 src/web_frontend/balance.rs | 118 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 src/web_frontend/balance.rs

(limited to 'src/web_frontend/balance.rs')

diff --git a/src/web_frontend/balance.rs b/src/web_frontend/balance.rs
new file mode 100644
index 0000000..2cbebec
--- /dev/null
+++ b/src/web_frontend/balance.rs
@@ -0,0 +1,118 @@
+use parsers::csv::CsvFile;
+use banking::Account;
+//use parsers::ini::IniFile;
+use std::collections::HashMap;
+use rocket_contrib::templates::Template;
+use rocket::response::NamedFile;
+use std::path::{PathBuf, Path};
+use rocket::request::Form;
+use rocket::http::RawStr;
+use regex::Regex;
+use chrono::{NaiveDate, Utc};
+use chrono::Datelike;
+
+#[derive(Serialize)]
+struct MonthEarnSpend {
+	name : String,
+	earned : f32,
+	spent : f32,
+}
+
+
+#[derive(Serialize)]
+struct BalanceContext {
+	account_name : String,
+	months : Vec<MonthEarnSpend>,
+	date_start : String,
+	date_end : String
+}
+
+#[derive(Debug)]
+struct DateRange {
+	start_year : i32,
+	start_month : u32,
+	end_year : i32,
+	end_month : u32,
+}
+
+impl DateRange {
+	fn new(start : chrono::NaiveDate, end : chrono::NaiveDate) -> DateRange {
+		DateRange {
+			start_year : start.year(),
+			start_month : start.month(),
+			end_year : end.year(),
+			end_month : end.month(),
+		}
+	}
+}
+
+impl Iterator for DateRange {
+	type Item = chrono::NaiveDate;
+
+	fn next(&mut self) -> Option<Self::Item> {
+		println!("next called");
+		if (self.start_year <= self.end_year) {
+			if(self.start_month <= self.end_month) {
+				let mut tmp = self.start_year.to_string();
+				if self.start_month < 10 {
+					tmp.push_str("-0");
+				} else {
+					tmp.push_str("-");
+				}
+				tmp.push_str(&self.start_month.to_string());
+				tmp.push_str("-01");
+				if self.start_month < 13 {
+					self.start_month = self.start_month + 1;
+				} else {
+					self.start_month = 1;
+					self.start_year = self.start_year + 1;
+				}
+				println!("{}", tmp);
+				return Some(chrono::NaiveDate::parse_from_str(&tmp, "%Y-%m-%d").unwrap())
+			}
+		}
+		None
+	}
+}
+
+#[get("/balance?<start>&<end>")]
+pub fn balance_handler(start : Option<&RawStr>, end : Option<&RawStr>) -> rocket_contrib::templates::Template {
+	let date_start = match start {
+		Some(s) => { let mut tmp = s.to_string();
+			tmp.push_str("-01");
+			chrono::NaiveDate::parse_from_str(&tmp, "%Y-%m-%d").unwrap() },
+		None => Utc::today().naive_utc()
+	};
+	let date_end = match end {
+		Some(s) => { let mut tmp = s.to_string();
+			tmp.push_str("-01");
+			chrono::NaiveDate::parse_from_str(&tmp, "%Y-%m-%d").unwrap() },
+		None => Utc::today().naive_utc() 
+	};
+	let date_range = DateRange::new(date_start, date_end);	
+
+    let mut earn_spend_v = Vec::new();
+	for date in date_range {
+	    let transactions = CsvFile::from_file("data/t.csv", ";", true);
+	    let t : Vec<crate::banking::Transaction> ; 
+	    match transactions {
+		    Ok(trans) => t = crate::banking::Transaction::from_sparkasse_csv_file(trans),
+		    Err(e) => panic!("could not read file {:?}", e)
+	    }
+	    let result : Vec<_> = t.iter().filter(|x| x.date.month() == date.month()).collect();
+	    let mut earn = 0.0;
+	    let mut spend = 0.0;
+	    for r in &result {
+		    if r.amount > 0.0 {
+			    earn = earn + r.amount;
+		    } else {
+			    spend = spend + r.amount.abs();
+		    }
+	    }
+	    earn_spend_v.push(MonthEarnSpend { name : date.to_string(), earned : earn, spent : spend});
+	}
+	let context = BalanceContext { account_name : String::from("Girokonto"),
+		months : earn_spend_v , date_start : date_start.to_string()[0..7].to_string(),
+		date_end : date_end.to_string()[0..7].to_string()};
+	Template::render("balance", context)
+}
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