From 817d06fc2ef4f8e258d906fad96c26f72b32c702 Mon Sep 17 00:00:00 2001
From: Justin Worthe <justin@worthe-it.co.za>
Date: Thu, 23 Nov 2017 22:03:02 +0200
Subject: Basic functionality: parses qif files and strips T=0 entries

---
 .gitignore  |  2 ++
 Cargo.lock  |  4 ++++
 Cargo.toml  |  6 +++++
 src/lib.rs  |  1 +
 src/main.rs | 25 ++++++++++++++++++++
 src/qif.rs  | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 114 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/lib.rs
 create mode 100644 src/main.rs
 create mode 100644 src/qif.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..eccd7b4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target/
+**/*.rs.bk
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..ad707a0
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,4 @@
+[root]
+name = "qif_parser"
+version = "0.1.0"
+
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..7c48e58
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "qif_parser"
+version = "0.1.0"
+authors = ["Justin Worthe <justin@worthe-it.co.za>"]
+
+[dependencies]
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..51368c5
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1 @@
+pub mod qif;
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..291c548
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,25 @@
+extern crate qif_parser;
+use qif_parser::qif::*;
+use std::io::*;
+
+
+fn main() {
+    let stdin = stdin();
+    let stdin_lock = stdin.lock();
+    let mut lines = stdin_lock.lines();
+    
+    let mut file = QifFile::new(lines.next().unwrap().unwrap());
+    let mut next_entry = Vec::new();
+
+    for line_result in lines {
+        let line = line_result.unwrap();
+        if line == String::from("^") {
+            file.append_non_empty(QifEntry::new(&next_entry));
+            next_entry.clear();
+        } else {
+            next_entry.push(line);
+        }
+    }
+
+    println!("{}", file);
+}
diff --git a/src/qif.rs b/src/qif.rs
new file mode 100644
index 0000000..46b2bc3
--- /dev/null
+++ b/src/qif.rs
@@ -0,0 +1,76 @@
+use std::fmt;
+
+pub struct QifFile {
+    header: String,
+    entries: Vec<QifEntry>
+}
+
+impl QifFile {
+    pub fn new(header: String) -> QifFile {
+        QifFile {
+            header: header,
+            entries: Vec::new()
+        }
+    }
+
+    pub fn append_non_empty(&mut self, entry: QifEntry) {
+        if !entry.is_empty() {
+            self.entries.push(entry);
+        }
+    }
+    
+    pub fn append(&mut self, entry: QifEntry) {
+        self.entries.push(entry);
+    }
+}
+
+impl fmt::Display for QifFile {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let mut hat_separated = String::new();
+
+        for entry in &self.entries {
+            hat_separated.push_str("\n");
+            hat_separated.push_str(&entry.to_string());
+            hat_separated.push_str("\n^");
+        }
+
+        write!(f, "{}{}", self.header, hat_separated)
+    }
+}
+
+pub struct QifEntry {
+    date: String,
+    amount: String,
+    description: String
+}
+
+const DATE_PREFIX: &str = "D";
+const AMOUNT_PREFIX: &str = "T";
+const DESCRIPTION_PREFIX: &str = "M";
+
+impl QifEntry {
+    pub fn new(lines: &Vec<String>) -> QifEntry {
+        let date = lines.iter().find(|l| l.starts_with(DATE_PREFIX)).expect("No date");
+        let amount = lines.iter().find(|l| l.starts_with(AMOUNT_PREFIX)).expect("No amount");
+        let description = lines.iter().find(|l| l.starts_with(DESCRIPTION_PREFIX)).expect("No description");
+        QifEntry {
+            date: date.clone(),
+            amount: amount.clone(),
+            description: description.clone()
+        }
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.amount == String::from("T0")
+    }
+
+    pub fn clean_description(&self) -> String {
+        self.description.clone()
+    }
+}
+
+impl fmt::Display for QifEntry {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}\n{}\n{}", self.date, self.amount, self.clean_description())
+    }
+}
-- 
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