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/parsers/csv/mod.rs | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 src/parsers/csv/mod.rs

(limited to 'src/parsers/csv')

diff --git a/src/parsers/csv/mod.rs b/src/parsers/csv/mod.rs
new file mode 100644
index 0000000..c906202
--- /dev/null
+++ b/src/parsers/csv/mod.rs
@@ -0,0 +1,93 @@
+use std::fs::File;
+use std::io;
+use std::io::BufRead;
+use std::collections::HashMap;
+
+/**
+  Represents a CSV file 
+  **/
+
+pub struct CsvFile {
+	path : String,
+	delim : String,
+	pub header : Vec<String>,
+	pub content : Vec<Vec<String>>,
+	has_header : bool
+}
+
+/*
+ * Iterator for the CSV file
+ */
+pub struct CsvFileIterator<'a> {
+	file : &'a CsvFile,
+	line : usize,
+	column : usize,
+	max_column : usize
+}
+
+impl <'a> Iterator for CsvFileIterator<'a> {
+	type Item = HashMap<&'a String,&'a String>;
+
+	fn next(&mut self) -> Option<Self::Item> {
+		let k = self.file.content.get(self.line)?;
+		let it : HashMap<&'a String, &'a String> = self.file.header.iter().zip(k.iter()).collect();
+		self.line = self.line + 1;
+		Some(it)
+	}
+}
+
+impl CsvFile {
+	pub fn new(path: &str, delim: &str, header: bool) -> CsvFile {
+		CsvFile {
+			path : String::from(path),
+			delim: String::from(delim),
+			header : Vec::new(),
+			content : Vec::new(),
+			has_header : header 
+		}
+
+	}
+
+	// TODO nicht gleich viele spalten
+	fn parse_line(line : String, delim: &str) -> Vec<String> {
+		let mut columns : Vec<String> = Vec::new();
+		for column in line.split(delim).collect::<Vec<&str>>() {
+			columns.push(column.trim_matches(|c| c == '\'' || c == '\"').to_string());
+		}
+		columns
+	}
+
+
+	pub fn from_file(path: &str, delim: &str, header: bool) -> Result<CsvFile, io::Error> {
+		let fd = File::open(path)?;
+		let reader = io::BufReader::new(fd);
+		let mut column_names : Vec<String> = Vec::new();
+		let mut lines : Vec<Vec<String>> = Vec::new();
+		let mut first = true;
+		
+		for line in reader.lines() {
+			let line = line?;
+			if header && first {
+				column_names.append(&mut CsvFile::parse_line(line, delim));
+				first = false;
+			} else {
+				lines.push(CsvFile::parse_line(line, delim));
+			}
+		}
+		
+		Ok(CsvFile { path: String::from(path),
+			     delim : String::from(delim),
+			     header : column_names,
+			     content : lines,
+			     has_header: header } )
+	}
+
+	pub fn iter(&self) -> CsvFileIterator {
+		CsvFileIterator { file : self,
+			line : 0,
+			column : 0,
+			max_column : self.header.len()
+		}
+	}
+
+}
-- 
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