Initial commit

data.csv

+"name","email","company"
+"Andrey","andrey@cc.de",""
+"Sems","sems@cc.de","cc"

reader.groovy

+#!/usr/bin/env groovy
+
+String unescape(String escaped) {
+    return escaped
+}
+
+// TODO implement this
+//assert 'asdf' == unescape('"asdf"')
+//assert 'as"df' == unescape('"as""df"')
+//assert "" == '""'
+
+assert unescape('asdf') == 'asdf'
+
+List<String> splitLine(String line) {
+    return line.split(/,/)
+}
+
+assert splitLine('a,b,c') == ['a', 'b', 'c']
+
+List<String> lines = new File('data.csv').readLines()
+
+Set<String> headers = []
+
+// get headers
+splitLine(lines.remove(0)).each {
+    headers.add(it)
+}
+println headers
+
+// TODO get lines
+// TODO split lines into values
+
+List<Map<String, String>> parsedLines = []
+
+lines.each { line ->
+    Map<String, String> lineMap = [:]
+    def values = splitLine(line)
+    headers.eachWithIndex { header, index ->
+        lineMap[header] = values[index]
+    }
+    parsedLines << lineMap
+}
+println parsedLines.dump()
+println parsedLines

writer.groovy

+#!/usr/bin/env groovy
+
+String escape(String unescaped) {
+    if (!unescaped) {
+        return '""'
+    }
+    return '"' + unescaped.replaceAll(~/"/, '""') + '"'
+}
+
+assert escape('asdf') == '"asdf"'
+assert escape('as"df') == '"as""df"'
+assert escape(null) == '""'
+
+def writeToCsv(List<Map<String, String>> inputMap) {
+    // print headers
+    Set<String> headers = []
+    inputMap.each {
+        it.each { k, v ->
+            headers.add(k)
+        }
+    }
+    println headers.collect {
+        escape(it)
+    }.join(",")
+
+    // print values as CSV
+    inputMap.each { Map<String, String> lineMap ->
+        println headers.collect { String key ->
+            escape(lineMap[key])
+        }.join(',')
+    }
+}
+
+List<Map<String, String>> inputMap = [
+        [name: 'Andrey', email: 'andrey@cc.de'],
+        [name: 'Sems', email: 'sems@cc.de', company: 'cc']
+]
+writeToCsv(inputMap)