move: log parsers

logparser/testing/report/parser.go

@@ -0,0 +1,52 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package report
+
+import (
+	"fmt"
+)
+
+// Parser parses the log file and generates a summary report.
+type Parser struct {
+	summary *Summary // summarizes the parsing results
+	lines   int      // number of parsed lines (for the error messages)
+	lerr    error    // the last error occurred
+}
+
+// New returns a new parsing state.
+func New() *Parser {
+	return &Parser{summary: newSummary()}
+}
+
+// Parse parses a log line and adds it to the summary.
+func (p *Parser) Parse(line string) {
+	// if there was an error do not continue
+	if p.lerr != nil {
+		return
+	}
+
+	// chain the parser's error to the result's
+	res, err := parse(line)
+	if p.lines++; err != nil {
+		p.lerr = fmt.Errorf("line #%d: %s", p.lines, err)
+		return
+	}
+
+	p.summary.update(res)
+}
+
+// Summarize summarizes the parsing results.
+// Only use it after the parsing is done.
+func (p *Parser) Summarize() *Summary {
+	return p.summary
+}
+
+// Err returns the last error encountered
+func (p *Parser) Err() error {
+	return p.lerr
+}