54 lines
1.1 KiB
Go
54 lines
1.1 KiB
Go
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// For more tutorials: https://blog.learngoprogramming.com
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//
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// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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package main
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import (
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"fmt"
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"strconv"
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"strings"
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)
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const fieldsLength = 4
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// result stores the parsed result for a domain
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type result struct {
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domain, page string
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visits, uniques int
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// add more metrics if needed
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}
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// parseResult from a log line
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func parseResult(line string) (r result, err error) {
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fields := strings.Fields(line)
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if len(fields) != fieldsLength {
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return r, fmt.Errorf("wrong input: %v", fields)
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}
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r.domain = fields[0]
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r.page = fields[1]
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r.visits, err = strconv.Atoi(fields[2])
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if err != nil || r.visits < 0 {
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return r, fmt.Errorf("wrong input: %q", fields[2])
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}
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r.uniques, err = strconv.Atoi(fields[3])
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if err != nil || r.uniques < 0 {
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return r, fmt.Errorf("wrong input: %q", fields[3])
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}
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return r, nil
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}
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// addResult to another one
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func addResult(r, other result) result {
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r.visits += other.visits
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r.uniques += other.uniques
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return r
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}
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