61 lines
1.4 KiB
Go
61 lines
1.4 KiB
Go
// 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 report
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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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// always put all the related things together as in here
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// Result stores metrics for a domain
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// it uses the value mechanics,
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// because it doesn't have to update anything
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type Result struct {
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Domain string `json:"domain"`
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Visits int `json:"visits"`
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TimeSpent int `json:"time_spent"`
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// add more metrics if needed
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}
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// add adds the metrics of another Result to itself and returns a new Result
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func (r Result) add(other Result) Result {
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return Result{
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Domain: r.Domain,
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Visits: r.Visits + other.Visits,
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TimeSpent: r.TimeSpent + other.TimeSpent,
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}
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}
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// parse parses a single log line
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func parse(line string) (r Result, err error) {
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fields := strings.Fields(line)
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if len(fields) != 3 {
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return r, fmt.Errorf("missing fields: %v", fields)
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}
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f := new(field)
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r.Domain = fields[0]
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r.Visits = f.atoi("visits", fields[1])
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r.TimeSpent = f.atoi("time spent", fields[2])
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return r, f.err
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}
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// field helps for field parsing
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type field struct{ err error }
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func (f *field) atoi(name, val string) int {
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n, err := strconv.Atoi(val)
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if n < 0 || err != nil {
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f.err = fmt.Errorf("incorrect %s: %q", name, val)
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}
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return n
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}
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