75 lines
1.6 KiB
Go
75 lines
1.6 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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)
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// parser keeps track of the parsing
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type parser struct {
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sum map[string]result // metrics per domain
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domains []string // unique domain names
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lines int // number of parsed lines (for the error messages)
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lerr error // the last error occurred
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// totalVisits int // total visits for all domains
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// totalUniques int // total uniques for all domains
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}
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// newParser constructs, initializes and returns a new parser
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func newParser() *parser {
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return &parser{sum: make(map[string]result)}
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}
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// parse a log line and return the result
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func parse(p *parser, line string) (r result) {
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if p.lerr != nil {
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return
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}
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p.lines++
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r, err := parseResult(line)
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if err != nil {
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p.lerr = fmt.Errorf("line %d: %v", p.lines, err)
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}
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return r
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}
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// update the parsing results
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func update(p *parser, r result) {
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if p.lerr != nil {
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return
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}
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// Collect the unique domains
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cur, ok := p.sum[r.domain]
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if !ok {
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p.domains = append(p.domains, r.domain)
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}
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// Keep track of total and per domain visits
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// p.totalVisits += r.visits
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// p.totalUniques += r.uniques
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// create and assign a new copy of `visit`
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// p.sum[r.domain] = result{
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// domain: r.domain,
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// visits: r.visits + cur.visits,
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// uniques: r.uniques + cur.uniques,
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// }
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p.sum[r.domain] = addResult(r, cur)
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}
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// err returns the last error encountered
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func err(p *parser) error {
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return p.lerr
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}
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