309 lines
8.5 KiB
Go
309 lines
8.5 KiB
Go
package archive
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import (
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"bufio"
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"fmt"
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"html"
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"html/template"
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"io/ioutil"
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"math"
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"net/http"
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"os"
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"regexp"
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"strings"
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)
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const (
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pageNotSet int = -1
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)
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type ArchiveState struct {
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svr *ArchiveServer
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log *LogSource
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logBestSlug string
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query string
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queryIsRegex bool
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ym YearMonth
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page int
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highestPage int
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}
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func NewArchiveState(svr *ArchiveServer) *ArchiveState {
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return &ArchiveState{
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svr: svr,
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page: pageNotSet,
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}
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}
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func (this *ArchiveState) selectSource(log *LogSource, slug string) {
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this.log = log
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this.logBestSlug = slug
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}
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// renderView renders a single page of log entries.
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// - Mandatory: log, ym
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// - Optional: page
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func (this *ArchiveState) renderView(w http.ResponseWriter) {
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fname, err := this.svr.LogFile(this.log, this.ym)
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if err != nil {
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this.renderError(w, err.Error())
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return
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}
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fc, err := ioutil.ReadFile(fname)
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if err != nil {
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this.renderError(w, err.Error())
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return
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}
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lines := strings.Split(string(fc), "\n")
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this.highestPage = int(math.Ceil(float64(len(lines))/float64(this.svr.cfg.LinesPerPage))) - 1
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if this.page == pageNotSet || this.page > this.highestPage {
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this.page = this.highestPage
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}
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if this.page < 0 {
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this.page = 0
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}
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startLine := this.svr.cfg.LinesPerPage * this.page
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endLine := this.svr.cfg.LinesPerPage * (this.page + 1)
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if endLine > len(lines) {
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endLine = len(lines)
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}
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output := ""
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for i := startLine; i < endLine; i += 1 {
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output += template.HTMLEscapeString(lines[i]) + "<br>\n"
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}
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this.renderTemplate(w, []byte(output))
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}
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// renderSearch renders the search results.
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// - Mandatory: log, query, queryIsRegex
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func (this *ArchiveState) renderSearch(w http.ResponseWriter) {
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var matcher func(line string) bool
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if this.queryIsRegex {
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rx, err := regexp.Compile(`(?i)` + this.query)
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if err != nil {
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this.renderError(w, "Invalid regular expression "+this.query+" ("+err.Error()+")")
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return
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}
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matcher = rx.MatchString
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} else {
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queryLower := strings.ToLower(this.query)
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matcher = func(line string) bool {
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return strings.Contains(strings.ToLower(line), queryLower)
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}
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}
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this.renderTemplateHead(w)
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totalResults := 0
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w.Write([]byte(`<ul>`))
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limit := this.log.LatestDate().Next() // one off the end
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for ympair := this.log.EarliestDate(); !ympair.Equals(limit); ympair = ympair.Next() {
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fname, err := this.svr.LogFile(this.log, ympair)
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if err != nil {
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continue // no log exists for this ym
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}
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fh, err := os.Open(fname)
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if err != nil {
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continue // can't open this log file
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}
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func() {
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defer fh.Close()
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scanner := bufio.NewScanner(fh)
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for i := 0; scanner.Scan(); i += 1 {
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if !matcher(scanner.Text()) {
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continue
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}
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totalResults += 1
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page := i / this.svr.cfg.LinesPerPage
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lineNo := i % this.svr.cfg.LinesPerPage
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url := fmt.Sprintf(`/%s/%d/%d/page-%d#line-%d`, this.logBestSlug, ympair.Year, ympair.Month, page, lineNo)
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w.Write([]byte(`<li><a href="` + template.HTMLEscapeString(url) + `">»</a> ` + template.HTMLEscapeString(scanner.Text()) + `</li>`))
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}
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}()
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}
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w.Write([]byte(`</ul>`))
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if totalResults == 0 {
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w.Write([]byte(`No search results for "<em>` + template.HTMLEscapeString(this.query) + `</em>"`))
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} else {
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w.Write([]byte(`<br><em>Found ` + fmt.Sprintf("%d", totalResults) + ` total result(s).</em><br><br>`))
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}
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this.renderTemplateFoot(w)
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}
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// renderError renders a plain text string, escaping it for HTML use.
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func (this *ArchiveState) renderError(w http.ResponseWriter, msg string) {
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this.renderTemplate(w, []byte(template.HTMLEscapeString(msg)))
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}
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func (this *ArchiveState) renderTemplate(w http.ResponseWriter, body []byte) {
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this.renderTemplateHead(w)
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w.Write(body)
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this.renderTemplateFoot(w)
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}
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func (this *ArchiveState) renderTemplateHead(w http.ResponseWriter) {
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w.Header().Set(`Content-Type`, `text/html; charset=UTF-8`)
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w.Header().Set(`X-UA-Compatible`, `IE=Edge`)
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w.WriteHeader(200)
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title := `Archives`
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if this.log != nil {
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title = this.log.Description + ` Archives`
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}
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showPageURLs := (this.log != nil && len(this.query) == 0)
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w.Write([]byte(`<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
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<title>` + template.HTMLEscapeString(title) + `</title>
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<link rel="stylesheet" type="text/css" href="/style.css">
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</head>
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<body>
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<div class="layout-top nav">
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<div id="tr1" style="display:none;"></div>
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<div id="tr2" style="display:none;"></div>
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<div class="ddmenu" id="spm" style="display:none;">
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<a href="/">Latest</a>
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<a onclick="fontSize(1);">Font increase</a>
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<a onclick="fontSize(-1);">Font decrease</a>
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<a href="/download" onclick="return confirm('Are you sure you want to download a backup?');">Download backup</a>
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</div>
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<a onclick="toggleMenu();"><div id="logo" class="layout-pushdown"></div></a>
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<span class="area-nav">
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<form method="GET" id="frmHub">
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<select name="h" id="selHub">
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`))
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for i, h := range this.svr.cfg.Logs {
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slug, _ := this.svr.bestSlugFor(&this.svr.cfg.Logs[i])
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current := (this.log == &this.svr.cfg.Logs[i])
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w.Write([]byte(`<option value="` + template.HTMLEscapeString(slug) + `" ` + attr(current, "selected") + `>` + template.HTMLEscapeString(h.Description) + `</option>`))
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}
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w.Write([]byte(`
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</select>
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</form>
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`))
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if showPageURLs {
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w.Write([]byte(`
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<form method="GET">
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<input type="hidden" name="h" value="` + template.HTMLEscapeString(this.logBestSlug) + `">
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<select id="seldate" onchange="setYM(this);">
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`))
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// Generate month dropdown options
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lastY := -1
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limit := this.log.LatestDate().Next() // one off the end
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for ympair := this.log.EarliestDate(); !ympair.Equals(limit); ympair = ympair.Next() {
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if ympair.Year != lastY {
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if lastY != -1 {
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w.Write([]byte(`</optgroup>`))
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}
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w.Write([]byte(`<optgroup label="` + fmt.Sprintf("%d", ympair.Year) + `">`))
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lastY = ympair.Year
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}
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w.Write([]byte(fmt.Sprintf(`<option value="%d-%d" %s>%s</option>`, ympair.Year, ympair.Month, attr(ympair.Equals(this.ym), "selected"), template.HTMLEscapeString(ympair.Month.String()))))
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}
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//
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pageBase := fmt.Sprintf(`/%s/%d/%d`, this.logBestSlug, this.ym.Year, this.ym.Month)
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previousPage := this.page - 1
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if previousPage < 0 {
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previousPage = 0
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}
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nextPage := this.page + 1
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if nextPage > this.highestPage {
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nextPage = this.highestPage
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}
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prevMonth := this.ym.Prev() // FIXME check bounds
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prevMonthLink := fmt.Sprintf(`/%s/%d/%d`, this.logBestSlug, prevMonth.Year, prevMonth.Month)
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nextMonth := this.ym.Next() // FIXME check bounds
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nextMonthLink := fmt.Sprintf(`/%s/%d/%d`, this.logBestSlug, nextMonth.Year, nextMonth.Month)
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w.Write([]byte(`
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</optgroup>
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</select>
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<input type="hidden" name="y" id="f_y" value="">
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<input type="hidden" name="m" id="f_m" value="">
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<input type="hidden" name="p" value="0" >
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</form>
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<div class="mini-separator layout-pushdown"></div>
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<a style="display:none;" id="monthprev" accesskey="j" href="` + html.EscapeString(prevMonthLink) + `">
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<a style="display:none;" id="monthnext" accesskey="k" href="` + html.EscapeString(nextMonthLink) + `">
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<a class="btn" href="` + pageBase + `/page-0">«</a>
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<a class="btn" id="pgprev" accesskey="h" title="Previous page (Alt+H)" href="` + pageBase + `/page-` + fmt.Sprintf("%d", previousPage) + `">‹</a>
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` + fmt.Sprintf("%d", this.page) + `
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<a class="btn" id="pgnext" accesskey="l" title="Next page (Alt+L)" href="` + pageBase + `/page-` + fmt.Sprintf("%d", nextPage) + `">›</a>
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<a class="btn" href="` + pageBase + `">»</a>
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`))
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}
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w.Write([]byte(`
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<div class="pad"></div>
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</span>
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<span class="area-search">
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<form method="GET">
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<input type="hidden" name="h" value="` + template.HTMLEscapeString(this.logBestSlug) + `">
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<input type="text" id="searchbox" name="q" value="` + template.HTMLEscapeString(this.query) + `" placeholder="Search..." accesskey="m" title="Search (Alt+M)">
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<input type="submit" value="»">
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<input type="checkbox" class="layout-pushdown" name="rx" value="1" title="PCRE Regular Expression" ` + attr(this.queryIsRegex, "checked") + `>
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</form>
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</span>
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</div>
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<div class="layout-body" id="chatarea">
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`))
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// Header ends
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}
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func (this *ArchiveState) renderTemplateFoot(w http.ResponseWriter) {
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w.Write([]byte(`
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</div>
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<script type="text/javascript" src="/archive.js?nonce=` + fmt.Sprintf("%d", this.svr.startup.Unix()) + `"></script>
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</body>
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</html>
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`))
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}
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