65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
package yatwiki
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import (
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"bytes"
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"database/sql"
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"errors"
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"fmt"
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"html/template"
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"net/http"
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"code.ivysaur.me/yatwiki/diff"
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)
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func (this *WikiServer) routeDiff(w http.ResponseWriter, r *http.Request, oldRev, newRev int) {
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if oldRev > newRev {
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oldRev, newRev = newRev, oldRev
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}
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oa, err := this.db.GetRevision(oldRev)
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if err != nil {
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if err == sql.ErrNoRows {
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this.serveErrorMessage(w, errors.New("Invalid revision selected"))
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return
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}
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this.serveErrorMessage(w, err)
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return
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}
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na, err := this.db.GetRevision(newRev)
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if err != nil {
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if err == sql.ErrNoRows {
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this.serveErrorMessage(w, errors.New("Invalid revision selected"))
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return
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}
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this.serveErrorMessage(w, err)
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return
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}
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if oa.TitleID != na.TitleID {
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this.serveErrorMessage(w, fmt.Errorf("Preventing attempt to compare mismatched articles (%s ≠ %s)", oa.Title, na.Title))
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return
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}
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b := bytes.Buffer{}
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diff.HtmlDiff(string(oa.Body), string(na.Body), &b)
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pto := DefaultPageTemplateOptions(this.opts)
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pto.CurrentPageName = oa.Title
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pto.CurrentPageIsArticle = true
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pto.Content = template.HTML(
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`<h2>` +
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`Comparing ` + string(this.viewLink(oa.Title)) + ` versions ` +
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`<a href="` + template.HTMLEscapeString(this.opts.ExpectBaseURL+`archive/`+fmt.Sprintf("%d", oa.ArticleID)) + `">r` + fmt.Sprintf("%d", oa.ArticleID) + `</a>` +
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` - ` +
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`<a href="` + template.HTMLEscapeString(this.opts.ExpectBaseURL+`archive/`+fmt.Sprintf("%d", na.ArticleID)) + `">r` + fmt.Sprintf("%d", na.ArticleID) + `</a>` +
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`</h2>` +
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`<pre>` + string(b.Bytes()) + `</pre>`,
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)
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this.servePageResponse(w, r, pto)
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return
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}
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