mirror of https://github.com/miniflux/v2.git
128 lines
3.6 KiB
Go
128 lines
3.6 KiB
Go
// Copyright 2017 Frédéric Guillot. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package rewrite // import "miniflux.app/reader/rewrite"
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import (
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"strconv"
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"strings"
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"text/scanner"
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"miniflux.app/logger"
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"miniflux.app/url"
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)
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type rule struct {
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name string
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args []string
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}
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// Rewriter modify item contents with a set of rewriting rules.
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func Rewriter(entryURL, entryContent, customRewriteRules string) string {
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rulesList := getPredefinedRewriteRules(entryURL)
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if customRewriteRules != "" {
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rulesList = customRewriteRules
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}
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rules := parseRules(rulesList)
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rules = append(rules, rule{name: "add_pdf_download_link"})
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logger.Debug(`[Rewrite] Applying rules %v for %q`, rules, entryURL)
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for _, rule := range rules {
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entryContent = applyRule(entryURL, entryContent, rule)
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}
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return entryContent
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}
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func parseRules(rulesText string) (rules []rule) {
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scan := scanner.Scanner{Mode: scanner.ScanIdents | scanner.ScanStrings}
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scan.Init(strings.NewReader(rulesText))
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for {
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switch scan.Scan() {
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case scanner.Ident:
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rules = append(rules, rule{name: scan.TokenText()})
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case scanner.String:
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if l := len(rules) - 1; l >= 0 {
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text := scan.TokenText()
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text, _ = strconv.Unquote(text)
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rules[l].args = append(rules[l].args, text)
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}
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case scanner.EOF:
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return
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}
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}
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}
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func applyRule(entryURL, entryContent string, rule rule) string {
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switch rule.name {
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case "add_image_title":
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entryContent = addImageTitle(entryURL, entryContent)
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case "add_mailto_subject":
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entryContent = addMailtoSubject(entryURL, entryContent)
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case "add_dynamic_image":
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entryContent = addDynamicImage(entryURL, entryContent)
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case "add_youtube_video":
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entryContent = addYoutubeVideo(entryURL, entryContent)
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case "add_invidious_video":
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entryContent = addInvidiousVideo(entryURL, entryContent)
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case "add_youtube_video_using_invidious_player":
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entryContent = addYoutubeVideoUsingInvidiousPlayer(entryURL, entryContent)
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case "add_youtube_video_from_id":
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entryContent = addYoutubeVideoFromId(entryContent)
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case "add_pdf_download_link":
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entryContent = addPDFLink(entryURL, entryContent)
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case "nl2br":
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entryContent = replaceLineFeeds(entryContent)
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case "convert_text_link", "convert_text_links":
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entryContent = replaceTextLinks(entryContent)
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case "fix_medium_images":
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entryContent = fixMediumImages(entryURL, entryContent)
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case "use_noscript_figure_images":
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entryContent = useNoScriptImages(entryURL, entryContent)
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case "replace":
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// Format: replace("search-term"|"replace-term")
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if len(rule.args) >= 2 {
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entryContent = replaceCustom(entryContent, rule.args[0], rule.args[1])
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} else {
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logger.Debug("[Rewrite] Cannot find search and replace terms for replace rule %s", rule)
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}
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case "remove":
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// Format: remove("#selector > .element, .another")
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if len(rule.args) >= 1 {
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entryContent = removeCustom(entryContent, rule.args[0])
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} else {
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logger.Debug("[Rewrite] Cannot find selector for remove rule %s", rule)
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}
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case "add_castopod_episode":
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entryContent = addCastopodEpisode(entryURL, entryContent)
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case "base64_decode":
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if len(rule.args) >= 1 {
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entryContent = applyFuncOnTextContent(entryContent, rule.args[0], decodeBase64Content)
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} else {
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entryContent = applyFuncOnTextContent(entryContent, "body", decodeBase64Content)
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}
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case "parse_markdown":
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entryContent = parseMarkdown(entryContent)
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}
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return entryContent
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}
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func getPredefinedRewriteRules(entryURL string) string {
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urlDomain := url.Domain(entryURL)
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for domain, rules := range predefinedRules {
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if strings.Contains(urlDomain, domain) {
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return rules
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}
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}
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return ""
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}
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