118 lines
3.1 KiB
Go
118 lines
3.1 KiB
Go
/*
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Copyright © 2024 filifa
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package cmd
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import (
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"fmt"
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"html"
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"log"
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"os"
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"strings"
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"text/template"
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"github.com/mmcdole/gofeed"
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"github.com/spf13/cobra"
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)
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var output string
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// formatItem returns an individual item formatted as a string for printing.
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func formatItem(item *gofeed.Item, tmpl *template.Template) (string, error) {
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b := new(strings.Builder)
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err := tmpl.Execute(b, item)
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return html.UnescapeString(b.String()), err
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}
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// parseFeeds parses the feeds at the given urls in parallel and returns them,
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// along with any parsing errors.
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func parseFeeds(urls []string) ([]*gofeed.Feed, []error) {
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fp := gofeed.NewParser()
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feeds := make([]*gofeed.Feed, len(urls))
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errs := make([]error, len(urls))
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done := make(chan int)
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for i, url := range urls {
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go func(i int, url string) {
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feed, err := fp.ParseURL(url)
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feeds[i] = feed
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errs[i] = err
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done <- i
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}(i, url)
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}
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for i := 0; i < len(urls); i++ {
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<-done
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}
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return feeds, errs
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}
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func rssfetch(cmd *cobra.Command, urls []string) {
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tmpl, err := template.New("out").Parse(output)
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if err != nil {
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log.Fatal(err)
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}
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feeds, errs := parseFeeds(urls)
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for _, err := range errs {
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if err != nil {
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log.Fatal(err)
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}
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}
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for _, feed := range feeds {
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for _, item := range feed.Items {
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out, err := formatItem(item, tmpl)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("%s", out)
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}
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}
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}
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// rootCmd represents the base command when called without any subcommands
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var rootCmd = &cobra.Command{
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Use: "rssfetch <url> [url ...]",
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Short: "rssfetch outputs items contained in rss feeds",
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Long: `rssfetch outputs items contained in rss feeds.
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You can specify the output format with the -o flag. For instance, -o "{{.Title}}" will only output the title of each item.`,
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Run: rssfetch,
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Args: cobra.MinimumNArgs(1),
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}
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// Execute adds all child commands to the root command and sets flags appropriately.
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// This is called by main.main(). It only needs to happen once to the rootCmd.
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func Execute() {
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err := rootCmd.Execute()
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if err != nil {
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os.Exit(1)
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}
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}
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func init() {
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// Here you will define your flags and configuration settings.
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// Cobra supports persistent flags, which, if defined here,
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// will be global for your application.
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// rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.rssfetch.yaml)")
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// Cobra also supports local flags, which will only run
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// when this action is called directly.
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rootCmd.Flags().StringVarP(&output, "output", "o", "{{.Title}}\n\n{{.Description}}\n\n{{.Link}}\n", "output format")
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}
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