nytpu
118 lines
3.0 KiB
Go
118 lines
3.0 KiB
Go
// Copyright (C) 2021 nytpu
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// SPDX-License-Identifier: AGPL-3.0-or-later
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// For more license details, see LICENSE or <https://www.gnu.org/licenses/agpl-3.0.html>.
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// This file incorporates code from makeworld's amfora:
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// https://github.com/makeworld-the-better-one/amfora/blob/master/subscriptions/structs.go
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// Original source is Copyright 2020 makeworld and is licensed under the
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// terms of the GNU General Public License Version 3.0.
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// https://www.gnu.org/licenses/gpl-3.0-standalone.html
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// package core implements the structs and other necessary resources for storing
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// and managing feeds and pages
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package core
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"sync"
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)
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// Global instance of FullData
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var Data = FullData{
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FeedsMu: &sync.RWMutex{},
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PagesMu: &sync.RWMutex{},
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// Maps are created in init()
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}
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// the Header of feeds.gmi.
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// set in Init, either to the contents of header.gmi or to the default string
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var Header string
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// Timeout for requests
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var Timeout int
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// have to do this instead of the automatically called init() because
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// initialization stuff requires parsing of command line args first
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func Init(dataPath string) error {
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// initialize comitium.json & data maps
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f, err := os.Open(filepath.Join(dataPath, "comitium.json"))
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if err == nil {
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// File exists and could be opened
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fi, err := f.Stat()
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if err == nil && fi.Size() > 0 {
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// File is not empty
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jsonBytes, err := ioutil.ReadAll(f)
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f.Close()
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if err != nil {
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return fmt.Errorf("read comitium.json error: %w", err)
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}
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err = json.Unmarshal(jsonBytes, &Data)
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if err != nil {
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return fmt.Errorf("comitium.json is corrupted: %w", err)
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}
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}
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f.Close()
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} else if !os.IsNotExist(err) {
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// There's an error opening the file, but it's not bc is doesn't exist
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return fmt.Errorf("open comitium.json error: %w", err)
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}
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if Data.Feeds == nil {
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Data.Feeds = make(map[string]*Feed)
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}
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if Data.Pages == nil {
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Data.Pages = make(map[string]*Page)
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}
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// initialize header.gmi
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f, err = os.Open(filepath.Join(dataPath, "header.gmi"))
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if err == nil {
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fi, err := f.Stat()
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if err == nil && fi.Size() > 0 {
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headerBytes, err := ioutil.ReadAll(f)
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f.Close()
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if err != nil {
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return fmt.Errorf("read header.gmi error: %w", err)
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}
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Header = string(headerBytes)
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}
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f.Close()
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} else if !os.IsNotExist(err) {
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return fmt.Errorf("open header.gmi error: %w", err)
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}
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if Header == "" {
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Header = `# comitium subscriptions
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`
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}
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Timeout = 10
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return nil
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}
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func (d *FullData) WriteJSON(dataPath string) error {
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// use .new so if there's a corruption when writing the old file is intact
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path := filepath.Join(dataPath, "comitium.json.new")
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d.RLock()
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jsonBytes, err := json.MarshalIndent(&d, "", "\t")
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d.RUnlock()
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if err != nil {
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return err
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}
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err = ioutil.WriteFile(path, jsonBytes, 0666)
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if err != nil {
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return err
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}
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// if full write was successful then overwrite original
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err = os.Rename(path, filepath.Join(dataPath, "comitium.json"))
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return err
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}
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