175 lines
5.4 KiB
Go
175 lines
5.4 KiB
Go
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package main
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import (
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"bufio"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"io/fs"
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"net/http"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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)
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var (
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configDir string
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config *Config
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data *Data
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)
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func LoadConfigAndData() error {
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iHateBugs, err := os.UserConfigDir()
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if err != nil {
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return fmt.Errorf("Cannot determine config directory: %s", err)
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}
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configDir = filepath.Join(iHateBugs, "omordl")
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err = os.MkdirAll(configDir, 0o700)
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if err != nil {
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return fmt.Errorf("Cannot create config directory: %s", err)
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}
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configFile, err := os.OpenFile(filepath.Join(configDir, "config.json"), os.O_RDONLY, 0o600)
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if err == nil {
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contents, err := io.ReadAll(configFile)
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if err != nil {
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return fmt.Errorf("Failed to read config file: %s", err)
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}
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err = json.Unmarshal(contents, &config)
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if err != nil {
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return fmt.Errorf("Failed to parse config file: %s", err)
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}
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} else if errors.Is(err, fs.ErrNotExist) {
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configFile, err = os.OpenFile(filepath.Join(configDir, "config.json"), os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0o600)
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if err != nil {
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return fmt.Errorf("Failed to open config file for writing default template: %s", err)
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}
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_, err = configFile.WriteString(EXAMPLE_CONFIG)
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if err != nil {
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return fmt.Errorf("Failed to write to config file: %s", err)
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}
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return fmt.Errorf("Please fill out the default template at %s", filepath.Join(configDir, "config.json"))
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} else {
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return fmt.Errorf("Failed to open config file: %s", err)
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}
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if config.ClientId == CONFIG_PLACEHOLDER || config.ClientSecret == CONFIG_PLACEHOLDER {
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return fmt.Errorf("Please fill out the default template at %s", filepath.Join(configDir, "config.json"))
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}
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dataFile, err := os.OpenFile(filepath.Join(configDir, "data.json"), os.O_RDONLY, 0o600)
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if err == nil {
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contents, err := io.ReadAll(dataFile)
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if err != nil {
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return fmt.Errorf("Failed to read data file: %s", err)
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}
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err = json.Unmarshal(contents, &data)
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if err != nil {
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return fmt.Errorf("Failed to parse data file: %s", err)
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}
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} else if !errors.Is(err, fs.ErrNotExist) {
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return fmt.Errorf("Failed to open data file: %s", err)
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}
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return nil
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}
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func WriteData() error {
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contents, err := json.Marshal(data)
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if err != nil {
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return err
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}
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file, err := os.OpenFile(filepath.Join(configDir, "data.json"), os.O_WRONLY|os.O_CREATE, 0o600)
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if err != nil {
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return err
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}
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_, err = file.Write(contents)
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return err
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}
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func GetToken(client *http.Client) (string, error) {
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if data.AuthorizationHeader != "" && data.AuthorizationExpiry != 0 && data.AuthorizationExpiry > time.Now().Unix() {
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return data.AuthorizationHeader, nil
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}
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request, err := http.NewRequest("POST", "https://www.reddit.com/api/v1/access_token?grant_type=client_credentials", nil)
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if err != nil {
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return "", fmt.Errorf("Failed to create request: %s", err)
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}
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request.Header.Add("User-Agent", USER_AGENT)
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request.SetBasicAuth(config.ClientId, config.ClientSecret)
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response, err := client.Do(request)
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if err != nil {
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return "", fmt.Errorf("Failed to get response: %s", err)
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}
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contents, err := io.ReadAll(response.Body)
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response.Body.Close()
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if err != nil {
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return "", fmt.Errorf("Failed to read response body: %s", err)
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}
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if response.StatusCode != 200 {
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return "", fmt.Errorf("Response returned status code %d, body: %s", response.StatusCode, contents)
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}
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var tokenResponse TokenResponse
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err = json.Unmarshal(contents, &tokenResponse)
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if err != nil {
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return "", fmt.Errorf("Failed to parse response: %s", err)
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}
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s := []string{tokenResponse.TokenType, tokenResponse.AccessToken}
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data.AuthorizationHeader = strings.Join(s, " ")
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data.AuthorizationExpiry = time.Now().Unix() + tokenResponse.ExpiresIn - 5
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err = WriteData()
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if err != nil {
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fmt.Fprintf(os.Stderr, "Warning: Failed to save token to disk: %s\n", err)
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}
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return data.AuthorizationHeader, nil
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}
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func GetSubmission(client *http.Client, token, submissionId string) (*Submission, error) {
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request, err := http.NewRequest("GET", "https://oauth.reddit.com/comments/"+submissionId+"/?raw_json=1&limit=1", nil)
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if err != nil {
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return nil, fmt.Errorf("Failed to create request: %s", err)
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}
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request.Header.Add("User-Agent", USER_AGENT)
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request.Header.Add("Authorization", data.AuthorizationHeader)
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response, err := client.Do(request)
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if err != nil {
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return nil, fmt.Errorf("Failed to get response: %s", err)
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}
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contents, err := io.ReadAll(response.Body)
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response.Body.Close()
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if err != nil {
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return nil, fmt.Errorf("Failed to read response body: %s", err)
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}
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if response.StatusCode != 200 {
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return nil, fmt.Errorf("Response returned status code %d, body: %s", response.StatusCode, contents)
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}
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var submission []SubmissionResponseItem
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err = json.Unmarshal(contents, &submission)
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if err != nil {
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return nil, fmt.Errorf("Failed to parse response: %s", err)
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}
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return submission[0].Data.Children[0].Data, nil
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}
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func InteractivelyAskIndex(stdin *bufio.Reader, items []string) (int, error) {
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if len(items) == 1 {
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return 0, nil
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}
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fmt.Printf("Select an item (from 1 to %d): ", len(items))
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str, err := stdin.ReadString('\n')
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if err != nil {
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return 0, fmt.Errorf("Failed to read stdin: %s", err)
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}
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i, err := strconv.Atoi(strings.TrimSpace(str))
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if err != nil {
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return 0, fmt.Errorf("Failed to parse stdin: %s", err)
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}
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i--
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if i < 0 {
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return i, errors.New("Index is under or equal to 0")
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}
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if i >= len(items) {
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return i, errors.New("Index is bigger than items available")
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}
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return i, nil
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}
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