98 lines
2.4 KiB
Go
98 lines
2.4 KiB
Go
package reddit
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import (
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"context"
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"encoding/json"
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"fmt"
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"io"
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"log/slog"
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"net/http"
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"strings"
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"github.com/tigorlazuardi/redmage/pkg/errs"
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)
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type SubredditType int
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func (su *SubredditType) UnmarshalJSON(b []byte) error {
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switch string(b) {
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case "null":
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return nil
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case `"user"`, `"u"`, "1":
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*su = SubredditTypeUser
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return nil
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case `"r"`, `"subreddit"`, "0":
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*su = SubredditTypeSub
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return nil
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}
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return errs.
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Fail("subreddit type not recognized. Valid values are 'user', 'u', 'r', 'subreddit', 0, 1, and null",
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"got", string(b),
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).
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Code(http.StatusBadRequest)
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}
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const (
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SubredditTypeSub SubredditType = iota
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SubredditTypeUser
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)
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func (s SubredditType) Code() string {
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switch s {
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case SubredditTypeUser:
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return "user"
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default:
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return "r"
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}
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}
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func (s SubredditType) String() string {
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return s.Code()
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}
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type GetPostsParam struct {
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Subreddit string
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Limit int
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After string
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SubredditType SubredditType
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}
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func (reddit *Reddit) GetPosts(ctx context.Context, params GetPostsParam) (posts Listing, err error) {
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ctx, span := tracer.Start(ctx, "*Reddit.GetPosts")
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defer span.End()
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url := fmt.Sprintf("https://reddit.com/%s/%s.json?limit=%d&after=%s", params.SubredditType.Code(), params.Subreddit, params.Limit, params.After)
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, http.NoBody)
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if err != nil {
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return posts, errs.Wrapw(err, "reddit: failed to create http request instance", "url", url, "params", params)
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}
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res, err := reddit.Client.Do(req)
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if err != nil {
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return posts, errs.Wrapw(err, "reddit: failed to execute http request", "url", url, "params", params)
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}
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defer res.Body.Close()
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if res.StatusCode != http.StatusOK {
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body, _ := io.ReadAll(res.Body)
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return posts, errs.Fail("reddit: unexpected status code when executing GetPosts",
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slog.Group("request", "url", url, "params", params),
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slog.Group("response", "status_code", res.StatusCode, "body", formatLogBody(res, body)),
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).Code(res.StatusCode)
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}
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err = json.NewDecoder(res.Body).Decode(&posts)
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if err != nil {
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return posts, errs.Wrapw(err, "reddit: failed to parse response body when getting posts from reddit", "url", url, "params", params)
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}
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return posts, nil
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}
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func formatLogBody(res *http.Response, body []byte) any {
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if strings.HasPrefix(res.Header.Get("Content-Type"), "application/json") {
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return json.RawMessage(body)
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}
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return string(body)
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}
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