Added: downloading and returning wikipedia articles

api/article/handler.go

@@ -0,0 +1,78 @@
+package article
+
+import (
+	"net/http"
+	"scrap/api/httpio"
+	"scrap/internal/article"
+	"scrap/internal/db"
+)
+
+func ArticleDownloadHandler(w http.ResponseWriter, r *http.Request) {
+	dbInstance := db.GetInstance()
+	txRepo := db.NewTxRepository(dbInstance)
+	articleRepo := article.NewArticleRepository()
+
+	service := article.NewArticleService(txRepo, articleRepo)
+	if err := service.DownloadArticles(); err != nil {
+		switch err {
+		default:
+			httpio.RaiseOnlyStatusCode(w, http.StatusInternalServerError)
+		}
+
+		return
+	}
+}
+
+func ArticleQueryHandler(w http.ResponseWriter, r *http.Request) {
+	body, err := httpio.ParseURLQuery[ArticleQueryRequest](
+		r,
+		httpio.URLQueryKey[string]("title"),
+	)
+	if err != nil {
+		httpio.RaiseOnlyStatusCode(w, http.StatusInternalServerError)
+		return
+	}
+
+	if httpErr := body.Validate(); httpErr != nil {
+		httpErr.Raise(w)
+		return
+	}
+
+	dbInstance := db.GetInstance()
+	txRepo := db.NewTxRepository(dbInstance)
+	articleRepo := article.NewArticleRepository()
+
+	service := article.NewArticleService(txRepo, articleRepo)
+
+	articleQueryData := article.ArticleQueryDTO{
+		Title: body.Title,
+	}
+
+	articles, err := service.QueryArticles(articleQueryData)
+	if err != nil {
+		switch err {
+		case article.ErrArticleTitleInvalidLength:
+			ErrHttpArticleTitleInvalidLength.Raise(w)
+		default:
+			httpio.RaiseOnlyStatusCode(w, http.StatusInternalServerError)
+		}
+
+		return
+	}
+
+	articlesOut := make([]ArticleResponse, 0, len(articles))
+	for _, a := range articles {
+		ar := ArticleResponse{
+			Uuid:    a.Uuid,
+			Title:   a.Title,
+			Content: a.Content,
+		}
+
+		articlesOut = append(articlesOut, ar)
+	}
+
+	if err = ArticleQueryResponse(articlesOut).Return(w, http.StatusOK); err != nil {
+		httpio.RaiseOnlyStatusCode(w, http.StatusInternalServerError)
+		return
+	}
+}

api/article/httperror.go

@@ -0,0 +1,14 @@
+package article
+
+import (
+	"net/http"
+	"scrap/api/httpio"
+)
+
+var (
+	ErrHttpArticleTitleInvalidLength = httpio.HTTPError{
+		StatusCode: http.StatusBadRequest,
+		ErrorCode:  "ARTICLE_TITLE_LENGTH",
+		Message:    "Invalid title length.",
+	}
+)

api/article/request.go

@@ -0,0 +1,16 @@
+package article
+
+import "scrap/api/httpio"
+
+type ArticleQueryRequest struct {
+	Title string `json:"title"`
+}
+
+func (a ArticleQueryRequest) Validate() *httpio.HTTPError {
+	titleLength := len(a.Title)
+	if titleLength < 1 || titleLength > 255 {
+		return &ErrHttpArticleTitleInvalidLength
+	}
+
+	return nil
+}

api/article/response.go

@@ -0,0 +1,15 @@
+package article
+
+import "scrap/api/httpio"
+
+type ArticleResponse struct {
+	Uuid    string `json:"uuid"`
+	Title   string `json:"title"`
+	Content string `json:"content"`
+}
+
+func ArticleQueryResponse(articles []ArticleResponse) httpio.ResponseIO {
+	return httpio.ResponseIO{
+		"articles": articles,
+	}
+}