Splat handler in their own files, added pagination

internal/articles/get.go

@@ -0,0 +1,80 @@
+package articles
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"strconv"
+
+	"github.com/Floriansylvain/GohCMS/internal/api"
+	"github.com/Floriansylvain/GohCMS/internal/database"
+	"github.com/gin-gonic/gin"
+)
+
+func getApiFullUrl() string {
+	return fmt.Sprintf("%v%v", os.Getenv("APP_API_ADDRESS"), os.Getenv("APP_BASE_API_PATH"))
+}
+
+func getArticleSkipTakeFullUrl(skip uint64, take uint64) string {
+	return fmt.Sprintf("%v/articles?skip=%v&take=%v", getApiFullUrl(), skip+take, take)
+}
+
+func getBuiltGetResponse(articles []Article, skip uint64, take uint64) map[string]any {
+	slicedArticles := articles[skip : skip+take]
+	return map[string]any{
+		"content": slicedArticles,
+		"total":   len(slicedArticles),
+		"pagination": map[string]any{
+			"skip": skip,
+			"take": take,
+			"links": map[string]any{
+				"next":     getArticleSkipTakeFullUrl(skip+take, take),
+				"previous": getArticleSkipTakeFullUrl(skip-take, take),
+			},
+		},
+	}
+}
+
+func parseUintQueryParam(c *gin.Context, param string) (uint64, error) {
+	value, err := strconv.ParseUint(c.Query(param), 10, 0)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, fmt.Sprintf("%s query parameter must be a positive number.", param))
+	}
+	return value, err
+}
+
+func getArticleIdFilter(titleID string) map[string]any {
+	filter := map[string]any{}
+	if titleID != "" {
+		filter["titleID"] = titleID
+	}
+	return filter
+}
+
+func Get(c *gin.Context) {
+	titleID := c.Params.ByName("id")
+
+	skip, skipErr := parseUintQueryParam(c, "skip")
+	take, takeErr := parseUintQueryParam(c, "take")
+	if skipErr != nil || takeErr != nil {
+		return
+	}
+
+	articles, err := database.GetDocuments(articlesLocation, getArticleIdFilter(titleID))
+	if err != nil {
+		api.SendBadRequest(c, fmt.Sprintf("The ID '%v' doesn't match any article.", titleID))
+		return
+	}
+
+	articlesArray := ParseArticlesFromBytesToArray(articles)
+	articlesArrayLength := uint64(len(articlesArray))
+	if skip >= articlesArrayLength || take == 0 {
+		c.JSON(http.StatusOK, map[string]any{
+			"content": []string{},
+			"total":   "0",
+		})
+		return
+	}
+
+	c.JSON(http.StatusOK, getBuiltGetResponse(articlesArray, skip, take))
+}