Implements create feed handler

And necessary user helper functions

internal/api/feed.go

@@ -0,0 +1,58 @@
+package api
+
+import (
+	"fmt"
+	"freed/internal/model"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v2/log"
+	"github.com/mattn/go-sqlite3"
+)
+
+func (h *Handler) createFeed(c *fiber.Ctx) error {
+	userID := c.Params("userID")
+	feed := new(model.Feed)
+
+	if parseErr := c.BodyParser(feed); parseErr != nil {
+		log.Warn(parseErr)
+		return defaultUserError
+	}
+
+	validationErr := ValidateModel(feed)
+
+	if validationErr != nil {
+		return fiber.NewError(fiber.ErrInternalServerError.Code, validationErr.Message)
+	}
+
+	userExists := h.userExists(userID)
+	fmt.Printf("exists? %v", userExists)
+
+	if h.userExists(userID) == false {
+		return fiber.NewError(fiber.ErrInternalServerError.Code, "No existing user found, check user id path param.")
+	}
+
+	// TODO: Get name from feed
+	// TODO: Get type from feed
+	// TODO: Either schedule or request items from feed immediately
+
+	sqlResult, insertErr := h.db.Exec("INSERT INTO feed (userId, name, url) VALUES (?, ?, ?)", userID, feed.Url, feed.Url)
+
+	if sqliteErr, ok := insertErr.(sqlite3.Error); ok {
+		log.Warn(insertErr)
+
+		if sqliteErr.ExtendedCode == sqlite3.ErrConstraintUnique {
+			return fiber.NewError(fiber.StatusBadRequest, "Feed with url already exists")
+		}
+
+		return fiber.NewError(fiber.ErrInternalServerError.Code, "Could not create feed")
+	}
+
+	feedID, idErr := sqlResult.LastInsertId()
+
+	if idErr != nil {
+		return fiber.NewError(fiber.ErrInternalServerError.Code, "Created feed, but could not retrieve its ID, check database.")
+	}
+
+	c.SendStatus(201)
+	return c.JSON(&fiber.Map{"id": feedID})
+}