112 lines
3.8 KiB
Go
112 lines
3.8 KiB
Go
// Copyright (c) 2018 Vikunja and contributors.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package handler
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import (
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"fmt"
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"github.com/labstack/echo/v4"
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"math"
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"net/http"
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"strconv"
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)
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// ReadAllWeb is the webhandler to get all objects of a type
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func (c *WebHandler) ReadAllWeb(ctx echo.Context) error {
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// Get our model
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currentStruct := c.EmptyStruct()
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currentAuth, err := config.AuthProvider.AuthObject(ctx)
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if err != nil {
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return echo.NewHTTPError(http.StatusInternalServerError, "Could not determine the current user.")
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}
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// Get the object & bind params to struct
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if err := ctx.Bind(currentStruct); err != nil {
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config.LoggingProvider.Debugf("Invalid model error. Internal error was: %s", err.Error())
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if he, is := err.(*echo.HTTPError); is {
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return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("Invalid model provided. Error was: %s", he.Message))
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}
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return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("Invalid model provided."))
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}
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// Pagination
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page := ctx.QueryParam("page")
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if page == "" {
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page = "1"
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}
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pageNumber, err := strconv.Atoi(page)
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if err != nil {
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config.LoggingProvider.Error(err.Error())
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return echo.NewHTTPError(http.StatusBadRequest, "Bad page requested.")
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}
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if pageNumber < 0 {
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return echo.NewHTTPError(http.StatusBadRequest, "Page number cannot be negative.")
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}
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// Items per page
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var perPageNumber int
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perPage := ctx.QueryParam("per_page")
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// If we dont have an "items per page" parameter, we want to use the default.
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// To prevent Atoi from failing, we check this here.
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if perPage != "" {
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perPageNumber, err = strconv.Atoi(perPage)
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if err != nil {
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config.LoggingProvider.Error(err.Error())
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return echo.NewHTTPError(http.StatusBadRequest, "Bad per page amount requested.")
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}
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}
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// Set default page count
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if perPageNumber == 0 {
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perPageNumber = config.MaxItemsPerPage
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}
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if perPageNumber < 1 {
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return echo.NewHTTPError(http.StatusBadRequest, "Per page amount cannot be negative.")
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}
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if perPageNumber > config.MaxItemsPerPage {
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perPageNumber = config.MaxItemsPerPage
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}
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// Search
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search := ctx.QueryParam("s")
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result, resultCount, numberOfItems, err := currentStruct.ReadAll(currentAuth, search, pageNumber, perPageNumber)
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if err != nil {
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return HandleHTTPError(err, ctx)
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}
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// Calculate the number of pages from the number of items
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// We always round up, because if we don't have a number of items which is exactly dividable by the number of items per page,
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// we would get a result that is one page off.
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var numberOfPages = math.Ceil(float64(numberOfItems) / float64(perPageNumber))
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// If we return all results, we only have one page
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if pageNumber < 0 {
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numberOfPages = 1
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}
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// If we don't have results, we don't have a page
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if resultCount == 0 {
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numberOfPages = 0
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}
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ctx.Response().Header().Set("x-pagination-total-pages", strconv.FormatFloat(numberOfPages, 'f', 0, 64))
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ctx.Response().Header().Set("x-pagination-result-count", strconv.FormatInt(int64(resultCount), 10))
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ctx.Response().Header().Set("Access-Control-Expose-Headers", "x-pagination-total-pages, x-pagination-result-count")
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err = ctx.JSON(http.StatusOK, result)
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if err != nil {
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return HandleHTTPError(err, ctx)
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}
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return err
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}
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