107 lines
2.9 KiB
Go
107 lines
2.9 KiB
Go
package routes
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import (
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"errors"
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"net/http"
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"strconv"
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"git.artlef.fr/bibliomane/internal/appcontext"
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"git.artlef.fr/bibliomane/internal/dto"
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"git.artlef.fr/bibliomane/internal/i18nresource"
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"git.artlef.fr/bibliomane/internal/model"
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"git.artlef.fr/bibliomane/internal/myvalidator"
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"git.artlef.fr/bibliomane/internal/query"
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"github.com/gin-gonic/gin"
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"gorm.io/gorm"
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)
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func PostCollectionChangePositionHandler(ac appcontext.AppContext) {
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collectionId, err := strconv.ParseUint(ac.C.Param("id"), 10, 64)
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if err != nil {
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ac.C.JSON(http.StatusBadRequest, gin.H{"error": err})
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return
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}
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user, err := ac.GetAuthenticatedUser()
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if err != nil {
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myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
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return
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}
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var collection model.Collection
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err = ac.Db.First(&collection, collectionId).Error
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if err != nil {
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myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
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return
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}
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if collection.UserID != user.ID {
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err := myvalidator.HttpError{
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StatusCode: http.StatusUnauthorized,
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Err: errors.New(i18nresource.GetTranslatedMessage(&ac, "Unauthorized")),
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}
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myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
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return
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}
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var collectionBookPosition dto.CollectionItemPosition
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err = ac.C.ShouldBindJSON(&collectionBookPosition)
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if err != nil {
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myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
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return
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}
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var item model.CollectionItem
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err = ac.Db.First(&item, collectionBookPosition.ItemID).Error
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if err != nil {
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myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
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return
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}
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if collection.ID != item.CollectionID {
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err := myvalidator.HttpError{
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StatusCode: http.StatusInternalServerError,
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Err: errors.New(i18nresource.GetTranslatedMessage(&ac, "ItemDoesNotBelongToCollection")),
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}
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myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
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return
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}
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count, err := query.FetchCollectionBooksCount(ac.Db, user.ID, item.CollectionID)
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if err != nil {
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myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
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return
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}
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newPosition := collectionBookPosition.Position
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if int64(newPosition) > count {
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newPosition = uint(count)
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}
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if item.Position == collectionBookPosition.Position {
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//nothing to do
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ac.C.String(http.StatusOK, "Success")
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return
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}
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lowerPosition := item.Position + 1
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higherPosition := item.Position - 1
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operationToDo := ""
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if item.Position < collectionBookPosition.Position {
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higherPosition = collectionBookPosition.Position
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operationToDo = "position - 1"
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} else {
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lowerPosition = collectionBookPosition.Position
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operationToDo = "position + 1"
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}
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q := ac.Db.Model(&model.CollectionItem{})
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q = q.Where("collection_id = ? AND position BETWEEN ? AND ?", collection.ID, lowerPosition, higherPosition)
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err = q.UpdateColumn("position", gorm.Expr(operationToDo)).Error
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if err != nil {
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myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
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return
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}
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item.Position = collectionBookPosition.Position
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ac.Db.Save(&item)
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ac.C.String(http.StatusOK, "Success")
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}
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