mirror of https://github.com/acanas/swad-core.git
494 lines
16 KiB
C
494 lines
16 KiB
C
// swad_alert.c: alerts
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/*
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SWAD (Shared Workspace At a Distance),
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is a web platform developed at the University of Granada (Spain),
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and used to support university teaching.
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This file is part of SWAD core.
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Copyright (C) 1999-2019 Antonio Cañas Vargas
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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 Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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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 Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*****************************************************************************/
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/********************************* Headers ***********************************/
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/*****************************************************************************/
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#define _GNU_SOURCE // For vasprintf
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#include <linux/stddef.h> // For NULL
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#include <stdarg.h> // For va_start, va_end
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#include <stdio.h> // For FILE, fprintf, vasprintf
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#include <stdlib.h> // For free
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#include <string.h> // For string functions
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#include "swad_alert.h"
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#include "swad_form.h"
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#include "swad_global.h"
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/*****************************************************************************/
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/************** External global variables from others modules ****************/
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/*****************************************************************************/
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extern struct Globals Gbl;
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/*****************************************************************************/
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/****************************** Public constants *****************************/
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/*****************************************************************************/
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/*****************************************************************************/
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/***************************** Private constants *****************************/
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/*****************************************************************************/
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static const char *Ale_AlertIcons[Ale_NUM_ALERT_TYPES] =
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{
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NULL, // Ale_NONE
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"clipboard.svg", // Ale_CLIPBOARD
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"info-circle.svg", // Ale_INFO
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"check-circle.svg", // Ale_SUCCESS
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"question64x64.gif", // Ale_QUESTION animated gif
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"warning64x64.gif", // Ale_WARNING animated gif
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"error64x64.gif", // Ale_ERROR animated gif
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};
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/*****************************************************************************/
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/******************************* Private types *******************************/
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/*****************************************************************************/
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/*****************************************************************************/
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/***************************** Private prototypes ****************************/
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/*****************************************************************************/
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static void Ale_ResetLastAlert (void);
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static void Ale_ResetAlert (size_t i);
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static void Ale_ShowFixAlert (Ale_AlertType_t AlertType,const char *Txt);
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static void Ale_ShowFixAlertAndButton1 (Ale_AlertType_t AlertType,const char *Txt);
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/*****************************************************************************/
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/**************************** Create a new alert *****************************/
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/*****************************************************************************/
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void Ale_CreateAlert (Ale_AlertType_t Type,const char *Section,
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const char *fmt,...)
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{
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va_list ap;
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int NumBytesPrinted;
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size_t i;
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if (Gbl.Alerts.Num + 1 > Ale_MAX_ALERTS)
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Lay_ShowErrorAndExit ("Too many alerts.");
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i = Gbl.Alerts.Num;
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Gbl.Alerts.Num++;
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Gbl.Alerts.List[i].Type = Type;
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Gbl.Alerts.List[i].Section = NULL;
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if (Section)
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if (Section[0])
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if (asprintf (&Gbl.Alerts.List[i].Section,"%s",
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Section) < 0)
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Lay_NotEnoughMemoryExit ();
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va_start (ap,fmt);
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NumBytesPrinted = vasprintf (&Gbl.Alerts.List[i].Text,fmt,ap);
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va_end (ap);
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if (NumBytesPrinted < 0) // If memory allocation wasn't possible,
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// or some other error occurs,
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// vasprintf will return -1
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Lay_NotEnoughMemoryExit ();
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}
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/*****************************************************************************/
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/***************** Get current number of delayed alerts **********************/
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/*****************************************************************************/
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size_t Ale_GetNumAlerts (void)
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{
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return Gbl.Alerts.Num;
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}
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/*****************************************************************************/
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/********************** Get type of last delayed alert ***********************/
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/*****************************************************************************/
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Ale_AlertType_t Ale_GetTypeOfLastAlert (void)
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{
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return Gbl.Alerts.Num ? Gbl.Alerts.List[Gbl.Alerts.Num - 1].Type :
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Ale_NONE;
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}
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/*****************************************************************************/
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/********************** Get text of last delayed alert ***********************/
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/*****************************************************************************/
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const char *Ale_GetTextOfLastAlert (void)
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{
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return Gbl.Alerts.Num ? Gbl.Alerts.List[Gbl.Alerts.Num - 1].Text :
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NULL;
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}
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/*****************************************************************************/
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/***************************** Reset all alerts ******************************/
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/*****************************************************************************/
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void Ale_ResetAllAlerts (void)
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{
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size_t i;
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for (i = 0;
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i < Gbl.Alerts.Num;
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i++)
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Ale_ResetAlert (i);
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}
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/*****************************************************************************/
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/************************* Reset more recent alert ***************************/
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/*****************************************************************************/
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static void Ale_ResetLastAlert (void)
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{
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if (Gbl.Alerts.Num) // There are pending alerts no shown
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Ale_ResetAlert (Gbl.Alerts.Num - 1); // Reset the last one
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}
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/*****************************************************************************/
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/********************* Reset one alert given its index ***********************/
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/*****************************************************************************/
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static void Ale_ResetAlert (size_t i)
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{
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bool NoMoreAlertsPending;
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size_t j;
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if (i < Gbl.Alerts.Num)
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if (Gbl.Alerts.List[i].Type != Ale_NONE)
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{
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/***** Reset i-esim alert *****/
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Gbl.Alerts.List[i].Type = Ale_NONE; // Reset alert
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/***** Free memory allocated for text *****/
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if (Gbl.Alerts.List[i].Text)
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{
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free ((void *) Gbl.Alerts.List[i].Text);
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Gbl.Alerts.List[i].Text = NULL;
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}
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/***** Free memory allocated for section *****/
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if (Gbl.Alerts.List[i].Section)
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{
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free ((void *) Gbl.Alerts.List[i].Section);
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Gbl.Alerts.List[i].Section = NULL;
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}
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}
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/***** Set number of alerts to 0
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if there are no more alerts
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pending to be shown *****/
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NoMoreAlertsPending = true;
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for (j = 0;
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NoMoreAlertsPending && j < Gbl.Alerts.Num;
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j++)
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if (Gbl.Alerts.List[j].Type != Ale_NONE)
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NoMoreAlertsPending = false;
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if (NoMoreAlertsPending)
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Gbl.Alerts.Num = 0;
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}
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/*****************************************************************************/
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/************************ Show alert messages and exit ***********************/
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/*****************************************************************************/
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void Ale_ShowAlertsAndExit ()
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{
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Ale_ShowAlerts (NULL);
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Lay_ShowErrorAndExit (NULL);
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}
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/*****************************************************************************/
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/****** Show several alert messages stored in vector of delayed alerts *******/
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/*****************************************************************************/
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// If Section == NULL ==> show all alerts
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// If Section != NULL ==> shown only the alerts assigned to Section
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void Ale_ShowAlerts (const char *Section)
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{
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size_t i;
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bool ShowAlert;
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size_t NumAlerts = Ale_GetNumAlerts ();
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for (i = 0;
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i < NumAlerts;
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i++)
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if (Gbl.Alerts.List[i].Type != Ale_NONE)
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{
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if (Section)
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ShowAlert = (bool) !strcmp (Gbl.Alerts.List[i].Section,Section);
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else
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ShowAlert = true;
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if (ShowAlert)
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{
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Ale_ShowFixAlert (Gbl.Alerts.List[i].Type,
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Gbl.Alerts.List[i].Text);
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Ale_ResetAlert (i);
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}
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}
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}
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/*****************************************************************************/
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/****************** Show one formatted-text alert message ********************/
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/*****************************************************************************/
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void Ale_ShowAlert (Ale_AlertType_t AlertType,const char *fmt,...)
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{
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va_list ap;
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int NumBytesPrinted;
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char *Txt;
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if (AlertType != Ale_NONE)
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{
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/***** Print format and list of variables into text *****/
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va_start (ap,fmt);
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NumBytesPrinted = vasprintf (&Txt,fmt,ap);
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va_end (ap);
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if (NumBytesPrinted < 0) // If memory allocation wasn't possible,
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// or some other error occurs,
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// vasprintf will return -1
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Lay_NotEnoughMemoryExit ();
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/***** Show alert *****/
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Ale_ShowFixAlert (AlertType,Txt);
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/***** Free text *****/
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free ((void *) Txt);
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}
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}
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/*****************************************************************************/
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/********************** Show one fix-text alert message **********************/
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/*****************************************************************************/
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static void Ale_ShowFixAlert (Ale_AlertType_t AlertType,const char *Txt)
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{
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if (AlertType != Ale_NONE)
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{
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/****** Print fix alert and button ******/
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Ale_ShowFixAlertAndButton1 (AlertType,Txt);
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Ale_ShowAlertAndButton2 (ActUnk,NULL,NULL,
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NULL,Btn_NO_BUTTON,NULL);
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}
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}
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/*****************************************************************************/
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/**************** Show the more recent alert with a button *******************/
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/*****************************************************************************/
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void Ale_ShowLastAlertAndButton (Act_Action_t NextAction,const char *Anchor,
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const char *OnSubmit,void (*FuncParams) (),
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Btn_Button_t Button,const char *TxtButton)
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{
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/***** Show last alert and then reset it *****/
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Ale_ShowLastAlertAndButton1 ();
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/***** Show button *****/
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Ale_ShowAlertAndButton2 (NextAction,Anchor,OnSubmit,
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FuncParams,Button,TxtButton);
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}
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/*****************************************************************************/
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/********** Show the first part of more recent alert with a button ***********/
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/*****************************************************************************/
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void Ale_ShowLastAlertAndButton1 (void)
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{
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/***** Show last alert *****/
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Ale_ShowFixAlertAndButton1 (Ale_GetTypeOfLastAlert (),Ale_GetTextOfLastAlert ());
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/***** Reset last alert *****/
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Ale_ResetLastAlert ();
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}
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/*****************************************************************************/
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/*********************** Show an alert with a button *************************/
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/*****************************************************************************/
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void Ale_ShowAlertAndButton (Act_Action_t NextAction,const char *Anchor,
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const char *OnSubmit,void (*FuncParams) (),
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Btn_Button_t Button,const char *TxtButton,
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Ale_AlertType_t AlertType,const char *fmt,...)
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{
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va_list ap;
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int NumBytesPrinted;
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char *Txt;
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/***** Print format and list of variables into text *****/
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va_start (ap,fmt);
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NumBytesPrinted = vasprintf (&Txt,fmt,ap);
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va_end (ap);
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if (NumBytesPrinted < 0) // If memory allocation wasn't possible,
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// or some other error occurs,
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// vasprintf will return -1
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Lay_NotEnoughMemoryExit ();
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/****** Print fix alert and button ******/
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Ale_ShowFixAlertAndButton1 (AlertType,Txt);
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Ale_ShowAlertAndButton2 (NextAction,Anchor,OnSubmit,
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FuncParams,Button,TxtButton);
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/***** Free text *****/
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free ((void *) Txt);
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}
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/*****************************************************************************/
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/******** Show the first part of a formatted-text alert with a button ********/
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/*****************************************************************************/
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void Ale_ShowAlertAndButton1 (Ale_AlertType_t AlertType,const char *fmt,...)
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{
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va_list ap;
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int NumBytesPrinted;
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char *Txt;
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/***** Print format and list of variables into text *****/
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va_start (ap,fmt);
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NumBytesPrinted = vasprintf (&Txt,fmt,ap);
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va_end (ap);
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if (NumBytesPrinted < 0) // If memory allocation wasn't possible,
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// or some other error occurs,
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// vasprintf will return -1
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Lay_NotEnoughMemoryExit ();
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/****** Print start of fix alert and button ******/
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Ale_ShowFixAlertAndButton1 (AlertType,Txt);
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/***** Free text *****/
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free ((void *) Txt);
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}
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/*****************************************************************************/
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/*********** Show the first part of a fix-text alert with a button ***********/
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/*****************************************************************************/
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static void Ale_ShowFixAlertAndButton1 (Ale_AlertType_t AlertType,const char *Txt)
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{
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extern const char *Txt_Close;
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char IdAlert[Frm_MAX_BYTES_ID + 1];
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static const bool AlertClosable[Ale_NUM_ALERT_TYPES] =
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{
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false, // Ale_NONE
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true, // Ale_CLIPBOARD
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true, // Ale_INFO
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true, // Ale_SUCCESS
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true, // Ale_QUESTION
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true, // Ale_WARNING
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true, // Ale_ERROR
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};
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/****** If start of page is not written yet, do it now ******/
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if (!Gbl.Layout.HTMLStartWritten)
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Lay_WriteStartOfPage ();
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/***** Start box *****/
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fprintf (Gbl.F.Out,"<div");
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if (AlertClosable[AlertType])
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{
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/* Create unique id for alert */
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Frm_SetUniqueId (IdAlert);
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fprintf (Gbl.F.Out," id=\"%s\"",IdAlert);
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}
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fprintf (Gbl.F.Out," class=\"CENTER_MIDDLE\">"
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"<div class=\"ALERT\">");
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/***** Icon to close the alert *****/
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if (AlertClosable[AlertType])
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fprintf (Gbl.F.Out,"<div class=\"ALERT_CLOSE\">"
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"<a href=\"\""
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" onclick=\"toggleDisplay('%s');return false;\" />"
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"<img src=\"%s/close.svg\""
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" alt=\"%s\" title=\"%s\""
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" class=\"ICO16x16\" />"
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"</a>"
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"</div>",
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IdAlert,
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Cfg_URL_ICON_PUBLIC,
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Txt_Close,Txt_Close);
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/***** Write message *****/
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fprintf (Gbl.F.Out,"<div class=\"ALERT_TXT\"");
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if (AlertType != Ale_NONE)
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fprintf (Gbl.F.Out," style=\"background-image:url('%s/%s');\"",
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Cfg_URL_ICON_PUBLIC,Ale_AlertIcons[AlertType]);
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fprintf (Gbl.F.Out,">%s"
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"</div>",
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Txt);
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}
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/*****************************************************************************/
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/*************** Show the second part of an alert with a button **************/
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/*****************************************************************************/
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void Ale_ShowAlertAndButton2 (Act_Action_t NextAction,const char *Anchor,const char *OnSubmit,
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void (*FuncParams) (),
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Btn_Button_t Button,const char *TxtButton)
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{
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/***** Optional button *****/
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if (NextAction != ActUnk &&
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Button != Btn_NO_BUTTON &&
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TxtButton)
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if (TxtButton[0])
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{
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/* Start form */
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Frm_StartFormAnchorOnSubmit (NextAction,Anchor,OnSubmit);
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if (FuncParams)
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FuncParams ();
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/* Put button *****/
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Btn_PutButton (Button,TxtButton);
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/* End form */
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Frm_EndForm ();
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}
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/***** End box *****/
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fprintf (Gbl.F.Out,"</div>"
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"</div>");
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}
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/*****************************************************************************/
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/** Create alert when user not found or no permission to perform an action ***/
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/*****************************************************************************/
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void Ale_CreateAlertUserNotFoundOrYouDoNotHavePermission (void)
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{
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extern const char *Txt_User_not_found_or_you_do_not_have_permission_;
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Ale_CreateAlert (Ale_WARNING,NULL,
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Txt_User_not_found_or_you_do_not_have_permission_);
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}
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/*****************************************************************************/
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/*** Show alert when user not found or no permission to perform an action ****/
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/*****************************************************************************/
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void Ale_ShowAlertUserNotFoundOrYouDoNotHavePermission (void)
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{
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extern const char *Txt_User_not_found_or_you_do_not_have_permission_;
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Ale_ShowAlert (Ale_WARNING,Txt_User_not_found_or_you_do_not_have_permission_);
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}
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