/// <summary>
/// Determines whether the specified command is authorized within the context.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="command">The command.</param>
/// <returns>
/// <c>true</c> if the specified command is authorized; otherwise, <c>false</c>.
/// </returns>
public static bool IsAuthorized(ILavaRenderContext context, string command)
{
if (command.IsNullOrWhiteSpace())
{
return(false);
}
var enabledCommands = context.GetEnabledCommands();
if (enabledCommands.Any())
{
if (enabledCommands.Contains("All", StringComparer.OrdinalIgnoreCase) ||
enabledCommands.Contains(command, StringComparer.OrdinalIgnoreCase))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Renders the specified context.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="result">The result.</param>
public override void OnRender(ILavaRenderContext context, TextWriter result)
{
if (_shortcode == null)
{
result.Write($"An error occurred while processing the {0} shortcode.", _tagName);
}
// Get the parameters and default values defined by the shortcode, then apply the parameters that have been specified in the shortcode tag attributes
// and those that are stored in the current render context.
var parms = new Dictionary <string, object>();
foreach (var shortcodeParm in _shortcode.Parameters)
{
parms.AddOrReplace(shortcodeParm.Key, shortcodeParm.Value);
}
SetParametersFromElementAttributes(parms, _elementAttributesMarkup, context);
// Set a unique id for the shortcode.
parms.AddOrReplace("uniqueid", "id-" + Guid.NewGuid().ToString());
// Apply the merge fields in the block context.
var internalMergeFields = context.GetMergeFields();
foreach (var item in parms)
{
internalMergeFields.AddOrReplace(item.Key, item.Value);
}
// Add parameters for tracking the recursion depth.
int currentRecursionDepth = 0;
if (parms.ContainsKey("RecursionDepth"))
{
currentRecursionDepth = parms["RecursionDepth"].ToString().AsInteger() + 1;
if (currentRecursionDepth > _maxRecursionDepth)
{
result.Write("A recursive loop was detected and processing of this shortcode has stopped.");
return;
}
}
parms.AddOrReplace("RecursionDepth", currentRecursionDepth);
// Resolve the merge fields in the shortcode template in a separate context, using the set of merge fields that have been modified by the shortcode parameters.
// Apply the set of enabled commands specified by the shortcode definition, or those enabled for the current context if none are defined by the shortcode.
// The resulting content is a shortcode template that is ready to be processed to resolve its child elements.
var enabledCommands = _shortcode.EnabledLavaCommands ?? new List <string>();
enabledCommands = enabledCommands.Where(x => !string.IsNullOrWhiteSpace(x)).ToList();
if (!enabledCommands.Any())
{
enabledCommands = context.GetEnabledCommands();
}
var shortcodeTemplateContext = _engine.NewRenderContext(internalMergeFields, enabledCommands);
var blockMarkupRenderResult = _engine.RenderTemplate(_blockMarkup.ToString(), LavaRenderParameters.WithContext(shortcodeTemplateContext));
var shortcodeTemplateMarkup = blockMarkupRenderResult.Text;
// Extract child elements from the shortcode template content.
// One or more child elements can be added to a shortcode block using the syntax "[[ <childElementName> <paramName1>:value1 <paramName2>:value2 ... ]] ... [[ end<childElementName> ]]",
// where <childElementName> is a shortcode-specific tag name, <param1> is a shortcode parameter name, and <value1> is the parameter value.
// Child elements are grouped by <childElementName>, and each collection is passed as a separate parameter to the shortcode template
// using the variable name "<childElementNameItems>". The first element of the array is also added using the variable name "<childElementName>".
// Parameters declared on child elements can be referenced in the shortcode template as <childElementName>.<paramName>.
Dictionary <string, object> childElements;
var residualMarkup = ExtractShortcodeBlockChildElements(shortcodeTemplateMarkup, out childElements);
// Add the collections of child to the set of parameters that will be passed to the shortcode template.
foreach (var item in childElements)
{
parms.AddOrReplace(item.Key, item.Value);
}
// Set context variables related to the block content so they can be referenced by the shortcode template.
if (residualMarkup.IsNotNullOrWhiteSpace())
{
// JME (7/23/2019) Commented out the two lines below and substituted the line after to allow for better
// processing of the block content. Testing was done on all existing shortcodes but leaving
// this code in place in case a future edge case is found. Could/should remove this in the future.
// Regex rgx = new Regex( @"{{\s*blockContent\s*}}", RegexOptions.IgnoreCase );
// lavaTemplate = rgx.Replace( lavaTemplate, blockMarkup );
parms.AddOrReplace("blockContent", residualMarkup);
parms.AddOrReplace("blockContentExists", true);
}
else
{
parms.AddOrReplace("blockContentExists", false);
}
// Now ensure there aren't any entity commands in the block that are not allowed.
// This is necessary because the shortcode may be configured to allow more entities for processing
// than the source block, template, action, etc. permits.
var securityCheckResult = _engine.RenderTemplate(residualMarkup, LavaRenderParameters.WithContext(context));
Regex securityErrorPattern = new Regex(string.Format(Constants.Messages.NotAuthorizedMessage, ".*"));
Match securityErrorMatch = securityErrorPattern.Match(securityCheckResult.Text);
// If the security check failed, return the error message.
if (securityErrorMatch.Success)
{
result.Write(securityErrorMatch.Value);
return;
}
// Merge the shortcode template in a new context, using the parameters and security allowed by the shortcode.
var shortcodeContext = _engine.NewRenderContext(parms);
// If the shortcode specifies a set of enabled Lava commands, set these for the current context.
// If not, use the commands enabled for the current context.
if (_shortcode.EnabledLavaCommands != null &&
_shortcode.EnabledLavaCommands.Any())
{
shortcodeContext.SetEnabledCommands(_shortcode.EnabledLavaCommands);
}
else
{
shortcodeContext.SetEnabledCommands(context.GetEnabledCommands());
}
var results = _engine.RenderTemplate(_shortcode.TemplateMarkup, LavaRenderParameters.WithContext(shortcodeContext));
result.Write(results.Text.Trim());
}
/// <summary>
/// Renders the specified context.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="result">The result.</param>
public override void OnRender(ILavaRenderContext context, TextWriter result)
{
var rockContext = LavaHelper.GetRockContextFromLavaContext(context);
// Get enabled security commands
_enabledSecurityCommands = context.GetEnabledCommands().JoinStrings(",");
using (TextWriter writer = new StringWriter())
{
bool filterProvided = false;
base.OnRender(context, writer);
var parms = ParseMarkup(_markup, context);
var lookAheadDays = parms[LOOK_AHEAD_DAYS].AsInteger();
var scheduleCategoryId = parms[SCHEDULE_CATEGORY_ID].AsIntegerOrNull();
var asAtDate = parms[AS_AT_DATE].AsDateTime();
var now = asAtDate ?? RockDateTime.Now;
var scheduleIds = new List <int>();
var requestedSchedules = parms[SCHEDULE_ID].StringToIntList();
var schedulesQry = new ScheduleService(rockContext).Queryable().AsNoTracking()
.Where(s => s.IsActive == true);
if (requestedSchedules.Count() > 0)
{
schedulesQry = schedulesQry.Where(s => requestedSchedules.Contains(s.Id));
filterProvided = true;
}
if (scheduleCategoryId.HasValue)
{
schedulesQry = schedulesQry.Where(s => s.CategoryId == scheduleCategoryId.Value);
filterProvided = true;
}
// If neither a schedule id nor a schedule category id was provided stop
if (!filterProvided)
{
return;
}
// Get the schedules are order them by the next start time
var schedules = schedulesQry.ToList()
.Where(s => s.GetNextStartDateTime(now) != null)
.OrderBy(s => s.GetNextStartDateTime(now));
if (schedules.Count() == 0)
{
return;
}
var nextSchedule = schedules.FirstOrDefault();
var nextStartDateTime = nextSchedule.GetNextStartDateTime(now);
var isLive = false;
DateTime?occurrenceEndDateTime = null;
// Determine if we're live
if (nextSchedule.WasScheduleActive(now))
{
isLive = true;
var occurrences = nextSchedule.GetICalOccurrences(now, now.AddDays(lookAheadDays)).Take(2);
var activeOccurrence = occurrences.FirstOrDefault();
occurrenceEndDateTime = (DateTime)activeOccurrence.Period.EndTime.Value;
// Set the next occurrence to be the literal next occurrence (vs the current occurrence)
nextStartDateTime = null;
if (occurrences.Count() > 1)
{
nextStartDateTime = occurrences.Last().Period.EndTime.Value;
}
}
// Determine when not to show the content
if ((parms[SHOW_WHEN] == "notlive" && isLive) ||
(parms[SHOW_WHEN] == "live" && !isLive))
{
return;
}
// Check role membership
var roleId = parms[ROLE_ID].AsIntegerOrNull();
if (roleId.HasValue)
{
var currentPerson = GetCurrentPerson(context);
var isInRole = new GroupMemberService(rockContext).Queryable()
.Where(m =>
m.GroupId == roleId &&
m.PersonId == currentPerson.Id
)
.Any();
if (!isInRole)
{
return;
}
}
var mergeFields = context.GetMergeFields();
mergeFields.Add("NextOccurrenceDateTime", nextStartDateTime);
mergeFields.Add("OccurrenceEndDateTime", occurrenceEndDateTime);
mergeFields.Add("Schedule", nextSchedule);
mergeFields.Add("IsLive", isLive);
var engine = context.GetService <ILavaEngine>();
var renderContext = engine.NewRenderContext(mergeFields, _enabledSecurityCommands.SplitDelimitedValues());
var results = engine.RenderTemplate(_blockMarkup.ToString(), LavaRenderParameters.WithContext(renderContext));
result.Write(results.Text.Trim());
}
}
