private async Task <(string body, string fileName)> PrintImpl(AbstractPrintingTemplate template, PrintArguments args, CancellationToken cancellation)
{
// (1) The templates
var nameP = new TemplatePlanLeaf(template.DownloadName, TemplateLanguage.Text);
var bodyP = new TemplatePlanLeaf(template.Body, TemplateLanguage.Html);
TemplatePlan plan = new TemplatePlanTuple(nameP, bodyP);
if (!string.IsNullOrWhiteSpace(template.Context))
{
plan = new TemplatePlanDefine("$", template.Context, plan);
}
// (2) Functions + Variables
var globalFunctions = new Dictionary <string, EvaluationFunction>();
var localFunctions = new Dictionary <string, EvaluationFunction>();
var globalVariables = new Dictionary <string, EvaluationVariable>();
var localVariables = BaseUtil.CustomLocalVariables(args, template.Parameters?.Select(e => e.Key));
await FactBehavior.SetPrintingFunctions(localFunctions, globalFunctions, cancellation);
await FactBehavior.SetPrintingVariables(localVariables, globalVariables, cancellation);
// (3) Generate output
CultureInfo culture = GetCulture(args.Culture);
var genArgs = new TemplateArguments(globalFunctions, globalVariables, localFunctions, localVariables, culture: culture);
await _templateService.GenerateFromPlan(plan : plan, args : genArgs, cancellation : cancellation);
var downloadName = nameP.Outputs[0];
var body = bodyP.Outputs[0];
// Use a default download name if none is provided
if (string.IsNullOrWhiteSpace(downloadName))
{
downloadName = "File.html";
}
if (!downloadName.ToLower().EndsWith(".html"))
{
downloadName += ".html";
}
// Return as a file
return(new(body, downloadName));
}
/// <summary>
/// Returns a template-generated text file that is evaluated based on the given <paramref name="templateId"/>.
/// The text generation will implicitly contain a variable $ that evaluates to the results of the query specified in <paramref name="args"/>.
/// </summary>
public async Task <FileResult> PrintEntities(int templateId, PrintEntitiesArguments <TKey> args, CancellationToken cancellation)
{
await Initialize(cancellation);
var collection = typeof(TEntity).Name;
var defId = DefinitionId;
// (1) The Template Plan
var template = await FactBehavior.GetPrintingTemplate(templateId, cancellation);
var nameP = new TemplatePlanLeaf(template.DownloadName, TemplateLanguage.Text);
var bodyP = new TemplatePlanLeaf(template.Body, TemplateLanguage.Html);
var printoutP = new TemplatePlanTuple(nameP, bodyP);
TemplatePlan plan;
if (string.IsNullOrWhiteSpace(template.Context))
{
plan = printoutP;
}
else
{
plan = new TemplatePlanDefine("$", template.Context, printoutP);
}
QueryInfo contextQuery = BaseUtil.EntitiesPreloadedQuery(args, collection, defId);
plan = new TemplatePlanDefineQuery("$", contextQuery, plan);
// (2) Functions + Variables
var globalFunctions = new Dictionary <string, EvaluationFunction>();
var localFunctions = new Dictionary <string, EvaluationFunction>();
var globalVariables = new Dictionary <string, EvaluationVariable>();
var localVariables = BaseUtil.EntitiesLocalVariables(args, collection, defId);
await FactBehavior.SetPrintingFunctions(localFunctions, globalFunctions, cancellation);
await FactBehavior.SetPrintingVariables(localVariables, globalVariables, cancellation);
// (3) Generate the output
CultureInfo culture = GetCulture(args.Culture);
var genArgs = new TemplateArguments(globalFunctions, globalVariables, localFunctions, localVariables, culture);
await _templateService.GenerateFromPlan(plan : plan, args : genArgs, cancellation : cancellation);
var downloadName = nameP.Outputs[0];
var body = bodyP.Outputs[0];
// Change the body to bytes
var bodyBytes = Encoding.UTF8.GetBytes(body);
// Use a default download name if none is provided
if (string.IsNullOrWhiteSpace(downloadName))
{
var meta = await GetMetadata(cancellation);
var titlePlural = meta.PluralDisplay();
if (args.I != null && args.I.Count > 0)
{
downloadName = $"{titlePlural} ({args.I.Count})";
}
else
{
int from = args.Skip + 1;
int to = Math.Max(from, args.Skip + args.Top);
downloadName = $"{titlePlural} {from}-{to}";
}
}
if (!downloadName.ToLower().EndsWith(".html"))
{
downloadName += ".html";
}
// Return as a file
return(new FileResult(bodyBytes, downloadName));
}
/// <summary>
/// Returns a template-generated text file that is evaluated based on the given <paramref name="templateId"/>.
/// The text generation will implicitly contain a variable $ that evaluates to the results of the dynamic query specified in <paramref name="args"/>.
/// </summary>
public async Task <FileResult> PrintDynamic(int templateId, PrintDynamicArguments args, CancellationToken cancellation)
{
await Initialize(cancellation);
// (1) Preloaded Query
var collection = typeof(TEntity).Name;
var defId = DefinitionId;
// (2) Functions + Variables
var globalFunctions = new Dictionary <string, EvaluationFunction>();
var localFunctions = new Dictionary <string, EvaluationFunction>();
var globalVariables = new Dictionary <string, EvaluationVariable>();
var localVariables = new Dictionary <string, EvaluationVariable>
{
["$Source"] = new EvaluationVariable($"{collection}/{defId}"),
["$Type"] = new EvaluationVariable(args.Type),
["$Select"] = new EvaluationVariable(args.Select),
["$OrderBy"] = new EvaluationVariable(args.OrderBy),
["$Filter"] = new EvaluationVariable(args.Filter),
["$Having"] = new EvaluationVariable(args.Having),
["$Top"] = new EvaluationVariable(args.Top),
["$Skip"] = new EvaluationVariable(args.Skip)
};
await FactBehavior.SetPrintingFunctions(localFunctions, globalFunctions, cancellation);
await FactBehavior.SetPrintingVariables(localVariables, globalVariables, cancellation);
// (2) The templates
var template = await FactBehavior.GetPrintingTemplate(templateId, cancellation);
var nameP = new TemplatePlanLeaf(template.DownloadName, TemplateLanguage.Text);
var bodyP = new TemplatePlanLeaf(template.Body, TemplateLanguage.Html);
var printoutP = new TemplatePlanTuple(nameP, bodyP);
TemplatePlan plan;
if (string.IsNullOrWhiteSpace(template.Context))
{
IReadOnlyList <DynamicRow> data;
if (args.Type == "Fact")
{
var result = await GetFact(new FactArguments
{
Select = args.Select,
Filter = args.Filter,
OrderBy = args.OrderBy,
Top = args.Top,
Skip = args.Skip,
CountEntities = false,
}, cancellation);
data = result?.Data;
}
else if (args.Type == "Aggregate")
{
var result = await GetAggregate(new GetAggregateArguments
{
Select = args.Select,
Filter = args.Filter,
Having = args.Having,
OrderBy = args.OrderBy,
Top = args.Top,
}, cancellation);
data = result?.Data;
}
else
{
throw new ServiceException($"Unknown Type '{args.Type}'.");
}
localVariables.Add("$", new EvaluationVariable(data));
plan = printoutP;
}
else
{
plan = new TemplatePlanDefine("$", template.Context, printoutP);
}
// (4) Culture
CultureInfo culture = GetCulture(args.Culture);
// Generate the output
var genArgs = new TemplateArguments(globalFunctions, globalVariables, localFunctions, localVariables, culture);
await _templateService.GenerateFromPlan(plan, genArgs, cancellation);
var downloadName = nameP.Outputs[0];
var body = bodyP.Outputs[0];
// Change the body to bytes
var bodyBytes = Encoding.UTF8.GetBytes(body);
// Use a default download name if none is provided
if (string.IsNullOrWhiteSpace(downloadName))
{
var meta = await GetMetadata(cancellation);
downloadName = meta.PluralDisplay();
}
if (!downloadName.ToLower().EndsWith(".html"))
{
downloadName += ".html";
}
// Return as a file
return(new FileResult(bodyBytes, downloadName));
}
/// <summary>
/// Returns a template-generated text file that is evaluated based on the given <paramref name="templateId"/>.
/// The text generation will implicitly contain a variable $ that evaluates to the entity whose id matches <paramref name="id"/>.
/// </summary>
public async Task <(byte[] FileBytes, string FileName)> PrintEntity(TKey id, int templateId, PrintEntityByIdArguments args, CancellationToken cancellation)
{
await Initialize(cancellation);
// (1) Collection & DefId
var collection = typeof(TEntity).Name;
var defId = DefinitionId;
// (2) The Template Plan
var template = await FactBehavior.GetPrintingTemplate(templateId, cancellation);
var nameP = new TemplatePlanLeaf(template.DownloadName, TemplateLanguage.Text);
var bodyP = new TemplatePlanLeaf(template.Body, TemplateLanguage.Html);
var printoutP = new TemplatePlanTuple(nameP, bodyP);
TemplatePlan plan;
if (string.IsNullOrWhiteSpace(template.Context))
{
plan = printoutP;
}
else
{
plan = new TemplatePlanDefine("$", template.Context, printoutP);
}
QueryInfo contextQuery = BaseUtil.EntityPreloadedQuery(id, args, collection, defId);
plan = new TemplatePlanDefineQuery("$", contextQuery, plan);
// (3) Functions + Variables
var globalFunctions = new Dictionary <string, EvaluationFunction>();
var localFunctions = new Dictionary <string, EvaluationFunction>();
var globalVariables = new Dictionary <string, EvaluationVariable>();
var localVariables = BaseUtil.EntityLocalVariables(id, args, collection, defId);
await FactBehavior.SetPrintingFunctions(localFunctions, globalFunctions, cancellation);
await FactBehavior.SetPrintingVariables(localVariables, globalVariables, cancellation);
// (4) Generate the output
CultureInfo culture = GetCulture(args.Culture);
var genArgs = new TemplateArguments(globalFunctions, globalVariables, localFunctions, localVariables, culture);
await _templateService.GenerateFromPlan(plan, genArgs, cancellation);
var downloadName = nameP.Outputs[0];
var body = bodyP.Outputs[0];
// Change the body to bytes
var bodyBytes = Encoding.UTF8.GetBytes(body);
// Do some sanitization of the downloadName
if (string.IsNullOrWhiteSpace(downloadName))
{
downloadName = id.ToString();
}
if (!downloadName.ToLower().EndsWith(".html"))
{
downloadName += ".html";
}
// Return as a file
return(bodyBytes, downloadName);
}