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using System.Text;
namespace NpgsqlRest.TsClient;
public class TsClient(TsClientOptions options) : IEndpointCreateHandler
{
private IApplicationBuilder _builder = default!;
private ILogger? _logger;
private NpgsqlRestOptions? _npgsqlRestoptions;
public TsClient(string filePath) : this(new TsClientOptions(filePath)) { }
public TsClient(string filePath,
bool fileOverwrite = false,
bool includeHost = false,
string? customHost = null,
CommentHeader commentHeader = CommentHeader.Simple,
bool includeStatusCode = false) : this(new TsClientOptions(filePath, fileOverwrite, includeHost, customHost, commentHeader, includeStatusCode)) { }
public void Setup(IApplicationBuilder builder, ILogger? logger, NpgsqlRestOptions options)
{
if (builder is WebApplication app)
{
var factory = app.Services.GetRequiredService<ILoggerFactory>();
if (factory is not null)
{
_logger = factory.CreateLogger(options.LoggerName ?? typeof(TsClient).Namespace ?? "NpgsqlRest.HttpFiles");
}
else
{
_logger = app.Logger;
}
}
else
{
_logger = logger;
}
_builder = builder;
_npgsqlRestoptions = options;
}
public void Cleanup(ref (Routine routine, RoutineEndpoint endpoint)[] endpoints)
{
if (options.FilePath is null)
{
return;
}
if (options.BySchema is false)
{
Run(endpoints, options.FilePath);
}
else
{
if (options.FilePath.Contains("{0}") is false)
{
_logger?.LogError("TsClient Option FilePath doesn't contain {{0}} formatter and BySchema options is true. Some files may be overwritten! Existing...");
return;
}
foreach (var group in endpoints.GroupBy(e => e.routine.Schema))
{
var filename = string.Format(options.FilePath, ConvertToCamelCase(group.Key));
Run(group.ToArray(), filename);
}
}
}
private void Run((Routine routine, RoutineEndpoint endpoint)[] endpoints, string fileName)
{
if (fileName is null)
{
return;
}
Dictionary<string, string> modelsDict = [];
Dictionary<string, int> names = [];
StringBuilder content = new();
StringBuilder interfaces = new();
if (endpoints.Where(e => e.endpoint.RequestParamType == RequestParamType.QueryString).Any())
{
content.AppendLine(string.Format(
"""
const _baseUrl = "{0}";
const _parseQuery = (query: Record<any, any>) => "?" + Object.keys(query)
.map(key => {{
const value = query[key] ? query[key] : "";
if (Array.isArray(value)) {{
return value.map(s => s ? `${{key}}=${{encodeURIComponent(s)}}` : `${{key}}=`).join("&");
}}
return `${{key}}=${{encodeURIComponent(value)}}`;
}})
.join("&");
""", GetHost())
);
}
else
{
content.AppendLine(string.Format(
"""
const _baseUrl = "{0}";
""", GetHost()));
}
foreach (var (routine, endpoint) in endpoints
.Where(e => e.routine.Type == RoutineType.Table || e.routine.Type == RoutineType.View)
.OrderBy(e => e.routine.Schema)
.ThenBy(e => e.routine.Type)
.ThenBy(e => e.routine.Name))
{
Handle(routine, endpoint);
}
foreach (var (routine, endpoint) in endpoints
.Where(e => (e.routine.Type == RoutineType.Table || e.routine.Type == RoutineType.View) is false)
.OrderBy(e => e.routine.Schema)
.ThenBy(e => e.routine.Name))
{
Handle(routine, endpoint);
}
if (!options.FileOverwrite && File.Exists(fileName))
{
return;
}
interfaces.AppendLine(content.ToString());
File.WriteAllText(fileName, interfaces.ToString());
_logger?.LogInformation("Created Typescript file: {0}", fileName);
return;
void Handle(Routine routine, RoutineEndpoint endpoint)
{
var name = string.IsNullOrEmpty(_npgsqlRestoptions?.UrlPathPrefix) ? endpoint.Url : endpoint.Url[_npgsqlRestoptions.UrlPathPrefix.Length..];
var routineType = routine.Type;
var paramCount = routine.ParamCount;
var paramTypeDescriptors = routine.ParamTypeDescriptor;
var isVoid = routine.IsVoid;
var returnsSet = routine.ReturnsSet;
var columnCount = routine.ColumnCount;
var returnsRecordType = routine.ReturnsRecordType;
var columnsTypeDescriptor = routine.ColumnsTypeDescriptor;
var returnsUnnamedSet = routine.ReturnsUnnamedSet;
if (endpoint.Login is true)
{
isVoid = false;
returnsSet = false;
columnCount = 1;
returnsRecordType = false;
columnsTypeDescriptor = [new TypeDescriptor("text")];
}
if (endpoint.Logout is true)
{
isVoid = true;
}
if (routineType == RoutineType.Table || routineType == RoutineType.View)
{
name = string.Concat(name, "-", endpoint.Method.ToString().ToLowerInvariant());
}
if (names.TryGetValue(name, out var count))
{
names[name] = count + 1;
name = string.Concat(name, "-", count);
}
else
{
names.Add(name, 1);
}
var pascal = ConvertToPascalCase(name);
var camel = ConvertToCamelCase(name);
content.AppendLine();
string? requestName = null;
if (paramCount > 0)
{
StringBuilder req = new();
requestName = $"I{pascal}Request";
for (var i = 0; i < paramCount; i++)
{
var descriptor = paramTypeDescriptors[i];
var nameSuffix = descriptor.HasDefault ? "?" : "";
var type = GetTsType(descriptor, true);
req.AppendLine($" {endpoint.ParamNames[i]}{nameSuffix}: {type} | null;");
}
if (modelsDict.TryGetValue(req.ToString(), out var newName))
{
requestName = newName;
}
else
{
modelsDict.Add(req.ToString(), requestName);
req.Insert(0, $"interface {requestName} {{{Environment.NewLine}");
req.AppendLine("}");
req.AppendLine();
interfaces.Append(req);
}
}
string responseName = "void";
bool json = false;
string? returnExp = null;
string GetReturnExp(string responseExp)
{
if (options.IncludeStatusCode)
{
return string.Concat("return {status: response.status, response: ", responseExp, "};");
}
return string.Concat("return ", responseExp, ";");
}
if (isVoid is false)
{
if (returnsSet == false && columnCount == 1 && returnsRecordType is false)
{
var descriptor = columnsTypeDescriptor[0];
responseName = GetTsType(descriptor, true);
if (descriptor.IsArray)
{
json = true;
returnExp = GetReturnExp($"await response.json() as {responseName}[]");
}
else
{
if (descriptor.IsDate || descriptor.IsDateTime)
{
returnExp = GetReturnExp("new Date(await response.text())");
}
else if (descriptor.IsNumeric)
{
returnExp = GetReturnExp("Number(await response.text())");
}
else if (descriptor.IsBoolean)
{
returnExp = GetReturnExp("(await response.text()).toLowerCase() == \"true\"");
}
else
{
returnExp = GetReturnExp("await response.text()");
}
}
}
else
{
json = true;
if (returnsUnnamedSet)
{
responseName = "string[]";
}
else
{
StringBuilder resp = new();
responseName = $"I{pascal}Response";
for (var i = 0; i < columnCount; i++)
{
var descriptor = columnsTypeDescriptor[i];
var type = GetTsType(descriptor, false);
resp.AppendLine($" {endpoint.ColumnNames[i]}: {type} | null;");
}
if (modelsDict.TryGetValue(resp.ToString(), out var newName))
{
responseName = newName;
}
else
{
modelsDict.Add(resp.ToString(), responseName);
resp.Insert(0, $"interface {responseName} {{{Environment.NewLine}");
resp.AppendLine("}");
resp.AppendLine();
interfaces.Append(resp);
}
}
if (returnsSet)
{
responseName = string.Concat(responseName, "[]");
}
returnExp = GetReturnExp($"await response.json() as {responseName}");
}
}
else
{
if (options.IncludeStatusCode)
{
returnExp = "return response.status;";
}
}
string NewLine(string? input, int ident) =>
input is null ? "" : string.Concat(Environment.NewLine, string.Concat(Enumerable.Repeat(" ", ident)), input);
var headers = json ?
@"headers: { ""Content-Type"": ""application/json"" }," : null;
var body = endpoint.RequestParamType == RequestParamType.BodyJson && requestName is not null ?
@"body: JSON.stringify(request)" : null;
var qs = endpoint.RequestParamType == RequestParamType.QueryString && requestName is not null ? " + _parseQuery(request)" : "";
var funcBody = string.Format(
"""
{0}await fetch(_baseUrl + "{1}"{2}, {{
method: "{3}",{4}{5}
}});{6}
""",
isVoid && options.IncludeStatusCode is false ? "" : "const response = ",
endpoint.Url,
qs,
endpoint.Method,
NewLine(headers, 2),
NewLine(body, 2),
NewLine(returnExp, 1));
string resultType;
if (string.Equals(responseName, "void", StringComparison.OrdinalIgnoreCase))
{
resultType = options.IncludeStatusCode ?
"number" :
responseName;
}
else
{
resultType = options.IncludeStatusCode ?
string.Concat("{status: number, response: ", responseName, "}") :
responseName;
}
content.AppendLine(string.Format(
"""
/**
{0}
*/
export async function {1}({2}) : Promise<{3}> {{
{4}
""",
GetComment(routine, endpoint),
camel,
requestName is null ? "" : string.Concat("request: ", requestName),
resultType,
funcBody));
content.AppendLine("}");
} // void Handle
}
private string GetComment(Routine routine, RoutineEndpoint endpoint)
{
StringBuilder sb = new();
if (options.CommentHeader != CommentHeader.None)
{
var comment = options.CommentHeader switch
{
CommentHeader.Simple => routine.SimpleDefinition,
CommentHeader.Full => routine.FullDefinition,
_ => "",
};
foreach (var line in comment.Split('\n', StringSplitOptions.RemoveEmptyEntries))
{
if (line == "\r")
{
continue;
}
sb.AppendLine(string.Concat("* ", line.TrimEnd('\r')));
}
sb.AppendLine("* ");
sb.AppendLine("* @remarks");
sb.AppendLine(string.Format("* {0} {1}", endpoint.Method, endpoint.Url));
}
else
{
sb.AppendLine(string.Format("* {0} {1}", endpoint.Method, endpoint.Url));
}
sb.AppendLine("* ");
sb.Append(string.Format("* @see {0} {1}.{2}", routine.Type.ToString().ToUpperInvariant(), routine.Schema, routine.Name));
return sb.ToString();
}
private static string GetTsType(TypeDescriptor descriptor, bool useDateType)
{
var type = "string";
if (useDateType && (descriptor.IsDate || descriptor.IsDateTime))
{
type = "Date";
}
else if (descriptor.IsNumeric)
{
type = "number";
}
else if (descriptor.IsBoolean)
{
type = "boolean";
}
if (descriptor.IsArray)
{
type = string.Concat(type, "[]");
}
return type;
}
private static readonly char[] separator = ['_', '-', '/', '\\'];
public static string ConvertToPascalCase(string value)
{
return value
.Split(separator, StringSplitOptions.RemoveEmptyEntries)
.Select((s, i) =>
string.Concat(i == 0 ? char.ToUpperInvariant(s[0]) : char.ToUpperInvariant(s[0]), s[1..]))
.Aggregate(string.Empty, string.Concat)
.Trim('"');
}
public static string ConvertToCamelCase(string value)
{
return value
.Split(separator, StringSplitOptions.RemoveEmptyEntries)
.Select((s, i) =>
string.Concat(i == 0 ? char.ToLowerInvariant(s[0]) : char.ToUpperInvariant(s[0]), s[1..]))
.Aggregate(string.Empty, string.Concat)
.Trim('"');
}
private string GetHost()
{
if (options.IncludeHost is false)
{
return "";
}
if (options.CustomHost is not null)
{
return options.CustomHost;
}
string? host = null;
if (_builder is WebApplication app)
{
if (app.Urls.Count != 0)
{
host = app.Urls.FirstOrDefault();
}
else
{
var section = app.Configuration?.GetSection("ASPNETCORE_URLS");
if (section?.Value is not null)
{
host = section.Value.Split(";")?.LastOrDefault();
}
}
}
// default, assumed host
host ??= "http://localhost:5000";
return host;
}
}
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