1 #TODO: Some methods do the same thing like collecion.index and collection.list.
2 # Make one implementation of the method and make other reference to it.
4 getAPIDocument <- function(){
5 url <- "https://4xphq.arvadosapi.com/discovery/v1/apis/arvados/v1/rest"
6 serverResponse <- httr::RETRY("GET", url = url)
8 httr::content(serverResponse, as = "parsed", type = "application/json")
12 generateAPI <- function()
14 #TODO: Consider passing discovery document URL as parameter
15 #TODO: Consider passing location where to create new files.
16 JSONDocument <- getAPIDocument()
18 generateArvadosClasses(JSONDocument)
19 generateArvadosAPIClass(JSONDocument)
22 generateArvadosAPIClass <- function(discoveryDocument)
24 classMetaData <- discoveryDocument$schemas
25 functionResources <- discoveryDocument$resources
26 resourceNames <- names(functionResources)
28 doc <- generateMethodsDocumentation(functionResources, resourceNames)
29 arvadosAPIHeader <- generateAPIClassHeader()
30 arvadosClassMethods <- generateClassContent(functionResources,
31 resourceNames, classMetaData)
32 arvadosAPIFooter <- generateAPIClassFooter()
34 arvadosClass <- c(doc, arvadosAPIHeader, arvadosClassMethods, arvadosAPIFooter)
36 #TODO: Save to a file or load in memory?
37 fileConn <- file("./R/Arvados.R", "w")
38 writeLines(unlist(arvadosClass), fileConn)
43 generateClassContent <- function(functionResources, resourceNames, classMetaData)
46 arvadosMethods <- Map(function(resource, resourceName)
48 methodNames <- names(resource$methods)
50 functions <- Map(function(methodMetaData, methodName)
52 methodName <- paste0(resourceName, ".", methodName)
53 createFunction(methodName, methodMetaData, classMetaData)
55 }, resource$methods, methodNames)
57 unlist(unname(functions))
59 }, functionResources, resourceNames)
64 generateMethodsDocumentation <- function(functionResources, resourceNames)
66 arvadosMethods <- unlist(unname(Map(function(resource, resourceName)
68 methodNames <- names(resource$methods)
70 functions <- Map(function(methodMetaData, methodName)
72 methodName <- paste0(resourceName, ".", methodName)
73 getMethodDocumentation(methodName, methodMetaData)
75 }, resource$methods, methodNames)
77 unlist(unname(functions))
79 }, functionResources, resourceNames)))
84 getMethodDocumentation <- function(methodName, methodMetaData)
86 name <- paste("#' @name", methodName)
87 usage <- getMethodUsage(methodName, methodMetaData)
88 description <- paste("#'", methodName, "is a method defined in Arvados class.")
89 params <- getMethodDescription(methodMetaData)
90 returnValue <- paste("#' @return", methodMetaData$response[["$ref"]], "object.")
102 getMethodUsage <- function(methodName, methodMetaData)
104 args <- getFunctionArguments(methodMetaData)
105 c(formatArgs(paste0("#' @usage arv$", methodName, "("), "#' \t", args, ")", 40))
108 getMethodDescription <- function(methodMetaData)
110 request <- methodMetaData$request
113 if(!is.null(request))
115 requestDoc <- unname(unlist(sapply(request$properties, function(prop)
117 className <- sapply(prop, function(ref) ref)
118 objectName <- paste0(tolower(substr(className, 1, 1)),
119 substr(className, 2, nchar(className)))
120 paste("#' @param", objectName, className, "object.")
124 argNames <- names(methodMetaData$parameters)
126 argsDoc <- unname(unlist(sapply(argNames, function(argName)
128 arg <- methodMetaData$parameters[[argName]]
129 argDescription <- arg$description
130 paste("#' @param", argName, argDescription)
133 c(requestDoc, argsDoc)
136 getFunctionName <- function(functionMetaData)
138 stringr::str_replace(functionMetaData$id, "arvados.", "")
141 #TODO: Make sure that arguments that are required always go first.
142 # This is not the case if request$required is false.
143 getFunctionArguments <- function(functionMetaData)
145 request <- functionMetaData$request
148 if(!is.null(request))
151 requestArgs <- names(request$properties)
153 requestArgs <- paste(names(request$properties), "=", "NULL")
156 argNames <- names(functionMetaData$parameters)
158 args <- sapply(argNames, function(argName)
160 arg <- functionMetaData$parameters[[argName]]
164 if(!is.null(arg$default))
165 return(paste0(argName, " = ", "\"", arg$default, "\""))
167 return(paste(argName, "=", "NULL"))
176 getFunctionBody <- function(functionMetaData, classMetaData)
178 url <- getRequestURL(functionMetaData)
179 headers <- getRequestHeaders()
180 requestQueryList <- getRequestQueryList(functionMetaData)
181 requestBody <- getRequestBody(functionMetaData)
182 request <- getRequest(functionMetaData)
183 response <- getResponse(functionMetaData)
184 errorCheck <- getErrorCheckingCode()
185 returnObject <- getReturnObject(functionMetaData, classMetaData)
191 request, response, "",
195 paste0("\t\t\t", body)
198 getErrorCheckingCode <- function()
200 c("if(!is.null(resource$errors))", "\tstop(resource$errors)")
203 getRequestBody <- function(functionMetaData)
205 request <- functionMetaData$request
207 if(is.null(request) || !request$required)
208 return("body <- NULL")
210 requestParameterName <- names(request$properties)[1]
211 paste0("body <- ", requestParameterName, "$toJSON()")
214 getRequestHeaders <- function()
216 c("headers <- list(Authorization = paste(\"OAuth2\", private$token), ",
217 " \"Content-Type\" = \"application/json\")")
220 getReturnObject <- function(functionMetaData, classMetaData)
222 returnClass <- functionMetaData$response[["$ref"]]
223 classArguments <- getReturnClassArguments(returnClass, classMetaData)
226 if(returnClass == "Collection")
227 return(c(formatArgs("collection <- Collection$new(", "\t",
228 classArguments, ")", 40),
230 "collection$setRESTService(private$REST)",
233 formatArgs(paste0(returnClass, "$new("), "\t", classArguments, ")", 40)
236 getReturnClassArguments <- function(className, classMetaData)
238 classArguments <- unique(names(classMetaData[[className]]$properties))
240 arguments <- sapply(classArguments, function(arg)
242 paste0(arg, " = resource$", arg)
248 getRequest <- function(functionMetaData)
250 method <- functionMetaData$httpMethod
251 c(paste0("response <- private$REST$http$exec(\"", method, "\", url, headers, body,"),
252 " queryArgs, private$numRetries)")
255 getResponse <- function(functionMetaData)
257 "resource <- private$REST$httpParser$parseJSONResponse(response)"
260 getRequestURL <- function(functionMetaData)
262 endPoint <- functionMetaData$path
263 endPoint <- stringr::str_replace_all(endPoint, "\\{", "${")
264 url <- c(paste0("endPoint <- stringr::str_interp(\"", endPoint, "\")"),
265 paste0("url <- paste0(private$host, endPoint)"))
269 getRequestQueryList <- function(functionMetaData)
271 args <- names(functionMetaData$parameters)
273 if(length(args) == 0)
274 return("queryArgs <- NULL")
276 args <- sapply(args, function(arg) paste0(arg, " = ", arg))
277 collapsedArgs <- paste0(args, collapse = ", ")
279 if(nchar(collapsedArgs) > 40)
280 return(formatArgs("queryArgs <- list(", "\t", args, ")", 40))
282 return(paste0("queryArgs <- list(", collapsedArgs, ")"))
285 createFunction <- function(functionName, functionMetaData, classMetaData)
287 args <- getFunctionArguments(functionMetaData)
288 body <- getFunctionBody(functionMetaData, classMetaData)
289 funSignature <- getFunSignature(functionName, args)
297 getFunSignature <- function(funName, args)
299 collapsedArgs <- paste0(args, collapse = ", ")
301 if(nchar(collapsedArgs) > 40)
303 return(paste0("\t\t",
304 formatArgs(paste(funName, "= function("),
305 "\t", args, ")", 40)))
309 return(paste0("\t\t", funName, " = function(", collapsedArgs, ")"))
313 generateAPIClassHeader <- function()
316 "Arvados <- R6::R6Class(",
322 "\t\tinitialize = function(authToken = NULL, hostName = NULL, numRetries = 0)",
324 "\t\t\tif(!is.null(hostName))",
325 "\t\t\t\tSys.setenv(ARVADOS_API_HOST = hostName)",
327 "\t\t\tif(!is.null(authToken))",
328 "\t\t\t\tSys.setenv(ARVADOS_API_TOKEN = authToken)",
330 "\t\t\thostName <- Sys.getenv(\"ARVADOS_API_HOST\")",
331 "\t\t\ttoken <- Sys.getenv(\"ARVADOS_API_TOKEN\")",
333 "\t\t\tif(hostName == \"\" | token == \"\")",
334 "\t\t\t\tstop(paste(\"Please provide host name and authentification token\",",
335 "\t\t\t\t\t\t \"or set ARVADOS_API_HOST and ARVADOS_API_TOKEN\",",
336 "\t\t\t\t\t\t \"environment variables.\"))",
338 "\t\t\tprivate$token <- token",
339 "\t\t\tprivate$host <- paste0(\"https://\", hostName, \"/arvados/v1/\")",
340 "\t\t\tprivate$numRetries <- numRetries",
341 "\t\t\tprivate$REST <- RESTService$new(token, hostName,",
342 "\t\t\t HttpRequest$new(), HttpParser$new(),",
343 "\t\t\t numRetries)",
348 generateAPIClassFooter <- function()
350 c("\t\tgetHostName = function() private$host,",
351 "\t\tgetToken = function() private$token,",
352 "\t\tsetRESTService = function(newREST) private$REST <- newREST",
360 "\t\tnumRetries = NULL",
363 "\tcloneable = FALSE",
367 generateArvadosClasses <- function(resources)
369 classes <- sapply(resources$schemas, function(classSchema)
371 #NOTE: Collection is implemented manually.
372 if(classSchema$id != "Collection")
373 getArvadosClass(classSchema)
377 unlist(unname(classes))
379 fileConn <- file("./R/ArvadosClasses.R", "w")
380 writeLines(unlist(classes), fileConn)
385 getArvadosClass <- function(classSchema)
387 name <- classSchema$id
388 fields <- unique(names(classSchema$properties))
389 constructorArgs <- paste(fields, "= NULL")
390 documentation <- getClassDocumentation(classSchema, constructorArgs)
392 classString <- c(documentation,
393 paste0(name, " <- R6::R6Class("),
395 paste0("\t\"", name, "\","),
398 paste0("\t\t", fields, " = NULL,"),
400 paste0("\t\t", formatArgs("initialize = function(", "\t\t",
401 constructorArgs, ")", 40)),
403 paste0("\t\t\tself$", fields, " <- ", fields),
405 paste0("\t\t\t", formatArgs("private$classFields <- c(", "\t",
409 "\t\ttoJSON = function() {",
410 "\t\t\tfields <- sapply(private$classFields, function(field)",
412 "\t\t\t\tself[[field]]",
413 "\t\t\t}, USE.NAMES = TRUE)",
415 paste0("\t\t\tjsonlite::toJSON(list(\"", tolower(name), "\" =
416 Filter(Negate(is.null), fields)), auto_unbox = TRUE)"),
421 "\t\tclassFields = NULL",
424 "\tcloneable = FALSE",
429 getClassDocumentation <- function(classSchema, constructorArgs)
431 name <- classSchema$id
432 description <- classSchema$description
433 nameLowercaseFirstLetter <- paste0(tolower(substr(name, 1, 1)),
434 substr(name, 2, nchar(name)))
435 c(paste0("#' ", name),
437 paste0("#' ", description),
439 "#' @section Usage:",
440 formatArgs(paste0("#' \\preformatted{",
441 nameLowercaseFirstLetter, " -> ", name, "$new("),
442 "#' \t", constructorArgs, ")", 50),
446 paste0("#' @section Arguments:"),
448 paste0("#' ", getClassArgumentDescription(classSchema)),
451 paste0("#' @name ", name),
457 getClassArgumentDescription <- function(classSchema)
459 argDoc <- sapply(classSchema$properties, function(arg)
461 paste0("{", arg$description, "}")
464 paste0("\\item{", names(classSchema$properties), "}", argDoc)
467 formatArgs <- function(prependAtStart, prependToEachSplit,
468 args, appendAtEnd, lineLength)
472 args[1:(length(args) - 1)] <- paste0(args[1:(length(args) - 1)], ",")
475 args[1] <- paste0(prependAtStart, args[1])
476 args[length(args)] <- paste0(args[length(args)], appendAtEnd)
478 argsLength <- length(args)
482 while(index <= argsLength)
487 while(nchar(line) < lineLength && index <= argsLength)
489 line <- paste(line, args[index])
493 argLines <- c(argLines, line)
496 argLines <- unlist(argLines)
497 argLinesLen <- length(argLines)
500 argLines[2:argLinesLen] <- paste0(prependToEachSplit, argLines[2:argLinesLen])