1 getAPIDocument <- function(){
2 url <- "https://4xphq.arvadosapi.com/discovery/v1/apis/arvados/v1/rest"
3 serverResponse <- httr::RETRY("GET", url = url)
5 httr::content(serverResponse, as = "parsed", type = "application/json")
9 generateAPI <- function()
11 #TODO: Consider passing discovery document URL as parameter.
12 #TODO: Consider passing location where to create new files.
13 discoveryDocument <- getAPIDocument()
15 methodResources <- discoveryDocument$resources
16 resourceNames <- names(methodResources)
18 doc <- generateMethodsDocumentation(methodResources, resourceNames)
19 arvadosAPIHeader <- generateAPIClassHeader()
20 arvadosProjectMethods <- generateProjectMethods()
21 arvadosClassMethods <- generateClassContent(methodResources, resourceNames)
22 arvadosAPIFooter <- generateAPIClassFooter()
24 arvadosClass <- c(doc,
26 arvadosProjectMethods,
30 fileConn <- file("./R/Arvados.R", "w")
31 writeLines(unlist(arvadosClass), fileConn)
36 generateAPIClassHeader <- function()
39 "Arvados <- R6::R6Class(",
45 "\t\tinitialize = function(authToken = NULL, hostName = NULL, numRetries = 0)",
47 "\t\t\tif(!is.null(hostName))",
48 "\t\t\t\tSys.setenv(ARVADOS_API_HOST = hostName)",
50 "\t\t\tif(!is.null(authToken))",
51 "\t\t\t\tSys.setenv(ARVADOS_API_TOKEN = authToken)",
53 "\t\t\thostName <- Sys.getenv(\"ARVADOS_API_HOST\")",
54 "\t\t\ttoken <- Sys.getenv(\"ARVADOS_API_TOKEN\")",
56 "\t\t\tif(hostName == \"\" | token == \"\")",
57 "\t\t\t\tstop(paste(\"Please provide host name and authentification token\",",
58 "\t\t\t\t\t\t \"or set ARVADOS_API_HOST and ARVADOS_API_TOKEN\",",
59 "\t\t\t\t\t\t \"environment variables.\"))",
61 "\t\t\tprivate$token <- token",
62 "\t\t\tprivate$host <- paste0(\"https://\", hostName, \"/arvados/v1/\")",
63 "\t\t\tprivate$numRetries <- numRetries",
64 "\t\t\tprivate$REST <- RESTService$new(token, hostName,",
65 "\t\t\t HttpRequest$new(), HttpParser$new(),",
71 generateProjectMethods <- function()
73 c("\t\tproject.get = function(uuid)",
75 "\t\t\tself$groups.get(uuid)",
78 "\t\tproject.create = function(group, ensure_unique_name = \"false\")",
80 "\t\t\tgroup <- c(\"group_class\" = \"project\", group)",
81 "\t\t\tself$groups.create(group, ensure_unique_name)",
84 "\t\tproject.update = function(group, uuid)",
86 "\t\t\tgroup <- c(\"group_class\" = \"project\", group)",
87 "\t\t\tself$groups.update(group, uuid)",
90 "\t\tproject.list = function(filters = NULL, where = NULL,",
91 "\t\t\torder = NULL, select = NULL, distinct = NULL,",
92 "\t\t\tlimit = \"100\", offset = \"0\", count = \"exact\",",
93 "\t\t\tinclude_trash = NULL)",
95 "\t\t\tfilters[[length(filters) + 1]] <- list(\"group_class\", \"=\", \"project\")",
96 "\t\t\tself$groups.list(filters, where, order, select, distinct,",
97 "\t\t\t limit, offset, count, include_trash)",
100 "\t\tproject.delete = function(uuid)",
102 "\t\t\tself$groups.delete(uuid)",
107 generateClassContent <- function(methodResources, resourceNames)
109 arvadosMethods <- Map(function(resource, resourceName)
111 methodNames <- names(resource$methods)
113 functions <- Map(function(methodMetaData, methodName)
115 methodName <- paste0(resourceName, ".", methodName)
116 createMethod(methodName, methodMetaData)
118 }, resource$methods, methodNames)
120 unlist(unname(functions))
122 }, methodResources, resourceNames)
127 generateAPIClassFooter <- function()
129 c("\t\tgetHostName = function() private$host,",
130 "\t\tgetToken = function() private$token,",
131 "\t\tsetRESTService = function(newREST) private$REST <- newREST,",
132 "\t\tgetRESTService = function() private$REST",
140 "\t\tnumRetries = NULL",
143 "\tcloneable = FALSE",
147 createMethod <- function(name, methodMetaData)
149 args <- getMethodArguments(methodMetaData)
150 signature <- getMethodSignature(name, args)
151 body <- getMethodBody(methodMetaData)
159 getMethodArguments <- function(methodMetaData)
161 request <- methodMetaData$request
164 if(!is.null(request))
166 resourceName <- tolower(request$properties[[1]][[1]])
169 requestArgs <- resourceName
171 requestArgs <- paste(resourceName, "=", "NULL")
174 argNames <- names(methodMetaData$parameters)
176 args <- sapply(argNames, function(argName)
178 arg <- methodMetaData$parameters[[argName]]
182 if(!is.null(arg$default))
183 return(paste0(argName, " = ", "\"", arg$default, "\""))
185 return(paste(argName, "=", "NULL"))
194 getMethodSignature <- function(methodName, args)
196 collapsedArgs <- paste0(args, collapse = ", ")
197 lineLengthLimit <- 40
199 if(nchar(collapsedArgs) > lineLengthLimit)
201 return(paste0("\t\t",
202 formatArgs(paste(methodName, "= function("),
203 "\t", args, ")", lineLengthLimit)))
207 return(paste0("\t\t", methodName, " = function(", collapsedArgs, ")"))
211 getMethodBody <- function(methodMetaData)
213 url <- getRequestURL(methodMetaData)
214 headers <- getRequestHeaders()
215 requestQueryList <- getRequestQueryList(methodMetaData)
216 requestBody <- getRequestBody(methodMetaData)
217 request <- getRequest(methodMetaData)
218 response <- getResponse(methodMetaData)
219 errorCheck <- getErrorCheckingCode()
220 returnStatement <- getReturnObject()
224 requestQueryList, "",
226 request, response, "",
230 paste0("\t\t\t", body)
233 getRequestURL <- function(methodMetaData)
235 endPoint <- methodMetaData$path
236 endPoint <- stringr::str_replace_all(endPoint, "\\{", "${")
237 url <- c(paste0("endPoint <- stringr::str_interp(\"", endPoint, "\")"),
238 paste0("url <- paste0(private$host, endPoint)"))
242 getRequestHeaders <- function()
244 c("headers <- list(Authorization = paste(\"OAuth2\", private$token), ",
245 " \"Content-Type\" = \"application/json\")")
248 getRequestQueryList <- function(methodMetaData)
250 queryArgs <- names(Filter(function(arg) arg$location == "query",
251 methodMetaData$parameters))
253 if(length(queryArgs) == 0)
254 return("queryArgs <- NULL")
256 queryArgs <- sapply(queryArgs, function(arg) paste0(arg, " = ", arg))
257 collapsedArgs <- paste0(queryArgs, collapse = ", ")
259 lineLengthLimit <- 40
261 if(nchar(collapsedArgs) > lineLengthLimit)
262 return(formatArgs("queryArgs <- list(", "\t\t\t\t ", queryArgs, ")",
265 return(paste0("queryArgs <- list(", collapsedArgs, ")"))
268 getRequestBody <- function(methodMetaData)
270 request <- methodMetaData$request
272 if(is.null(request) || !request$required)
273 return("body <- NULL")
275 resourceName <- tolower(request$properties[[1]][[1]])
277 requestParameterName <- names(request$properties)[1]
279 c(paste0("if(length(", resourceName, ") > 0)"),
280 paste0("\tbody <- jsonlite::toJSON(list(", resourceName, " = ", resourceName, "), "),
281 "\t auto_unbox = TRUE)",
286 getRequest <- function(methodMetaData)
288 method <- methodMetaData$httpMethod
289 c(paste0("response <- private$REST$http$exec(\"", method, "\", url, headers, body,"),
290 " queryArgs, private$numRetries)")
293 getResponse <- function(methodMetaData)
295 "resource <- private$REST$httpParser$parseJSONResponse(response)"
298 getErrorCheckingCode <- function()
300 c("if(!is.null(resource$errors))",
301 "\tstop(resource$errors)")
304 getReturnObject <- function()
309 #NOTE: Arvados class documentation:
311 generateMethodsDocumentation <- function(methodResources, resourceNames)
313 methodsDoc <- unlist(unname(Map(function(resource, resourceName)
315 methodNames <- names(resource$methods)
317 methodDoc <- Map(function(methodMetaData, methodName)
319 methodName <- paste0(resourceName, ".", methodName)
320 getMethodDocumentation(methodName, methodMetaData)
322 }, resource$methods, methodNames)
324 unlist(unname(methodDoc))
326 }, methodResources, resourceNames)))
331 getMethodDocumentation <- function(methodName, methodMetaData)
333 name <- paste("#' @name", methodName)
334 usage <- getMethodUsage(methodName, methodMetaData)
335 description <- paste("#'", methodName, "is a method defined in Arvados class.")
336 params <- getMethodDescription(methodMetaData)
337 returnValue <- paste("#' @return", methodMetaData$response[["$ref"]], "object.")
349 getMethodUsage <- function(methodName, methodMetaData)
351 lineLengthLimit <- 40
352 args <- getMethodArguments(methodMetaData)
353 c(formatArgs(paste0("#' @usage arv$", methodName,
354 "("), "#' \t", args, ")", lineLengthLimit))
357 getMethodDescription <- function(methodMetaData)
359 request <- methodMetaData$request
362 if(!is.null(request))
364 requestDoc <- unname(unlist(sapply(request$properties, function(prop)
366 className <- sapply(prop, function(ref) ref)
367 objectName <- paste0(tolower(substr(className, 1, 1)),
368 substr(className, 2, nchar(className)))
369 paste("#' @param", objectName, className, "object.")
373 argNames <- names(methodMetaData$parameters)
375 argsDoc <- unname(unlist(sapply(argNames, function(argName)
377 arg <- methodMetaData$parameters[[argName]]
378 argDescription <- arg$description
379 paste("#' @param", argName, argDescription)
382 c(requestDoc, argsDoc)
385 #NOTE: Utility functions:
387 # This function is used to split very long lines of code into smaller chunks.
388 # This is usually the case when we pass a lot of named argumets to a function.
389 formatArgs <- function(prependAtStart, prependToEachSplit,
390 args, appendAtEnd, lineLength)
394 args[1:(length(args) - 1)] <- paste0(args[1:(length(args) - 1)], ",")
397 args[1] <- paste0(prependAtStart, args[1])
398 args[length(args)] <- paste0(args[length(args)], appendAtEnd)
400 argsLength <- length(args)
404 while(index <= argsLength)
409 while(nchar(line) < lineLength && index <= argsLength)
411 line <- paste(line, args[index])
415 argLines <- c(argLines, line)
418 argLines <- unlist(argLines)
419 argLinesLen <- length(argLines)
422 argLines[2:argLinesLen] <- paste0(prependToEachSplit, argLines[2:argLinesLen])