--- a
+++ b/archives/RadETL/R/DicomRDS.R
@@ -0,0 +1,180 @@
+#################################### DicomRDS Class #############################################
+#' DicomRDS Class
+#'
+#' This class is a class that imports various metadata by reading an RDS file containing DICOM information.
+#' There are basically functions that import data related to Radiology CDM.
+#'
+#' @param data Data frame imported from DICOM RDS file
+#' @seealso https://github.com/OHDSI/Radiology-CDM/wiki
+#' @author Neon K.I.D
+#' @example Examples/DicomRDS_Ex.R
+#' @export
+DicomRDS <- R6::R6Class(classname = "DicomRDS",
+  private = list(
+    # Parameter name is TagName
+    getTagValue = function(name) {
+      tryCatch({
+        res <- self$data$value[which(ifelse(self$data$name %in% name, TRUE, FALSE))]
+        if(is.empty(x = res))
+          res <- NA
+      }, error = function(e) {
+        res <- NA
+        assign("res", res, envir = .GlobalEnv)
+      })
+      return(res)
+    },
+    isValidTag = function(name) if(is.boolean(which(ifelse(self$data$name %in% name, TRUE, FALSE)) == 0)) TRUE else FALSE,
+    getTagLength = function(name) {
+      tryCatch({
+        len <- as.numeric(self$data$length[which(ifelse(self$data$name %in% name, TRUE, FALSE))])
+        if(is.empty(x = len))
+          len <- NA
+      }, error = function(e) {
+        len <- NA
+        assign("len", len, envir = .GlobalEnv)
+      })
+      return(len)
+    }
+  ),
+
+  public = list(
+    data = NULL,
+    idp = NULL,
+    initialize = function(data, idp = 2) {
+      library(stringr)
+      self$data = data
+      self$idp = idp
+    },
+
+    # isContrast for Brain-CT
+    isPost4BrainCT = function() {
+      tryCatch({
+        if(private$isValidTag(name = "ContrastBolusAgent"))
+          return(TRUE)
+        else if(private$isValidTag(name = "PhotometricInterpretation")) {
+          colorVal <- private$getTagValue(name = "PhotometricInterpretation")
+          if(pmatch(x = colorVal, "RGB", nomatch = FALSE) == 1)
+            return(TRUE)
+        }
+        if(private$isValidTag(name = "ContrastBolusRoute"))
+          return(TRUE)
+        else
+          return(FALSE)
+      }, error = function(e) {
+        return(FALSE)
+      })
+    },
+
+    # Creation Radiology ID
+    # createOccurrenceID = function() {
+    #   seriesID <- unlist(strsplit(x = private$getTagValue("SeriesInstanceUID"), split = '[.]'))
+    #   studyID <- unlist(strsplit(x = private$getTagValue("StudyInstanceUID"), split = '[.]'))
+    #
+    #   x <- seriesID[length(seriesID)]
+    #   y <- as.numeric(
+    #     substr(x = studyID[length(studyID)], start = nchar(studyID[length(studyID)]) - 4, stop = nchar(studyID[length(studyID)]))
+    #   )
+    #
+    #   directoryID <- self$getDirectoryID()
+    #   i <- directoryID
+    #   z <- as.numeric(substr(x = directoryID, start = nchar(directoryID) - 2, stop = nchar(directoryID)))
+    #
+    #   # Numbering...
+    #   if(nchar(x) > 7)
+    #     x <- as.numeric(substr(x = x, start = nchar(x) - 5, stop = nchar(x)))
+    #   else
+    #     x <- as.numeric(x)
+    #
+    #   max.val <- i + abs(y - nchar(trunc(x)) - x)
+    #   count <- nchar(trunc(max.val))
+    #
+    #   size <- paste("%0", count, "d", sep = "")
+    #   set.seed(i)
+    #   # lets <- toupper(sample(letters,x, replace = TRUE))
+    #   nums <- sprintf(ifelse(length(size) > 1, size[1], size), sample(1:max.val)[1:nchar(trunc(z))])
+    #   res <- paste(nums, sep = "")
+    #   return(sum(as.numeric(res)))
+    # },
+
+    getStudyDate = function() return(private$getTagValue("StudyDate")),
+    getStudyTime = function() return(private$getTagValue("StudyTime")),
+
+    # Get Image shot dateTime
+    getStudyDateTime = function() {
+      studyDate <- private$getTagValue("StudyDate")
+      studyTime <- private$getTagValue("StudyTime")
+
+      return(getDateTime(studyDate, studyTime))
+    },
+
+    getDuringTime = function(studyDateTime) {
+      tryCatch({
+        if(private$isValidTag("AcquisitionDate")) {
+          acqDate <- private$getTagValue("AcquisitionDate")
+          acqTime <- private$getTagValue("AcquisitionTime")
+          acqDatetime <- getDateTime(acqDate, acqTime)
+          duringTime <- getDiffTime(studyDateTime, acqDatetime)
+          return(duringTime)
+        }
+      }, error = function(e) {
+        return(NA)
+      })
+    },
+
+    getPatientID = function() return(private$getTagValue("PatientID")),
+    getDeviceID = function() return(private$getTagValue("DeviceSerialNumber")),
+    getModality = function() {
+      modal <- private$getTagValue("Modality")
+      if(!is.na(modal) && !is.null(modal)) switch(modal, CT = 10321, MR = 10312, OT = 49585)
+      else NA
+    },
+    getOrientation = function() return(private$getTagValue("PatientOrientation")),
+    getPosition = function() {
+      pos <- private$getTagValue("PatientPosition")
+      if(!is.na(pos) && !is.null(pos)) switch(pos, HFS = 10421, pos)
+      else NA
+    },
+
+    getComment = function() return(private$getTagValue("ImageComments")),
+    getDosageunit = function(modality) if(modality == 10312) return("Tesla") else return("kVp"),
+    getDosage = function(dosageUnit) {
+      sha = private$getTagValue(dosageUnit)
+      if(is.empty(sha)) return(NA) else return(sha)
+    },
+
+    getSourceID = function() return(private$getTagValue("SOPInstanceUID")),
+    getPersonID = function() return(private$getTagValue("PatientID")),
+    getStudyID = function() return(private$getTagValue("StudyID")),
+    getDirectoryID = function() {
+      sp <- strsplit(as.character(self$data$path[length(self$data$path)]), '/')
+      shortPath <- tail(x = unlist(sp), -1)
+      nVec <- unlist(stringr::str_extract_all(string = shortPath[self$idp], pattern = "\\-*\\d+\\.*\\d*"))
+      num <- ifelse(length(nVec) > 1, Reduce(pasteNormal, c(abs(as.numeric(nVec[1])), abs(as.numeric(nVec[2])))), nVec)
+      return(as.numeric(num))
+    },
+    getImageType = function() {
+      exType <- private$getTagValue("ImageType")
+      if(!is.na(exType)) {
+        if(stringr::str_detect(string = exType, pattern = "ORIGINAL"))
+          imType <- "PRIMARY"
+        else if(is.boolean(str_detect(exType, "DERIVED")))
+          imType <- "SECONDARY"
+      } else {
+        imType <- exType
+      }
+      return(imType)
+    },
+
+    getThickness = function() return(private$getTagValue(name = "SliceThickness")),
+    getImgRows = function() return(private$getTagValue(name = "Rows")),
+    getImgCols = function() return(private$getTagValue(name = "Columns")),
+    getWindowCenter = function() return(private$getTagValue(name = "WindowCenter")),
+    getWindowWidth = function() return(private$getTagValue(name = "WindowWidth")),
+
+    isPixelData = function() return(private$getTagLength("PixelData") != -1),
+
+    # free func in C...
+    # finalize method in Java...
+    finalize = function() {}
+  )
+)