##########################################################################################################

# THREADNET Misc functions

# This software may be used according to the terms provided in the

# GNU General Public License (GPL-3.0) https://opensource.org/licenses/GPL-3.0?

# Absolutely no warranty!

##########################################################################################################

# Read in, check, and clean up the data

# need to see "tStamp" in the first column

#' read_occurrences

#'

#' @family ThreadNet_Misc

#'

#' @param inFile

#'

#' @return dataframe with occurrences

#' @export

#'

#' @examples

read_occurrences <- function(inFile){

# if it's null return null, otherwise do the whole thing...

if (is.null(inFile))

return(NULL)

# read in the table of occurrences

o=read.csv(inFile$datapath)

# check the file format. Put in humorous example if the format is bad

if (check_file_format(o)=="badformat")

{o=make_example_DF() }

else if (check_file_format(o)=="sequence")

{o=add_relative_timestamps(o,"sequence", 1) }

# clean up the data -- remove blanks, etc.

o = cleanOcc(o,cfnames(o))

return(o)}

# This could be improved but is an important logical checkpoint

# just checks that a required field is in the first column

check_file_format = function(o){

if ((colnames(o)[1] == "tStamp"))

{return("tStamp")}

else if ((colnames(o)[1] == "sequence"))

{return("sequence")}

else

{return("badformat")}

}

#' Add relative timestamps

#'

#' This function uses the sequence numbers to add a column with time stamp to the data, so that it can be used throughout the rest

#' of the app, which expects to see a time stamp. Start time for all threads is the same: "2017-01-01 00:00:00" Happy New Year!

#'

#' @param o data frame of occurrences

#' @param SN column containing the sequence numbers

#' @param tstep time step for events within each thread. Default is one minute.

#'

#' @return data frame of occurrences

#' @export

#'

#' @examples

add_relative_timestamps <- function(o, SN, tstep=1){

startTime <- as.POSIXct("2017-01-01 00:00:00")

# add the column at the beginning

o <- cbind(startTime + 60*as.numeric(as.character(o[[SN]])), o)

# set the column name

colnames(o)[1] <- "tStamp"

return(o)

}

## Make an example data frame for display...

make_example_DF = function(){

correct_occ = read.table(text="tStamp actor action object location

'2017-4-7 17:52:04' jimmy tosses ball playground

'2017-4-7 17:52:12' rover fetches ball playground

'2017-5-18 9:05:52' jimmy tosses ball forest

'2017-5-18 9:06:24' rover fetches stick forest

'2017-5-18 9:10:48' jimmy searches ball forest ", header=TRUE)

}

# this function will clean up the raw occurrence data

#' Clean up occurrences

#'

#' Clean up removes blanks from the data. Blanks cause problems because the n-gram algorithm interprets blanks as seperate tokens.

#'

#' @family ThreadNet_Misc

#' @param o data frame with occurrences

#' @param cfnames names of contextual factors (columns) to clean up.

#'

#' @return data frame with blanks removed.

#' @export

#'

#' @examples

cleanOcc = function(o, cfnames){

## clean up the spaces here and make it back into a factor

for (cf in cfnames){

o[,cf] = sapply(o[,cf],fixBlanks)

o[cf] = factor( o[,cf] )

}

# force tStamp into a "YMD_HMS" format

o$tStamp = as.character(o$tStamp)

o$tStamp = parse_date_time(o$tStamp, c("dmy HMS", "dmY HMS", "ymd HMS"))

## Add the category ">other<" for all of the factors to facilitate recoding later

# This may not be needed anymore... commented out Dec 3 2017

# o <- as.data.frame(lapply(o, addOther))

# add weekday and month

o$weekday = as.factor(weekdays(as.Date(o$tStamp)))

o$month = as.factor(months(as.Date(o$tStamp)))

return(o)

}

## Use this function to remove blanks from the CF data

fixBlanks = function(s){

# take out blanks

s=str_replace_all(s," ","_")

if (is.na(s)){

s="blank"

}

return(s)

}

# NO LONGER NEEDED 12/2017 add the >other< categeory

# addOther <- function(x){

# if(is.factor(x))

# return(factor(x, levels=c(levels(x), ">other<")))

# return(x) }

#' numThreads counts how many threads in the data set

#'

#' Threads must have unique thred numbers for this function to work

#'

#' @family ThreadNet_Misc

#' @param o data frame with occurrences or events

#' @param TN column with thread number

#'

#' @return number of threads

#' @export

numThreads = function(o,TN) {length(unique(o[[TN]]))}

# Time range for the data set (not really needed but nice)

timeRange= function(o){

# get the min/max time in the whole set of occurrences

start = min(as.POSIXlt.date(o$tStamp))

finish = max(as.POSIXlt.date(o$tStamp))

# take the difference

difftime(finish,start)}

# Put it into a nice phrase

timeRangePhrase = function(tr){

rangeunits = attr(tr,"units")

paste(floor(as.numeric(tr)),rangeunits,"from start to finish.")}

# this function is used to split up the threads into n ~equal buckets

make_subsets <- function(d,n){

return(split(d, ceiling(seq_along(d)/(length(d)/n))))

}

# This function takes a slider value and returns a valid column name for zooming

# if the argument is null, then use ZM_1

zoomColumn <- function(z){

# print(paste("In zoomColumn z=",z))

if (is.null(z))

{r="ZM_1"}

else

{r=paste0("ZM_",z)}

# print(paste("In zoomColumn r=",r))

return(r)

}

######### Functions that return column names #######

# names of the columns for contextual factors

# grab all of the columns except the first, which has the time stamp

# tStamp in the first column

#' cfnames provides names of all the contextual factors (except the time stamp)

#' @family ThreadNet_Misc

#' @param o data frame with threads

#'

#' @return list of column names

#' @export

#'

cfnames <- function(o){

colnames(o)[2:length(colnames(o))]}

## this is used to populate the UI for comparison of categories within a CF

#' get_CF_levels returns the levels of a contextual factor

#' @family ThreadNet_Misc

#' @param o data frame with threads

#' @param cf a contextual factors (column)

#'

#' @return list of unique factor levels

#' @export

get_CF_levels <- function(o,cf){

return(levels(o[,cf]))

}

##########################################################################################################

# this function adds a new column to the occurrenes table based on a combination of context factors CF)

#' Creates a new column that combines some set of other columns

#'

#' For example, actor+action

#'

#' @family ThreadNet_Misc

#' @param o data frame with threads

#' @param CF contextual factors to be combined.

#' @param newCol name of the new combined conextual factor

#'

#' @return data frame with the new column

#' @export

#'

#' @examples

combineContextFactors <- function(o,CF,newCol){

# Use the old column if there is one

if (!(newCol %in% names(o))) {

# Need to get the CF parameters into the right format for tidyr::unite function

cfn= sapply(CF, as.character)

newCol = as.character(newCol)

# unite the columns, but keep the old ones

o= unite_(o, newCol, cfn, sep="+", remove=FALSE)

}

# Coerce the new column into a factor

o[newCol] = as.factor(o[,newCol])

return(o)

}

# just keep this simple

newColName <- function(CF_list){

return(paste0(CF_list,collapse="_")) }

# These were used on the occ-to-event tab to configure the slider

threshold_slider_min <- function(o){

return(floor(min(o$timeGap)))

}

threshold_slider_max <- function(o){

return(ceiling(max(o$timeGap)))

}

threshold_slider_selected <- function(o){

return(min(o$timeGap))

}

#### count the handoffs, but reverse coded -- zero = all different

diff_handoffs <- function(o){

# initialize the previous row

previous_row <<- o[1,]

return(apply(o,1, row_diff_handoff))

}

row_diff_handoff <- function(this_row){

# just add up the differences.

d <-sum(this_row==previous_row)

# store the previous row

previous_row <<-this_row

# return the number ofdifferences

return(d)

}

#### Time gaps -- just pass in the column of time stamps

diff_tStamp <- function(ts){

# initialize the first row

previous_row <<- ts[1]

return(sapply(ts, row_diff_tStamp))

}

row_diff_tStamp <- function(this_row){

# print(paste("this_row",this_row))

# print(paste("previous_row",previous_row))

# just add up the differences.

d <-max(0,difftime(this_row, previous_row, units="secs"))

# store the previous row

previous_row <<-this_row

# return the time difference

return(d)

}

#' threadSizeTable provides a distribution of the length of threads

#'

#' This function should work on either ocurrences or events.

#' it returns length and duration of each thread.It requires tStamp field to compute duration.

#'

#' @family ThreadNet_Misc

#'

#' @param o data frame with threads

#' @param TN column comtaining the threadNumber

#'

#' @return data frame with table of thread lengths

#' @export

threadSizeTable <- function(o,TN){

# get the number of threads

nThreads = nrow(unique(o[TN]))

id=integer(nThreads)

num=integer(nThreads)

dur=numeric(nThreads)

sizes = data.frame(id,

num,

dur)

for (i in 1:nThreads){

sizes$id = i

sizes$num[i] = sum(o[TN]==i)

}

s = as.data.frame(table(sizes$num))

return(s)

}

#########################################################

#' convert_TN_to_TramineR

#'

#' converts the csv format used in ThreadNet to the format used by TraMiner. Should provide a way to save this, as well.

#'

#' @family ThreadNet_Misc

#' @param df threads (occurrences or events)

#' @param TN Column with threadNumber

#' @param CF Contextual factor that will be used to define the state sequences in TraMineR

#'

#' @return Dataframe in TraMineR format (state sequeces in horizontal rows)

#' @export

#'

#' @examples

convert_TN_to_TramineR <- function(df, TN, CF){

# dataframe must be sorted by time or sequence within each threadNumber

# TN is the threadnumber

# CF is some attribute we will use in TramineR

# first find the threads

threads = unique(df[,TN])

nThreads = length(threads)

# Initialize list of empty lists

s = rep( list(list()), nThreads )

for ( th in 1:nThreads){

#subset of df that contains the sequence

s[[th]] = as.character(df[df[[TN]]==threads[th],CF])

}

# add NA to make all the lists the same length

s = lapply(s, `length<-`, max(lengths(s)))

# convert to data frame

df <- data.frame(matrix(unlist(s), nrow=nThreads, byrow=T))

# add a column for the threadnumber

# df[TN] = threads

return(df)

}

# these functions suppose the moving window

#' get_threadList returns a list of all thread numbers

#'

#' @family ThreadNet_Misc

#'

#' @param e data frame with threaded events

#' @param TN Column with threadNumber

#' @param SN Column with sequence numbers

#'

#' @return list of thread numbers

#' @export

get_threadList <- function(e,TN,SN){

# for the current data structure for events, you just pick all of the threads where seqNum == 1

return(e[e[[SN]]==1,TN])

}

#' get_moving_window returns a set of threads for a moving window

#'

#' @family ThreadNet_Misc

#'

#' @param e data frame with threads (needs to have threadNum and seqNum)

#' @param s size of window

#' @param l location of window

#'

#' @return data from with just the threads in the window

#' @export

#'

get_moving_window <- function(e, s, l ){

# get the list of threads

w=get_threadList(e,"threadNum","seqNum")

# get get the appropriate subset of threads for the window

w=w[l:(l+s-1)]

# and now subset the rows for those threads

return(e[e$threadNum %in% w,])

}

#####################################################

# GlobalEventMappings is a global variable

get_event_mapping_name_list <- function(){

# print(paste('length of gem:',length(GlobalEventMappings)))

n= unlist(lapply(1:length(GlobalEventMappings),function(i){

unlist(GlobalEventMappings[[i]][["name"]]) }))

# print(n)

return(n)

}

store_event_mapping <- function(EventMapName, e){

# Add the mapping to the global list of mappings. Sort by threadNum and seqNum

em = list(name = paste(EventMapName), threads = e[order(e[['threadNum']],e[['seqNum']]),])

GlobalEventMappings <<- append(list(em), GlobalEventMappings )

return(em)

}

get_event_mapping_threads <- function( mapname){

# get the index for the mapname

# print (paste0('mapname',mapname))

idx=which(mapname==get_event_mapping_name_list() )

# print(idx)

if (idx==0) {

print('mapname not found for threads')

return(NULL)

}

else

return(GlobalEventMappings[[idx]][["threads"]])

}

delete_event_mapping <- function( mapname){

# get the index for the mapname

idx=which(mapname==get_event_mapping_name_list() )

GlobalEventMappings[[idx]] <-NULL

# GlobalEventMappings[[idx]][["threads"]] <-NULL

# GlobalEventMappings[[idx]][["cluster"]] <-NULL

print(paste('deleting', mapname, idx))

save(GlobalEventMappings, file="eventMappings_after_delete.RData")

}

export_event_mapping <- function(mapname){

nicename = paste0("EventMap_",mapname)

assign(nicename, get_event_mapping_threads(mapname))

save(list=nicename, file = paste0(nicename,".Rdata"))

print(paste(" EventMapping saved in file: ", paste0(nicename,".Rdata")))

}

export_event_mapping_csv <- function( mapname){

output = as.data.frame(get_event_mapping_threads(mapname))

output[grep('V_',colnames(output))]<-NULL

write.csv(output, file=file.choose(), quote = TRUE, row.names = FALSE)

print(" EventMapping saved as .csv file")

}

# Make a nice dataframe to display

# Issue is that DT::renderdatatable cannot display lists correctly.

make_nice_event_DT <- function(e){

# Add new column for the occurrences as a character string for display

# tibble::add_column(e, paste(e$occurrences,sep=","), .after=1)

e$OccurrenceList = paste(e$occurrences,sep=",")

# move occurences directly after tstamp

col_occ = which(colnames(e)=="OccurrenceList")

e = e[, c(1, col_occ, (2:ncol(e))[-col_occ])]

# Now remove the columns that have lists

e$occurrences = NULL

e$OccurrenceList.1 = NULL

e[grep("V_",colnames(e))]=NULL

return(e)

}

# find the biggest column with ZM_, and then get the number that goes with that.

# It will not be the same as the column number.

zoom_upper_limit <- function(e){

upper_limit = as.integer(str_replace(colnames(e[max(grep("ZM_",colnames(e)))]),"ZM_",""))

return(upper_limit)

}

# sliderInput("ThreadMapZoomID",

# "Zoom in and out by event similarity:",

# 1,100,5, step = 1, ticks=FALSE)

######################################################

# Just putting this code here to play with for now.

# this function finds the common events in two subsets of thread data

common_events <- function(ss1, ss2, TN, CF, n){

# get the list of ngrams for each subset of threads

e1 = count_ngrams(ss1, TN, CF, n)[1]

e2 = count_ngrams(ss2, TN, CF, n)[1]

# return the intersection

return(intersect(as.matrix(e1), as.matrix(e2)))

}

rr_grams <- function(o,TN, CF, N, R) {

# N - max length of ngram

# R = threshold for repetition

}

# Ideas for regex work

# https://stackoverflow.com/questions/35704369/identify-repetitive-pattern-in-numeric-vector-in-r-with-fuzzy-search

# sapply(1:(length(x)/2), function(m) sum(rep(x[1:m], length = length(x)) != x))

# x <- rep(c(1, 4, 2), 10)

# for(k in seq_len(length(x)/2)) {

# pat <- x[1:k]

# if (identical(rep(pat, length = length(x)), x)) {

# print(pat)

# break

# }

# }

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