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# Copyright (c) 2019 - 2023, Adrian Dusa
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, in whole or in part, are permitted provided that the
# following conditions are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * The names of its contributors may NOT be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL ADRIAN DUSA BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
`intersection` <- function(..., snames = "", noflevels = NULL) {
dots <- substitute(list(...))
if (length(dots) > 1) {
for (i in seq(2, length(dots))) {
dots[[i]] <- recreate(dots[[i]])
}
}
dots <- eval(dots)
snames <- recreate(substitute(snames))
if (length(dots) == 0) {
stopError("Nothing to intersect.")
}
if (length(dots[[1]]) == 0) {
return(invisible(character(0)))
}
snames <- splitstr(snames)
sl <- ifelse(identical(snames, ""), FALSE, ifelse(all(nchar(snames) == 1), TRUE, FALSE))
isol <- NULL
for (i in seq(length(dots))) {
x <- dots[[i]]
if (methods::is(dots[[i]], "QCA_min")) {
if (identical(snames, "")) {
snames <- dots[[i]]$tt$options$conditions
if (dots[[i]]$options$use.letters) {
snames <- LETTERS[seq(length(snames))]
}
}
if (is.element("i.sol", names(x))) {
elengths <- unlist(lapply(dots[[i]]$i.sol, function(x) length(x$solution)))
isol <- paste(rep(names(dots[[i]]$i.sol), each = elengths), unlist(lapply(elengths, seq)), sep = "-")
dots[[i]] <- as.vector(unlist(lapply(dots[[i]]$i.sol, function(x) {
lapply(x$solution, paste, collapse = " + ")
})))
}
else {
dots[[i]] <- as.vector(unlist(lapply(dots[[i]]$solution, paste, collapse = " + ")))
}
}
else if (methods::is(dots[[i]], "admisc_deMorgan")) {
isol <- attr(x, "isol")
dots[[i]] <- unlist(x)
if (!is.null(attr(x, "snames"))) {
attr(dots[[i]], "snames") <- attr(x, "snames")
}
if (!is.null(attr(x, "isol"))) {
attr(dots[[i]], "isol") <- attr(x, "isol")
}
attr(dots[[i]], "minimized") <- attr(x, "minimized")
}
if (!is.character(dots[[i]])) {
stopError("Unrecognised input.")
}
}
arglist <- list(snames = snames)
if (!is.null(noflevels)) {
arglist$noflevels <- noflevels
}
if (requireNamespace("QCA", quietly = TRUE)) {
combs <- QCA::createMatrix(unlist(lapply(dots, length)))
} else {
combs <- getMatrix(unlist(lapply(dots, length)))
}
expressions <- result <- character(nrow(combs))
conj <- ifelse(sl, "", "*")
for (i in seq(nrow(combs))) {
x <- combs[i, ] + 1
expression <- c()
for (j in seq(length(x))) {
expression <- c(expression, dots[[j]][x[j]])
}
disj <- grepl("[+]", expression)
if (any(disj)) {
expression[disj] <- paste("(", expression[disj], ")", sep = "")
}
if (any(!disj)) {
ndisj <- which(!disj)
if (any(ndisj == 1)) {
expression[1] <- paste(expression[1], conj, sep = "")
}
if (any(ndisj == length(expression))) {
expression[length(expression)] <- paste(conj, expression[length(expression)], sep = "")
}
if (length(ndisj <- setdiff(ndisj, c(1, length(expression)))) > 0) {
expression[ndisj] <- paste(conj, expression[ndisj], conj, sep = "")
}
}
expressions[i] <- paste(expression, collapse = "")
expressions[i] <- gsub("\\*\\(", "(", expressions[i])
result[i] <- do.call(expandBrackets, c(list(expressions[i]), arglist))
}
if (sl) {
for (i in seq(length(expressions))) {
result[i] <- gsub("[*]", "", result[i])
}
}
attr(result, "expressions") <- expressions
if (!is.null(isol)) {
attr(result, "isol") <- isol
}
class(result) <- c("character", "admisc_intersection")
return(result)
}
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