# The MIT License
#
# Copyright (c) 2010 RecycleBin.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#' 板一覧
#'
#' 板一覧をデータフレームとして取得します。
#'
#' @param bbsmenu.uri
#' メニューの URI
#'
#' @details
#' 以下のデータフレームが返ります。
#'
#' \code{Category} カテゴリ名。
#'
#' \code{Name} 板名。
#'
#' \code{URI} 板 (ホストではない) のルート URI。
#'
#' @export
getBoardList <- function(bbsmenu.uri = "http://menu.2ch.net/bbsmenu.html")
{
if (length(bbsmenu.uri) > 1)
{
warning("only the first element will be used");
}
bbsmenu <- r2ch.getURI(bbsmenu.uri[1]);
bbsmenu <- lapply(bbsmenu, r2ch.rawToChar);
category <- NULL;
name <- NULL;
uri <- NULL;
category.current <- NULL;
category.regex <- "<BR><BR><B>.+</B>";
board.regex <- "<A HREF=http://\\w+\\.2ch\\.net/\\w+/>.+</A>";
board.uri.regex <- substring(board.regex, 1, nchar(board.regex) - nchar(".+</A>"));
for (i in 1 : length(bbsmenu))
{
category.match <- regexpr(category.regex, bbsmenu[i]);
if (category.match > 0)
{
category.start <- category.match + nchar("<BR><BR><B>");
category.end <- (category.match - 1) + attr(category.match, "match.length") - nchar("</B>");
category.current <- substring(bbsmenu[i], category.start, category.end);
next();
}
else if (is.null(category.current))
{
next();
}
board.match <- regexpr(board.regex, bbsmenu[i]);
if (board.match < 0)
{
next();
}
board.uri.match <- regexpr(board.uri.regex, bbsmenu[i]); # 定義から必ずマッチする。
tag.start.length <- attr(board.uri.match, "match.length");
board.name.start <- board.match + tag.start.length;
board.name.end <- (board.match - 1) + attr(board.match, "match.length") - nchar("</A>");
board.uri.start <- board.uri.match + nchar("<A HREF=");
board.uri.end <- (board.uri.match - 1) + tag.start.length - nchar(">");
board.uri <- substring(bbsmenu[i], board.uri.start, board.uri.end);
board.name <- substring(bbsmenu[i], board.name.start, board.name.end);
category <- c(category, category.current);
name <- c(name, board.name);
uri <- c(uri, board.uri);
}
return(data.frame(Category = category, Name = name, URI = uri));
}
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