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SearchHelp.inc.php
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<?
// Contributed to the Sandcastle Help File Builder project by Thomas Levesque
class
Ranking
{
public
$
filename
;
public
$
pageTitle
;
public
$
rank
;
function
__construct
(
$
file
,
$
title
,
$
rank
)
{
$
this
->
filename
=
$
file
;
$
this
->
pageTitle
=
$
title
;
$
this
->
rank
=
$
rank
;
}
}
/// <summary>
/// Split the search text up into keywords
/// </summary>
/// <param name="keywords">The keywords to parse</param>
/// <returns>A list containing the words for which to search</returns>
function
ParseKeywords
(
$
keywords
)
{
$
keywordList
=
array
();
$
words
=
preg_split
(
"
/[^\w]+/
"
,
$
keywords
);
foreach
(
$
words
as
$
word
)
{
$
checkWord
=
strtolower
(
$
word
);
$
first
=
substr
(
$
checkWord
,
0
,
1
);
if
(
strlen
(
$
checkWord
) >
2
&& !
ctype_digit
(
$
first
) && !
in_array
(
$
checkWord
,
$
keywordList
))
{
array_push
(
$
keywordList
,
$
checkWord
);
}
}
return
$
keywordList
;
}
/// <summary>
/// Search for the specified keywords and return the results as a block of
/// HTML.
/// </summary>
/// <param name="keywords">The keywords for which to search</param>
/// <param name="fileInfo">The file list</param>
/// <param name="wordDictionary">The dictionary used to find the words</param>
/// <param name="sortByTitle">True to sort by title, false to sort by
/// ranking</param>
/// <returns>A block of HTML representing the search results.</returns>
function
Search
(
$
keywords
,
$
fileInfo
,
$
wordDictionary
,
$
sortByTitle
)
{
$
sb
=
"
<ol>
"
;
$
matches
=
array
();
$
matchingFileIndices
=
array
();
$
rankings
=
array
();
$
isFirst
=
true
;
foreach
(
$
keywords
as
$
word
)
{
if
(!
array_key_exists
(
$
word
,
$
wordDictionary
))
{
return
"
<strong>Nothing found</strong>
"
;
}
$
occurrences
=
$
wordDictionary
[
$
word
];
$
matches
[
$
word
] =
$
occurrences
;
$
occurrenceIndices
=
array
();
// Get a list of the file indices for this match
foreach
(
$
occurrences
as
$
entry
)
array_push
(
$
occurrenceIndices
, (
$
entry
>>
16
));
if
(
$
isFirst
)
{
$
isFirst
=
false
;
foreach
(
$
occurrenceIndices
as
$
i
)
{
array_push
(
$
matchingFileIndices
,
$
i
);
}
}
else
{
// After the first match, remove files that do not appear for
// all found keywords.
for
(
$
idx
=
0
;
$
idx
<
count
(
$
matchingFileIndices
);
$
idx
++)
{
if
(!
in_array
(
$
matchingFileIndices
[
$
idx
],
$
occurrenceIndices
))
{
array_splice
(
$
matchingFileIndices
,
$
idx
,
1
);
$
idx
--;
}
}
}
}
if
(
count
(
$
matchingFileIndices
) ==
0
)
{
return
"
<strong>Nothing found</strong>
"
;
}
// Rank the files based on the number of times the words occurs
foreach
(
$
matchingFileIndices
as
$
index
)
{
// Split out the title, filename, and word count
$
fileIndex
=
explode
(
"\x00"
,
$
fileInfo
[
$
index
]);
$
title
=
$
fileIndex
[
0
];
$
filename
=
$
fileIndex
[
1
];
$
wordCount
=
intval
(
$
fileIndex
[
2
]);
$
matchCount
=
0
;
foreach
(
$
keywords
as
$
words
)
{
$
occurrences
=
$
matches
[
$
word
];
foreach
(
$
occurrences
as
$
entry
)
{
if
((
$
entry
>>
16
) ==
$
index
)
$
matchCount
+=
$
entry
&
0xFFFF
;
}
}
$
r
=
new
Ranking
(
$
filename
,
$
title
,
$
matchCount
*
1000
/
$
wordCount
);
array_push
(
$
rankings
,
$
r
);
if
(
count
(
$
rankings
) >
99
)
break
;
}
// Sort by rank in descending order or by page title in ascending order
if
(
$
sortByTitle
)
{
usort
(
$
rankings
,
"
cmprankbytitle
"
);
}
else
{
usort
(
$
rankings
,
"
cmprank
"
);
}
// Format the file list and return the results
foreach
(
$
rankings
as
$
r
)
{
$
f
=
$
r
->
filename
;
$
t
=
$
r
->
pageTitle
;
$
sb
.=
"
<li><a href=
\"
$
f
\"
target=
\"
_blank
\"
>
$
t
</a></li>
"
;
}
$
sb
.=
"
</ol
"
;
if
(
count
(
$
rankings
) <
count
(
$
matchingFileIndices
))
{
$
c
=
count
(matchingFileIndices) -
count
(rankings);
$
sb
.=
"
<p>Omitted
$
c
more results</p>
"
;
}
return
$
sb
;
}
function
cmprank
(
$
x
,
$
y
)
{
return
$
y
->
rank
-
$
x
->
rank
;
}
function
cmprankbytitle
(
$
x
,
$
y
)
{
return
strcmp
(
$
x
->
pageTitle
,
$
y
->
pageTitle
);
}
?>
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