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<script src="/js/jquery.js" type="text/javascript"></script>
<script src="/js/url-search-params.js" type="text/javascript"></script>
<script src="/js/loadingoverlay.min.js" type="text/javascript"></script>
<script src="/js/require.js" type="text/javascript"></script>
<script language="Javascript">
function escapeHtml( text ) {
return text.replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">" );
}
function draw_ranklist( query, results ) {
var html = '';
if( results.length == 0 ) {
return "<p>No hits for query '" + query + "'...</p>";
} else {
html += "<p>" + results.length + " hits found</p>";
}
var start = 1;
html += "<ol class=\"ranklist\" start=\"" + start + "\">";
for( var i = 0; i < results.length; i++ ) {
var rank = results[i];
var docid = rank['docid'];
var abstract = rank['abstract'];
var title = rank['title'];
if( title == '' ) {
title = 'No title';
}
html += "<li>";
html += "<div class='title'>"
html += "<a href=\"" + docid + "\">" + title + "</a></div>";
if( abstract != '' ) {
html += "<div class='abstract'>" + abstract + "</div>";
}
html += "</li>";
}
html += "</ol>";
return html;
}
function submitQuery( ) {
try {
if( window.location.pathname.includes( "/search/") ) {
var q = $( "#query" ).val( );
executeQuery( q );
return false;
} else {
return true;
}
} catch( e ) {
alert( e );
}
}
var index_loaded = false;
var SQL;
var db;
var stmt;
function loadIndex( success, fail ) {
if( !index_loaded ) {
const xhr = new XMLHttpRequest( );
xhr.open( 'GET', '/index/posts.db', true );
xhr.responseType = 'arraybuffer';
xhr.onload = e => {
if( ( xhr.status == 0 ) || ( xhr.status == 200 ) ) {
const uInt8Array = new Uint8Array( xhr.response );
requirejs(["/js/sql-wasm.js"], function(initSqlJs) {
SQL = initSqlJs( {
locateFile: file => `/js/${file}`
} );
initSqlJs( ).then( function( SQL ) {
db = new SQL.Database(uInt8Array);
stmt = db.prepare( "select uri as docid,title,snippet(posts, 2, '<b>', '</b>', '...', 50) as abstract from posts where posts MATCH @query ORDER BY bm25(posts)" );
index_loaded = true;
success( );
} );
} );
} else {
const uInt8Array = new Uint8Array( xhr.response );
const decoder = new TextDecoder( );
const msg = decoder.decode( uInt8Array );
fail( xhr.status, xhr.statusText, msg );
}
}
xhr.send( );
} else {
success( );
}
}
function executeQuery( query ) {
$( "#query" ).LoadingOverlay( "show" );
loadIndex(
function( ) {
stmt.bind( {'@query' : query} );
var html;
try {
var results = [];
while( stmt.step( ) ) {
var row = stmt.getAsObject( );
results.push( row );
}
html = draw_ranklist( query, results );
} catch( e ) {
html = "<pre><font color='red'>There was an error executing the query '" + query + "', reason: " + e + "</font></pre>\n";
}
$( '#ranklist' ).html( html );
$( "#query" ).LoadingOverlay( "hide" );
},
function( status, statusText, msg ) {
var html = "<pre><font color='red'>There was an error executing the query '" + query + "', reason: " + status + " " + statusText + "</font></pre>\n";
$( '#ranklist' ).html( html );
$( "#query" ).LoadingOverlay( "hide" );
}
);
}
$( window ).load( function( ) {
var paramsString = window.location.search;
var searchParams = new URLSearchParams( paramsString );
if( searchParams.has( "q" ) ) {
var q = searchParams.get( "q" )
$( "#query" ).val( q );
executeQuery( q );
} else {
// TODO: come up with something here
} // Show full page LoadingOverlay
} );
$( window ).unload( function( ) {
if( index_loaded ) {
stmt.free( );
db.close( );
index_loaded = false;
}
} );
</script>
<div id="ranklist">
</div>
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