view src/luan/modules/lucene/Web_search.luan @ 1537:f7649ad6e3e7

minor
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 07 Aug 2020 13:38:25 -0600
parents 34ae786771b6
children c6b50b7b958c
line wrap: on
line source
local Luan = require "luan:Luan.luan"
local error = Luan.error
local pairs = Luan.pairs or error()
local ipairs = Luan.ipairs or error()
local range = Luan.range or error()
local stringify = Luan.stringify or error()
local eval = Luan.eval or error()
local type = Luan.type or error()
local Io = require "luan:Io.luan"
local Http = require "luan:http/Http.luan"
local String = require "luan:String.luan"
local string_to_number = String.to_number or error()
local Html = require "luan:Html.luan"
local html_encode = Html.encode or error()
local Number = require "luan:Number.luan"
local Table = require "luan:Table.luan"
local size = Table.size or error()


local Web_search = {}

local function style()
%>
			body {
				font-family: sans-serif;
				margin: 2em 5%;
			}
			h2 {
				margin-bottom: .5em;
			}
			label {
				text-align: right;
				min-width: 6em;
				display: inline-block;
				margin-right: .5em;
			}
			input, textarea {
				margin-top: 1em;
				font: inherit;
			}
			span[tip] {
				color: #888;
				font-size: smaller;
			}
			input[type="submit"] {
				cursor: pointer;
				padding: .5em;
				border-radius: 4px;
			}
			textarea[name="old"] {
				display: none;
			}
<%
end

local function form()
%>
<!doctype html>
<html>
	<head>
		<title>Lucene</title>
		<style>
<%			style() %>
		</style>
	</head>
	<body>
		<h2>Lucene Query</h2>
		<form>
			<div>
				<label>Query:</label>
				<input type=text name="query" size="80" autofocus>
			</div>
			<div>
				<label></label>
				<span tip>Query examples: <i>type:user</i> or <i>+type:user +name:Joe"</i></span>
			</div>
			<div>
				<label>Max Rows:</label>
				<input type=text name="rows" value="100" size="3" maxlength="5">
			</div>
			<div>
				<label>Sort:</label>
				<input type=text name="sort" size="60">
			</div>
			<div>
				<label></label>
				<span tip>Sort examples: <i>name, id</i></span>
			</div>
			<div>
				<label></label>
				<input type="submit">
			</div>
		</form>
	</body>
</html>
<%
end


local function index_of(tbl,val)
	for i, v in ipairs(tbl) do
		if v == val then
			return i
		end
	end
	local n = #tbl + 1
	tbl[n] = val
	return n
end

local function result(index)
	local query = Http.request.parameters.query
	local rows = string_to_number(Http.request.parameters.rows)
	local sort = Http.request.parameters.sort
	local results = index.search(query,1,rows,{sort=sort})
	local headers = {}
	local table = {}
	for _, doc in ipairs(results) do
		local row = {}
		for field, value in pairs(doc) do
			row[index_of(headers,field)] = value
		end
		row.doc = doc
		table[#table+1] = row
	end
%>
<!doctype html>
<html>
	<head>
		<title>Lucene</title>
		<style>
<%			style() %>
			table {
				border-collapse: collapse;
				width: 100%;
				font-size: smaller;
			}
			th, td {
				text-align: left;
				padding: .5em;
				border: solid 1px #ddd;
			}
		</style>
	</head>
	<body>
		<h2>Lucene Results</h2>
		<p><label>Query:</label> <b><%=html_encode(query)%></b></p>
		<p><label>Sort:</label> <b><%=html_encode(sort)%></b></p>
		<table>
			<tr>
				<th></th>
<%				for _, header in ipairs(headers) do %>
					<th><%=header%></th>
<%				end %>
			</tr>
<%
			for i, row in ipairs(table) do
				local id = row.doc.id
%>
				<tr>
					<td>
						<a href="?id=<%=id%>"><%=i%></a>
					</td>
<%
					for col in range(1, #headers) do
						local val = row[col]
						%><td><%= val and stringify(val) or "" %></td><%
					end
%>
				</tr>
<%			end %>
		</table>
	</body>
</html>
<%
end


local function edit(index)
	local id = string_to_number(Http.request.parameters.id)
	local doc = index.get_document("id:"..id)
	doc = stringify(doc,{strict=true,number_types=true})
	doc = html_encode(doc)
%>
<!doctype html>
<html>
	<head>
		<title>Lucene</title>
		<style>
<%			style() %>
		</style>
	</head>
	<body>
		<h2>Lucene Edit</h2>
		<form action="?" method=post>
			<input hidden name=id value="<%=id%>">
			<textarea name="old" ><%=doc%></textarea>
			<div><textarea name="doc" rows="20" cols="90" autofocus><%=doc%></textarea></div>
			<div><input type="submit" value="Update"></div>
		</form>
	</body>
</html>
<%
end


local function equal(tbl1,tbl2)
	if size(tbl1) ~= size(tbl2) then
		return false
	end
	for key, value1 in pairs(tbl1) do
		local value2 = tbl2[key]
		if type(value1) == "table" then
			if type(value2) ~= "table" or not equal(value1,value2) then
				return false
			end
		elseif value1 ~= value2 then
			return false
		end
	end
	return true
end

local function update(index)
	local doc = Http.request.parameters.doc
	doc = eval( doc, "lucene", Number )
	local old = Http.request.parameters.old
	old = eval( old, "lucene", Number )
	local id = Http.request.parameters.id
	local msg = "Lucene Updated"
	index.run_in_transaction( function()
		local current = index.get_document("id:"..id)
		if not equal(current,old) then
			msg = "ERROR: document has changed"
			return
		end
		if doc == nil then
			index.delete("id:"..id)
		else
			index.save(doc)
		end
	end )
%>
<!doctype html>
<html>
	<head>
		<title>Lucene</title>
		<style>
<%			style() %>
		</style>
	</head>
	<body>
		<h2><%=msg%></h2>
	</body>
</html>
<%
end


function Web_search.of(index)
	index or error "index is nil"

	return function()
		Io.stdout = Http.response.text_writer()
		local query = Http.request.parameters.query
		if Http.request.parameters.query ~= nil then
			result(index)
		elseif Http.request.parameters.doc ~= nil then
			update(index)
		elseif Http.request.parameters.id ~= nil then
			edit(index)
		else
			form()
		end
	end

end

return Web_search