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v/vlib/vweb/tmpl/tmpl.v

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// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module tmpl
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import os
import strings
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const (
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str_start = "sb.write(\'"
str_end = "\' ) "
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)
// compile_file compiles the content of a file by the given path as a template
pub fn compile_file(path string) string {
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mut html := os.read_file(path)or{
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panic('html failed')
}
return compile_template(html)
}
pub fn compile_template(content string) string {
// lines := os.read_lines(path)
mut html := content
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mut header := ''
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if os.exists('header.html') && html.contains('@header') {
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h := os.read_file('header.html')or{
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panic('reading file header.html failed')
}
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header = h.replace("\'", '"')
html = header + html
}
lines := html.split_into_lines()
mut s := strings.new_builder(1000)
// base := path.all_after_last('/').replace('.html', '')
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s.writeln("
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mut sb := strings.new_builder(${lines.len * 30})
header := \' \' // TODO remove
_ = header
//footer := \'footer\'
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")
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s.writeln(str_start)
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mut in_css := true // false
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for _line in lines {
line := _line.trim_space()
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if line == '<style>' {
in_css = true
}
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else if line == '</style>' {
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// in_css = false
}
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if line.contains('@if ') {
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s.writeln(str_end)
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pos := line.index('@if') or {
continue
}
s.writeln('if ' + line[pos + 4..] + '{')
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s.writeln(str_start)
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}
else if line.contains('@end') {
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s.writeln(str_end)
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s.writeln('}')
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s.writeln(str_start)
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}
else if line.contains('@else') {
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s.writeln(str_end)
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s.writeln(' } else { ')
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s.writeln(str_start)
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}
else if line.contains('@for') {
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s.writeln(str_end)
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pos := line.index('@for') or {
continue
}
s.writeln('for ' + line[pos + 4..] + '{')
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s.writeln(str_start)
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}
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else if !in_css && line.contains('.') && line.ends_with('{') {
class := line.find_between('.', '{')
s.writeln('<div class="$class">')
}
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else if !in_css && line == '}' {
s.writeln('</div>')
}
// HTML, may include `@var`
else {
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s.writeln(line.replace('@', '\x24').replace("'", '"'))
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}
}
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s.writeln(str_end)
s.writeln('tmpl_res := sb.str() }')
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return s.str()
}