v/vlib/vweb/tmpl/tmpl.v

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// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
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module tmpl
import os
import strings
const (
STR_START = 'sb.write(\''
STR_END = '\' ) '
)
pub fn compile_template(path string) string {
//lines := os.read_lines(path)
mut html := os.read_file(path) or {
panic('html failed')
return ''
}
mut header := ''
if os.file_exists('header.html') {
h := os.read_file('header.html') or {
panic('html failed')
return ''
}
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header = h.replace('\'', '"')
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}
lines := html.split_into_lines()
mut s := strings.new_builder(1000)
base := path.all_after('/').replace('.html', '')
s.writeln('module main import strings fn ${base}_view() string { // this line will get removed becase only function body is embedded
mut sb := strings.new_builder(${lines.len * 30})
header := \'$header\'
_ := header
//footer := \'footer\'
')
s.writeln(STR_START)
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mut in_css := false
for _line in lines {
line := _line.trim_space()
if line == '<style>' {
in_css = true
}
else if line == '</style>' {
in_css = false
}
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if line.contains('@if ') {
s.writeln(STR_END)
pos := line.index('@if')
s.writeln('if ' + line.right(pos + 4) + '{')
s.writeln(STR_START)
}
else if line.contains('@end') {
s.writeln(STR_END)
s.writeln('}')
s.writeln(STR_START)
}
else if line.contains('@else') {
s.writeln(STR_END)
s.writeln(' } else { ')
s.writeln(STR_START)
}
else if line.contains('@for') {
s.writeln(STR_END)
pos := line.index('@for')
s.writeln('for ' + line.right(pos + 4) + '{')
s.writeln(STR_START)
}
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else if !in_css && line.contains('.') && line.ends_with('{') {
class := line.find_between('.', '{')
s.writeln('<div class="$class">')
}
else if !in_css && line == '}' {
s.writeln('</div>')
}
// HTML, may include `@var`
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else {
s.writeln(line.replace('@', '\x24').replace('\'', '"') )
}
}
s.writeln(STR_END)
s.writeln('tmpl_res := sb.str() ')
s.writeln('return tmpl_res }')
return s.str()
}