Change "wave" and "paint" text effect captcha options from toggle to slider

Add "noise" text captcha effect slider
Add font lib to get list of system fonts
Add "font" text captcha option
ref #469

configs/template.js.example

@@ -35,9 +35,11 @@ module.exports = {
 		type: 'text',
 		generateLimit: 250,
 		text: {
+			font: 'default',
 			wave: false,
-			line: false,
+			line: 0,
-			paint: false,
+			paint: 2,
+			noise: 0,
 		},
 		grid: {
 			falses: ['○','□','♘','♢','▽','△','♖','✧','♔','♘','♕','♗','♙','♧'],

controllers/forms/globalsettings.js

@@ -4,6 +4,7 @@ const changeGlobalSettings = require(__dirname+'/../../models/forms/changeglobal
 	, dynamicResponse = require(__dirname+'/../../lib/misc/dynamic.js')
 	, themeHelper = require(__dirname+'/../../lib/misc/themes.js')
 	, config = require(__dirname+'/../../lib/misc/config.js')
+	, { fontPaths } = require(__dirname+'/../../lib/misc/fonts.js')
 	, paramConverter = require(__dirname+'/../../lib/middleware/input/paramconverter.js')
 	, { checkSchema, lengthBody, numberBody, minmaxBody, numberBodyVariable,
 		inArrayBody } = require(__dirname+'/../../lib/input/schema.js');
@@ -13,8 +14,8 @@ module.exports = {
 	paramConverter: paramConverter({
 		timeFields: ['ban_duration', 'board_defaults_filter_ban_duration', 'default_ban_duration', 'block_bypass_expire_after_time', 'dnsbl_cache_time', 'board_defaults_delete_protection_age'],
 		trimFields: ['captcha_options_grid_question', 'captcha_options_grid_trues', 'captcha_options_grid_falses','allowed_hosts', 'dnsbl_blacklists', 'other_mime_types',
-			'highlight_options_language_subset', 'global_limits_custom_css_filters', 'board_defaults_filters', 'filters', 'archive_links', 'reverse_links'],
+			'highlight_options_language_subset', 'global_limits_custom_css_filters', 'board_defaults_filters', 'filters', 'archive_links', 'reverse_links', 'captcha_options_text_font'],
-		numberFields: ['filter_mode', 'auth_level',
+		numberFields: ['filter_mode', 'auth_level', 'captcha_options_text_wave', 'captcha_options_text_paint', 'captcha_options_text_noise',
 			'captcha_options_generate_limit', 'captcha_options_grid_size',  'captcha_options_grid_image_size', 'captcha_options_num_distorts_min', 'captcha_options_num_distorts_max',
 			'captcha_options_distortion', 'captcha_options_grid_icon_y_offset', 'flood_timers_same_content_same_ip', 'flood_timers_same_content_any_ip', 'flood_timers_any_content_same_ip',
 			'block_bypass_expire_after_uses', 'rate_limit_cost_captcha', 'rate_limit_cost_board_settings', 'rate_limit_cost_edit_post',
@@ -58,7 +59,7 @@ module.exports = {
 			}, expected: false, error: 'Extra mime types must be like type/subtype' },
 			{ result: () => {
 				if (req.body.archive_links) {
-					/* eslint-disable no-useless-escape */						
+					/* eslint-disable no-useless-escape */
 					return /https?\:\/\/[^\s<>\[\]{}|\\^]+%s[^\s<>\[\]{}|\\^]*/i.test(req.body.archive_links);
 				}
 				return false;
@@ -87,6 +88,10 @@ module.exports = {
 			{ result: numberBody(req.body.captcha_options_num_distorts_max, 0, 10), expected: true, error: 'Captcha options max distorts must be a number from 0-10' },
 			{ result: minmaxBody(req.body.captcha_options_num_distorts_min, req.body.captcha_options_num_distorts_max), expected: true, error: 'Captcha options distorts min must be less than max' },
 			{ result: numberBody(req.body.captcha_options_distortion, 0, 50), expected: true, error: 'Captcha options distortion must be a number from 0-50' },
+			{ result: inArrayBody(req.body.captcha_options_text_font, fontPaths), expected: true, error: 'Invalid captcha options text font' },
+			{ result: numberBody(req.body.captcha_options_text_wave, 0, 10), expected: true, error: 'Captcha options text wave effect strength must be a number form 0-10' },
+			{ result: numberBody(req.body.captcha_options_text_paint, 0, 10), expected: true, error: 'Captcha options text paint effect strength must be a number from 0-10' },
+			{ result: numberBody(req.body.captcha_options_text_noise, 0, 10), expected: true, error: 'Captcha options text noise effect strength must be a number from 0-10' },
 			{ result: numberBody(req.body.dnsbl_cache_time), expected: true, error: 'Invalid dnsbl cache time' },
 			{ result: numberBody(req.body.flood_timers_same_content_same_ip), expected: true, error: 'Invalid flood time same content same ip' },
 			{ result: numberBody(req.body.flood_timers_same_content_any_ip), expected: true, error: 'Invalid flood time same contenet any ip' },

lib/captcha/generators/text.js

@@ -49,6 +49,10 @@ module.exports = async () => {
 		.fill('#000000')
 		.fontSize(65);
 
+	if (captchaOptions.text.font !== 'default') {
+		captcha.font(captchaOptions.text.font);
+	}
+
 	//draw each character at their x based on the characterWidth()
 	const textWidth = totalTextWidth(text);
 	const startX = (width-textWidth)/2;
@@ -58,27 +62,26 @@ module.exports = async () => {
 		charX += characterWidth(text[i]);
 	}
 
-	/*
-		TODO: possibilities for customising some of the values in these options.
-		Some can be converted to number inputs and 0=off?
-	*/
 	//draw optional line/strikethrough
-	if (captchaOptions.text.line) {
+	if (captchaOptions.text.line === true) {
 		const lineY = await randomRange(35,45);
 		captcha.drawRectangle(startX, lineY, startX+textWidth, lineY+4);
 	}
 
 	//add optional wave effect
-	if (captchaOptions.text.wave) {
+	if (captchaOptions.text.wave > 0) {
-		captcha.wave(5, width/4);
+		captcha.wave(captchaOptions.text.wave, width/4);
 	}
 
 	//add optional paint effect
-	if (captchaOptions.text.paint) {
+	if (captchaOptions.text.paint > 0) {
-		captcha.paint(2);
+		captcha.paint(captchaOptions.text.paint);
 	}
 
-	//TODO: noise effect
+	//add optional noise effect
+	if (captchaOptions.text.noise > 0) {
+		captcha.noise(captchaOptions.text.noise);
+	}
 
 	//create an array of distortions and apply to the image, if distortion is enabled
 	const { distortion, numDistorts } = captchaOptions;

lib/misc/fonts.js

@@ -0,0 +1,21 @@
+'use strict';
+
+const fontList = require('child_process')
+	.execSync('fc-list -f "%{file}:%{family[0]} %{style[0]}\n"')
+	.toString()
+	.split('\n') //split by newlines, like here ^
+	.filter(line => line) //filter empty lines
+	.map(line => {
+		//map to an object with path and name
+		const [path, name] = line.split(':');
+		return { path, name };
+	})
+	.sort((a, b) => {
+		//alphabetical name sort
+		return a.name.localeCompare(b.name);
+	});
+
+module.exports = {
+	fontList,
+	fontPaths: new Set(['default', ...fontList.map(f => f.path)]), //memoize paths
+};

migrations/0.8.0.js

@@ -5,9 +5,11 @@ module.exports = async(db, redis) => {
 	await db.collection('globalsettings').updateOne({ _id: 'globalsettings' }, {
 		'$set': {
 			'captchaOptions.text': {
+				'font': 'default',
 				'line': false,
-				'wave': false,
+				'wave': 0,
-				'paint': false,
+				'paint': 2,
+				'noise': 0,
 			},
 			'captchaOptions.grid.falses': ['○','□','♘','♢','▽','△','♖','✧','♔','♘','♕','♗','♙','♧'],
 			'captchaOptions.grid.trues': ['●','■','♞','♦','▼','▲','♜','✦','♚','♞','♛','♝','♟','♣'],

models/forms/changeglobalsettings.js

@@ -78,9 +78,11 @@ module.exports = async (req, res) => {
 				falses: arraySetting(req.body.captcha_options_grid_falses, oldSettings.captchaOptions.grid.falses),
 			},
 			text: {
+				font: trimSetting(req.body.captcha_options_text_font, oldSettings.captchaOptions.text.font),
 				line: booleanSetting(req.body.captcha_options_text_line, oldSettings.captchaOptions.text.line),
-				wave: booleanSetting(req.body.captcha_options_text_wave, oldSettings.captchaOptions.text.wave),
+				wave: numberSetting(req.body.captcha_options_text_wave, oldSettings.captchaOptions.text.wave),
-				paint:  booleanSetting(req.body.captcha_options_text_paint, oldSettings.captchaOptions.text.paint),
+				paint:  numberSetting(req.body.captcha_options_text_paint, oldSettings.captchaOptions.text.paint),
+				noise:  numberSetting(req.body.captcha_options_text_noise, oldSettings.captchaOptions.text.noise),
 			},
 			numDistorts: {
 				min: numberSetting(req.body.captcha_options_num_distorts_min, oldSettings.captchaOptions.numDistorts.min),

models/pages/globalmanage/settings.js

@@ -1,6 +1,7 @@
 'use strict';
 
 const config = require(__dirname+'/../../../lib/misc/config.js')
+	, { fontList } = require(__dirname+'/../../../lib/misc/fonts.js')
 	, { themes, codeThemes } = require(__dirname+'/../../../lib/misc/themes.js')
 	, { countryNamesMap, countryCodes } = require(__dirname+'/../../../lib/misc/countries.js');
 
@@ -16,6 +17,7 @@ module.exports = async (req, res) => {
 			countryCodes,
 			themes,
 			codeThemes,
+			fontList,
 		});
 
 };

views/pages/globalmanagesettings.pug

@@ -26,6 +26,7 @@ block content
 	.form-wrapper.flexleft.mt-10
 		form.form-post(action=`/forms/global/settings`, enctype='application/x-www-form-urlencoded', method='POST')
 			input(type='hidden' name='_csrf' value=csrf)
+			input.row(type='submit', value='save settings')
 			.row.wrap.sb
 				.col.mr-5
 
@@ -193,20 +194,26 @@ block content
 						h4.mv-5 Text Captcha Options
 					.row
 						.label Font
-						select(name='captcha_options_text_font' disabled)
+						select(name='captcha_options_text_font')
-							option(selected=true) Default
+							option(value='default' selected=(settings.captchaOptions.text.font === 'default')) Default
+							each font in fontList
+								option(value=font.path selected=(settings.captchaOptions.text.font === font.path)) #{font.name}
 					.row
 						.label Strikethrough Effect
 						label.postform-style.ph-5
 							input(type='checkbox', name='captcha_options_text_line', value='true' checked=settings.captchaOptions.text.line)
 					.row
-						.label Wave Effect
+						.label Wave Effect Strength
+						label.postform-style.ph-5
+							input(type='range' name='captcha_options_text_wave' min='0' max='10' value=settings.captchaOptions.text.wave)
+					.row
+						.label Paint Effect Strength
 						label.postform-style.ph-5
-							input(type='checkbox', name='captcha_options_text_wave', value='true' checked=settings.captchaOptions.text.wave)
+							input(type='range' name='captcha_options_text_paint' min='0' max='10' value=settings.captchaOptions.text.paint)
 					.row
-						.label Paint Effect
+						.label Noise Effect Strength
 						label.postform-style.ph-5
-							input(type='checkbox', name='captcha_options_text_paint', value='true' checked=settings.captchaOptions.text.text)
+							input(type='range' name='captcha_options_text_noise' min='0' max='10' value=settings.captchaOptions.text.noise)
 					.row
 						h4.mv-5 Captcha Distortion
 					.row