1 | import java.io.*;
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2 | import java.util.regex.*;
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3 | import java.util.*;
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4 |
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5 | /** HTML Maker - takes a simple input file (index.html) and outputs HTML (also index.html)
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6 | See:
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7 | http://tinybrain.blog.de/2015/04/14/an-example-for-the-three-levels-20236978/
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8 | http://tinybrain.blog.de/2015/04/14/javax-better-programming-20236764/
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9 | */
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10 |
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11 | public class main {
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12 | static List<Section> sections = new ArrayList<Section>();
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13 |
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14 | public static void main(String[] args) {
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15 | String s = readTextFile("input/index.html", "");
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16 | System.out.println("Processing input:\n" + s);
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17 |
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18 | for (String line : toLines(s)) {
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19 | int idx = line.indexOf(':');
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20 | if (idx >= 0) {
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21 | String left = line.substring(0, idx), right = line.substring(idx+1).trim();
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22 | Matcher matcher = Pattern.compile("[^,]+").matcher(left);
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23 | while (matcher.find()) {
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24 | String leftpart = matcher.group().trim();
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25 | makeSection(leftpart, right);
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26 | }
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27 | }
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28 | }
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29 |
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30 | String html = renderSections();
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31 | saveTextFile("output/index.html", html);
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32 | System.out.println("\nHTML output:\n" + html);
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33 | }
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34 |
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35 | public static void makeSection(String left, String right) {
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36 | sections.add(new Section(left, right));
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37 | }
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38 |
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39 | public static String renderSections() {
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40 | StringBuffer head = new StringBuffer(), body = new StringBuffer();
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41 | String title = findSection("title");
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42 | if (title == null) title = "Untitled";
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43 |
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44 | for (Section section : sections) {
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45 | if (section.tag.equals("title"))
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46 | continue;
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47 | else if (section.tag.equals("text"))
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48 | body.append("<p>" + section.content + "</p>\n");
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49 | else if (section.tag.equals("link"))
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50 | body.append("<p><a href=\"http://" + section.content + "\">" + section.content + "</a></p>\n");
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51 | else if (section.tag.equals("mail-link"))
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52 | body.append("<p><a href=\"mailto:" + section.content + "\">" + section.content + "</a></p>\n");
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53 | else
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54 | body.append("<" + section.tag + ">" + section.content + "</" + section.tag + ">\n");
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55 | }
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56 | return "<html>\n" + "<head>" + "<title>" + title + "</title>" + "</head>\n"
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57 | + "<body>\n" + body + "</body></html>\n";
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58 | }
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59 |
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60 | public static String readTextFile(String fileName, String defaultContents) {
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61 | try {
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62 | if (!new java.io.File(fileName).exists())
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63 | return defaultContents;
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64 |
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65 | FileInputStream fileInputStream = new FileInputStream(fileName);
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66 | InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream, "UTF-8");
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67 | return loadTextFile(inputStreamReader);
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68 | } catch (IOException e) {
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69 | throw new RuntimeException(e);
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70 | }
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71 | }
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72 |
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73 | public static String loadTextFile(Reader reader) throws IOException {
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74 | StringBuilder builder = new StringBuilder();
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75 | try {
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76 | BufferedReader bufferedReader = new BufferedReader(reader);
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77 | String line;
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78 | while ((line = bufferedReader.readLine()) != null)
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79 | builder.append(line).append('\n');
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80 | } finally {
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81 | reader.close();
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82 | }
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83 | return builder.length() == 0 ? "" : builder.substring(0, builder.length()-1);
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84 | }
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85 |
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86 | /** writes safely (to temp file, then rename) */
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87 | public static void saveTextFile(String fileName, String contents) {
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88 | try {
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89 | java.io.File file = new java.io.File(fileName);
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90 | java.io.File parentFile = file.getParentFile();
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91 | if (parentFile != null)
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92 | parentFile.mkdirs();
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93 | String tempFileName = fileName + "_temp";
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94 | FileOutputStream fileOutputStream = new FileOutputStream(tempFileName);
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95 | OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileOutputStream, "UTF-8");
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96 | PrintWriter printWriter = new PrintWriter(outputStreamWriter);
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97 | printWriter.print(contents);
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98 | printWriter.close();
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99 | if (file.exists() && !file.delete())
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100 | throw new IOException("Can't delete " + fileName);
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101 |
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102 | if (!new java.io.File(tempFileName).renameTo(file))
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103 | throw new IOException("Can't rename " + tempFileName + " to " + fileName);
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104 | } catch (IOException e) {
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105 | throw new RuntimeException(e);
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106 | }
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107 | }
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108 |
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109 | public static List<String> toLines(String s) {
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110 | List<String> lines = new ArrayList<String>();
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111 | int start = 0;
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112 | while (true) {
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113 | int i = toLines_nextLineBreak(s, start);
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114 | if (i < 0) {
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115 | if (s.length() > start) lines.add(s.substring(start));
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116 | break;
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117 | }
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118 |
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119 | lines.add(s.substring(start, i));
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120 | if (s.charAt(i) == '\r' && i+1 < s.length() && s.charAt(i+1) == '\n')
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121 | i += 2;
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122 | else
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123 | ++i;
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124 |
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125 | start = i;
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126 | }
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127 | return lines;
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128 | }
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129 |
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130 | private static int toLines_nextLineBreak(String s, int start) {
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131 | for (int i = start; i < s.length(); i++) {
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132 | char c = s.charAt(i);
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133 | if (c == '\r' || c == '\n')
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134 | return i;
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135 | }
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136 | return -1;
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137 | }
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138 |
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139 | static class Section {
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140 | String tag, content;
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141 |
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142 | Section(String tag, String content) {
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143 | this.tag = tag;
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144 | this.content = content;
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145 | }
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146 | }
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147 |
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148 | static String findSection(String tag) {
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149 | for (Section section : sections)
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150 | if (section.tag.equals(tag))
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151 | return section.content;
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152 | return null;
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153 | }
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154 | }
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