From a453bf2f909e0ea01b0649ce8dc42d54689f738f Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Tue, 11 May 2021 19:54:23 +0100
Subject: refactor

---
 modules/html.source.sh | 147 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 modules/html.source.sh

(limited to 'modules/html.source.sh')

diff --git a/modules/html.source.sh b/modules/html.source.sh
new file mode 100644
index 0000000..9fb4a30
--- /dev/null
+++ b/modules/html.source.sh
@@ -0,0 +1,147 @@
+html::special () {
+    $SED '
+        s|\&|\&amp;|g;
+        s|<|\&lt;|g;
+        s|>|\&gt;|g;
+    ' <<< "$@"
+}
+
+html::make_paragraph () {
+    local -r text="$1"; shift
+    test -n "$text" && echo "<p>$(html::special "$text")</p>"
+}
+
+html::make_heading () {
+    local -r text=$($SED -E 's/^#+ //' <<< "$1"); shift
+    local -r level="$1"; shift
+
+    echo "<h${level}>$(html::special "$text")</h${level}>"
+}
+
+html::make_quote () {
+    local -r quote="${1/> }"
+    echo "<pre>$(html::special "$quote")</pre>"
+}
+
+html::make_img () {
+    local link="$1"; shift
+    local descr="$1"; shift
+
+    if [ -z "$descr" ]; then
+        echo -n "<a href=\"$link\"><img src=\"$link\" /></a>"
+    else
+        echo -n "<i>$descr:</i>"
+        echo -n "<a href=\"$link\"><img alt=\"$descr\" title=\"$descr\" src=\"$link\" /></a>"
+    fi
+
+    echo "<br />"
+}
+
+html::make_link () {
+    local link="$1"; shift
+    local descr="$1"; shift
+
+    grep -F -q '://' <<< "$link" || link=${link/.gmi/.html}
+    test -z "$descr" && descr="$link"
+    echo "<a class=\"textlink\" href=\"$link\">$descr</a><br />"
+}
+
+html::fromgmi () {
+    local -r gmi_file=$1
+    local -i is_list=0
+    local -i is_plain=0
+
+    while IFS='' read -r line; do
+        if [ $is_list -eq 1 ]; then
+            if [[ "$line" == '* '* ]]; then
+                echo "<li>${line/\* /}</li>"
+            else
+                is_list=0
+                echo "</ul>"
+            fi
+            continue
+
+        elif [ $is_plain -eq 1 ]; then
+            if [[ "$line" == '```'* ]]; then
+                echo "</pre>"
+                is_plain=0
+            else
+                html::special "$line"
+            fi
+            continue
+        fi
+
+        case "$line" in
+            '* '*)
+                is_list=1
+                echo "<ul>"
+                echo "<li>${line/\* /}</li>"
+                ;;
+            '```'*)
+                is_plain=1
+                echo "<pre>"
+                ;;
+            '# '*)
+                html::make_heading "$line" 1
+                ;;
+            '## '*)
+                html::make_heading "$line" 2
+                ;;
+            '### '*)
+                html::make_heading "$line" 3
+                ;;
+            '> '*)
+                html::make_quote "$line"
+                ;;
+            '=> '*)
+                generate::make_link html "$line"
+                ;;
+            *)
+                html::make_paragraph "$line"
+                ;;
+        esac
+    done
+}
+
+html::test () {
+    local line='Hello world! This is a paragraph.'
+    assert::equals "$(html::make_paragraph "$line")" '<p>Hello world! This is a paragraph.</p>'
+
+    line=''
+    assert::equals "$(html::make_paragraph "$line")" ''
+
+    line='Foo &<>& Bar!'
+    assert::equals "$(html::make_paragraph "$line")" '<p>Foo &amp;&lt;&gt;&amp; Bar!</p>'
+
+    line='# Header 1'
+    assert::equals "$(html::make_heading "$line" 1)" '<h1>Header 1</h1>'
+
+    line='## Header 2'
+    assert::equals "$(html::make_heading "$line" 2)" '<h2>Header 2</h2>'
+
+    line='### Header 3'
+    assert::equals "$(html::make_heading "$line" 3)" '<h3>Header 3</h3>'
+
+    line='> This is a quote'
+    assert::equals "$(html::make_quote "$line")" '<pre>This is a quote</pre>'
+
+    line='=> https://example.org'
+    assert::equals "$(generate::make_link html "$line")" \
+        '<a class="textlink" href="https://example.org">https://example.org</a><br />'
+
+    line='=> index.gmi'
+    assert::equals "$(generate::make_link html "$line")" \
+        '<a class="textlink" href="index.html">index.html</a><br />'
+
+    line='=> http://example.org Description of the link'
+    assert::equals "$(generate::make_link html "$line")" \
+        '<a class="textlink" href="http://example.org">Description of the link</a><br />'
+
+    line='=> http://example.org/image.png'
+    assert::equals "$(generate::make_link html "$line")" \
+        '<a href="http://example.org/image.png"><img src="http://example.org/image.png" /></a><br />'
+
+    line='=> http://example.org/image.png Image description'
+    assert::equals "$(generate::make_link html "$line")" \
+        '<i>Image description:</i><a href="http://example.org/image.png"><img alt="Image description" title="Image description" src="http://example.org/image.png" /></a><br />'
+}
-- 
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