Make variables accessible from content files

4 files changed, 67 insertions, 53 deletions

diff --git a/filters/code.lua b/filters/code.lua
new file mode 100644
index 0000000..aca3ce8
--- /dev/null
+++ b/filters/code.lua
@@ -0,0 +1,13 @@
+function CodeBlock(el)
+    if el.classes[1] == "plain" then
+        el = pandoc.Div({ el }, { class = 's-code' })
+    elseif el.classes[1] then
+        local formatted = pandoc.pipe('pygmentize', {
+            '-l', el.classes[1], '-f', 'html', '-O', 'cssclass=s-code s-code--highlight',
+        }, el.text)
+
+        if formatted then el = pandoc.RawBlock('html', formatted) end
+    end
+
+    return el
+end
diff --git a/filters/common_actions.lua b/filters/common_actions.lua
deleted file mode 100644
index cfe2d58..0000000
--- a/filters/common_actions.lua
+++ /dev/null
@@ -1,53 +0,0 @@
-function CodeBlock(el)
-    if el.classes[1] == "plain" then
-        el = pandoc.Div({ el }, { class = 's-code' })
-    elseif el.classes[1] then
-        local formatted = pandoc.pipe('pygmentize', {
-            '-l', el.classes[1], '-f', 'html', '-O', 'cssclass=s-code s-code--highlight',
-        }, el.text)
-
-        if formatted then el = pandoc.RawBlock('html', formatted) end
-    end
-
-    return el
-end
-
-function Header(el)
-    if el.level == 1 then
-        local newchildren = pandoc.List()
-        newchildren:insert(pandoc.Span(el.content, { class = 's-headlines__title-inner' }))
-        el.content = newchildren
-    end
-
-    if el.level <= 3 and el.identifier ~= '' then
-        el.content:insert(pandoc.Space())
-        el.content:insert(pandoc.Link(pandoc.RawInline('html',
-            '<svg class="o-icon" width="1em" height="1em"><use href="/symbols.svg#icon-link"></use></svg>'),
-            '#' .. el.identifier, nil, { class = 's-headlines__link' }))
-    end
-
-    return el
-end
-
-function Div(el)
-    if el.attributes.macro == nil then return el end
-
-    if el.attributes.macro == 'refs' and el.content[1].tag == 'BulletList' then
-        local newchildren = pandoc.List()
-
-        newchildren:insert(pandoc.RawBlock('html', '<ul>'))
-
-        for _, children in ipairs(el.content[1].content) do
-            newchildren:insert(pandoc.RawBlock('html',
-                '<li class="c-page__prefixed c-page__prefixed--ref">'))
-            newchildren:extend(children)
-            newchildren:insert(pandoc.RawBlock('html', '</li>'))
-        end
-
-        newchildren:insert(pandoc.RawBlock('html', '</ul>'))
-
-        el.content = newchildren
-    end
-
-    return el.content
-end
diff --git a/filters/headers.lua b/filters/headers.lua
new file mode 100644
index 0000000..4e3a689
--- /dev/null
+++ b/filters/headers.lua
@@ -0,0 +1,16 @@
+function Header(el)
+    if el.level == 1 then
+        local newchildren = pandoc.List()
+        newchildren:insert(pandoc.Span(el.content, { class = 's-headlines__title-inner' }))
+        el.content = newchildren
+    end
+
+    if el.level <= 3 and el.identifier ~= '' then
+        el.content:insert(pandoc.Space())
+        el.content:insert(pandoc.Link(pandoc.RawInline('html',
+            '<svg class="o-icon" width="1em" height="1em"><use href="/symbols.svg#icon-link"></use></svg>'),
+            '#' .. el.identifier, nil, { class = 's-headlines__link' }))
+    end
+
+    return el
+end
diff --git a/filters/vars.lua b/filters/vars.lua
new file mode 100644
index 0000000..e60019e
--- /dev/null
+++ b/filters/vars.lua
@@ -0,0 +1,38 @@
+local vars = {}
+
+function string.split(str, sep)
+    sep = sep or '%s'
+
+    local parts = pandoc.List()
+
+    for field, s in str:gmatch("([^" .. sep .. "]*)(" .. sep .. "?)") do
+        parts:insert(field)
+        if s == "" then return parts end
+    end
+end
+
+function meta(meta) vars = meta end
+
+function str(el)
+    local prefix, varref, suffix = el.text:match('^(.*)%%(.*)%%(.*)$')
+
+    if varref then
+        local parts = varref:split(".")
+        local var = vars
+
+        for i = 1, #parts do
+            local part = parts[i]
+            local v = var[part]
+
+            if not v then return el end
+
+            var = v
+        end
+
+        if var then return pandoc.Str(prefix .. var .. suffix) end
+    end
+
+    return el
+end
+
+return { { Meta = meta }, { Str = str } }