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function format_date(date)
if date == nil then
return date
end
date = pandoc.utils.normalize_date(pandoc.utils.stringify(date))
local year, month, day = date:match("(%d%d%d%d)-(%d%d)-(%d%d)")
if year == nil then
return nil
end
local time = os.time({
year = tonumber(year),
month = tonumber(month),
day = tonumber(day)
})
return pandoc.MetaMap({
yyyy_mm_dd = pandoc.MetaString(os.date("%F", time)),
yyyy = pandoc.MetaString(os.date("%Y", time)),
mm_dd = pandoc.MetaString(os.date("%m-%d", time)),
rfc3339 = pandoc.MetaString(os.date("%FT%T+00:00", time))
})
end
function table_to_list(t, cmp)
local l = pandoc.MetaList({})
for key, value in pairs(t) do
l:insert(pandoc.MetaMap({
key = key,
value = value
}))
end
l:sort(cmp or function(i1, i2)
return i1.key < i2.key
end)
return l
end
function splitstr(input, sep)
sep = sep or "%s"
local t = {}
for str in input:gmatch("([^" .. sep .. "]+)") do
table.insert(t, str)
end
return t
end
function relative_to(dir, target)
dir = splitstr(dir, "/")
target = splitstr(target, "/")
local prefix = true
local path = ""
for i = 1, math.min(#dir, #target) do
local t = target[i]
if prefix then
if dir[i] ~= t then
prefix = false
path = "../" .. t
end
else
path = "../" .. path .. "/" .. t
end
end
if #dir < #target then
for i = #dir + 1, #target do
path = path .. (path == "" and "" or "/") .. target[i]
end
elseif #dir > #target then
for i = #target + 1, #dir do
path = "../" .. path
end
end
return path
end
function resolve_url(page_type, site_url, content_dir, base_dir, cur_file)
if page_type == "page" then
cur_file = cur_file:gsub("%.md$", ".html")
elseif page_type == "feed" then
cur_file = cur_file:gsub("%.md$", ".xml")
end
local abs = cur_file:gsub("^" .. content_dir, ""):gsub("/index.html$", "/")
local rel = relative_to(base_dir, cur_file):gsub("/index.html$", "/")
return pandoc.MetaMap({
abs = pandoc.MetaString(abs),
rel = pandoc.MetaString(rel),
full = pandoc.MetaString(site_url .. abs)
})
end
function resolve_section(abs_url)
local section = abs_url:match("^/(.-)[/.]") or "index"
return pandoc.MetaMap({
id = pandoc.MetaString(section),
["is_" .. section] = pandoc.MetaBool(true)
})
end
function organize_subpages(site_url, content_dir, base_dir, pages, categories)
local categories_data = pandoc.MetaList({})
pages:sort(function(p1, p2)
if p1.date and p2.date then
return pandoc.utils.stringify(p1.date.yyyy_mm_dd) > pandoc.utils.stringify(p2.date.yyyy_mm_dd)
elseif p2.date then
return true
elseif p1.date then
return false
else
return pandoc.utils.stringify(p1.title) < pandoc.utils.stringify(p2.title)
end
end)
local pages_data = pandoc.MetaMap({
all = pages,
by_year = pandoc.MetaList({}),
last_update = nil
})
if pages then
local pages_by_year_map = {}
local categories_map = {}
for i = 1, #pages do
local page = pages[i]
if page.date then
local yyyy = pandoc.utils.stringify(page.date.yyyy)
local pages_by_yyyy = pages_by_year_map[yyyy]
if not pages_by_yyyy then
pages_by_yyyy = pandoc.MetaList(pandoc.List())
pages_by_year_map[yyyy] = pages_by_yyyy
end
pages_by_yyyy:insert(page)
end
if page.category and categories then
local category = pandoc.utils.stringify(page.category)
if categories[category] then
local current_category = categories_map[category]
if not current_category then
current_category = pandoc.MetaMap({
name = pandoc.MetaString(categories[category]),
count = 0
})
categories_map[category] = current_category
end
current_category.count = current_category.count + 1
end
end
end
pages_data.by_year = table_to_list(pages_by_year_map, function(i1, i2)
return i1.key > i2.key
end)
categories_data = table_to_list(categories_map)
for _, item in ipairs(categories_data) do
item.value.count = pandoc.MetaString(("%d"):format(item.value.count))
end
if #pages_data.by_year ~= 0 then
pages_data.last_update = pages_data.by_year[1].value[1].last_update
end
end
return pages_data, categories_data
end
function Meta(meta)
meta.content_dir = meta.content_dir:gsub("/$", "")
meta.site.url = pandoc.utils.stringify(meta.site.url):gsub("/$", "")
meta.base_dir = meta.base_file:gsub("^(.*)/.-$", "%1")
meta.type = meta.type or "page"
meta.date = format_date(meta.date)
if meta.last_update ~= nil then
meta.last_update = format_date(meta.last_update)
else
meta.last_update = meta.date
end
if meta.type == "feed" then
meta.page = pandoc.MetaMap({
url = resolve_url("page", meta.site.url, meta.content_dir, meta.base_dir, meta.file)
})
end
meta.url = resolve_url(meta.type, meta.site.url, meta.content_dir, meta.base_dir, meta.file)
meta.section = resolve_section(meta.url.abs)
meta.categories = meta.categories[meta.section.id]
if meta.menus and meta.menus.main then
for i = 1, #meta.menus.main do
local item = meta.menus.main[i]
item.active = pandoc.MetaBool(pandoc.utils.stringify(item.id) == meta.section.id)
end
end
if meta.pages then
local pages, categories = organize_subpages(meta.site.url, meta.content_dir, meta.base_dir, meta.pages,
meta.categories)
meta.pages = pages
meta.categories = categories
else
meta.categories = nil
end
return meta
end
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