From ac027192285ad741b3ac1b837e1c363beb8f3791 Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Sun, 14 Nov 2021 09:28:25 +0100
Subject: Generate special list metadata

---
 scripts/metadata_filter.lua | 96 +++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 88 insertions(+), 8 deletions(-)

(limited to 'scripts')

diff --git a/scripts/metadata_filter.lua b/scripts/metadata_filter.lua
index ebd69f1..b16d472 100644
--- a/scripts/metadata_filter.lua
+++ b/scripts/metadata_filter.lua
@@ -1,5 +1,14 @@
 local path = require 'pandoc.path'
 
+function pandoc.List:flatMap(fn)
+    local mapped = self:map(fn)
+    local result = pandoc.List()
+
+    for i = 1, #mapped do result:extend(mapped[i]) end
+
+    return result
+end
+
 function format_date(date)
     if not date then return date end
 
@@ -49,14 +58,12 @@ function resolve_url(site_url, ref_file, target_file)
 end
 
 function resolve_layout(depth)
-    local layout = "deep_categorized_list"
+    local layout = "categorized_list"
 
     if depth == "0" then
         layout = "page"
     elseif depth == "1" then
         layout = "list"
-    elseif depth == "2" then
-        layout = "categorized_list"
     end
 
     return layout
@@ -91,14 +98,14 @@ function prep_menu(active_id, main_menu)
     return { items = items, active = active_item }
 end
 
-function process_pages(global, order, pages_by_id)
+function process_pages(global, parent, order, pages_by_id)
     if not pages_by_id then return nil end
 
     local pages_all = pandoc.List()
     local pages_date_desc = pandoc.List()
 
     for _, page in pairs(pages_by_id) do
-        local p = process(global, page)
+        local p = process(global, parent, page)
         if not p.unlisted then
             pages_all:insert(p)
             if p.date then pages_date_desc:insert(p) end
@@ -176,7 +183,77 @@ function find_depth(pages)
     return tostring(depth)
 end
 
-function process(global, meta)
+function generate_list(meta)
+    if meta.depth == "1" then
+        return meta.pages.all:map(function(p)
+            return {
+                title = p.title,
+                subtitle = p.subtitle,
+                date = p.date,
+                url = p.url,
+                icon = p.icon or meta.icon,
+                post_icon = meta.list_post_icon,
+                indicator = meta.list_read_indicators,
+            }
+        end)
+    elseif meta.depth == "2" then
+        return meta.pages.all:map(function(cat)
+            return {
+                title = cat.title,
+                content = pandoc.utils.stringify(cat.content),
+                url = cat.url,
+                grid = cat.list_grid,
+                items = cat.pages.all:map(function(p)
+                    return {
+                        title = p.title,
+                        subtitle = p.subtitle,
+                        date = p.date,
+                        url = p.url,
+                        icon = p.icon or cat.icon,
+                        post_icon = cat.list_post_icon or meta.list_post_icon,
+                        indicator = cat.list_read_indicators,
+                    }
+                end),
+            }
+        end)
+    elseif meta.depth == "3" then
+        return meta.pages.all:map(function(cat)
+            return {
+                title = cat.title,
+                content = pandoc.utils.stringify(cat.content),
+                url = cat.url,
+                grid = cat.list_grid,
+                items = cat.pages.all:flatMap(function(c)
+                    if c.pages then
+                        return c.pages.all:map(function(p)
+                            return {
+                                title = p.title,
+                                subtitle = p.subtitle or c.title,
+                                url = p.url,
+                                icon = p.icon or c.icon,
+                                post_icon = c.list_post_icon or cat.list_post_icon,
+                                indicator = c.list_read_indicators,
+                            }
+                        end)
+                    else
+                        local l = pandoc.List()
+                        l:insert({
+                            title = c.title,
+                            subtitle = c.subtitle,
+                            url = c.url,
+                            icon = c.icon or meta.icon,
+                            post_icon = meta.list_post_icon,
+                            indicator = meta.list_read_indicators,
+                        })
+                        return l
+                    end
+                end),
+            }
+        end)
+    end
+end
+
+function process(global, parent, meta)
     meta.namespace = resolve_namespace(meta.namespace)
     meta.file_out = pandoc.utils.stringify(meta.file_out):gsub("^out", "")
     meta.url = meta.url and pandoc.utils.stringify(meta.url)
@@ -209,7 +286,8 @@ function process(global, meta)
         meta.menus.main = prep_menu(meta.namespace.root.id, meta.menus.main)
     end
 
-    meta.pages = process_pages(global, meta.list_order, meta.pages)
+    meta.pages =
+        process_pages(global, { parent = parent, meta = meta }, meta.list_order, meta.pages)
     meta.depth = (meta.pages and find_depth(meta.pages.all)) or "0"
     meta.layout = prep_layout(meta.layout or resolve_layout(meta.depth))
 
@@ -227,11 +305,13 @@ function process(global, meta)
         meta.last_update = meta.date
     end
 
+    meta.list = generate_list(meta)
+
     return meta
 end
 
 function Meta(meta)
     meta.site.url = pandoc.utils.stringify(meta.site.url):gsub("/$", "")
 
-    return process(meta, meta)
+    return process(meta, nil, meta)
 end
-- 
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