nvim: add stale

1 files changed, 159 insertions, 0 deletions

diff --git a/.config/nvim/lua/stale.lua b/.config/nvim/lua/stale.lua
new file mode 100644
index 0000000..0c79884
--- /dev/null
+++ b/.config/nvim/lua/stale.lua
@@ -0,0 +1,159 @@
+local M = {}
+_VT_NS = vim.api.nvim_create_namespace("lsp_signature")
+
+local prescript
+local prescript_hi
+local due_hi
+local ft
+local future
+local future_hi
+local date_hi
+local pattern_start
+local pattern_end
+
+local use_clock_time
+local default_due_time
+
+-- local date_pattern
+local datetime_pattern
+local datetime_pattern_match
+
+local function parseDue(due)
+    local year = 31556926
+    local month = 2629743
+    local week = 604800
+    local day = 86400
+    local hour = 3600
+    local minute = 60
+    local res = ''
+
+    if due >= year then
+        res = res .. math.floor(due / year) .. 'y '
+        due = due % year
+    end
+
+    if due >= month then
+        res = res .. math.floor(due / month) .. 'm '
+        due = due % month
+    end
+
+    if due >= week then
+        res = res .. math.floor(due / week) .. 'w '
+        due = due % week
+    end
+
+    if use_clock_time == true then
+        if due >= day then
+            res = res .. math.floor(due / day) .. 'd '
+            due = due % day
+        end
+
+        if due >= hour then
+            res = res .. math.floor(due / hour) .. 'h '
+            due = due % hour
+        end
+
+        if due >= minute then
+            res = res .. math.floor(due / minute) .. 'min '
+            due = due % minute
+        end
+    else
+        res = res .. math.floor(due / day) + 1 .. 'd '
+    end
+
+    return res
+end
+
+function M.setup(c)
+    use_clock_time = c.use_clock_time or true
+    default_due_time = c.default_due_time or 'midnight'
+    prescript = c.prescript or 'has been: '
+    prescript_hi = c.prescript_hi or 'Comment'
+    due_hi = c.due_hi or 'String'
+    ft = c.ft or '*.wiki'
+    future = c.future or 'future'
+    future_hi = c.future_hi or 'Error'
+    date_hi = c.date_hi or 'Conceal'
+    pattern_start = c.pattern_start or '('
+    pattern_end = c.pattern_end or ')'
+
+    local lua_start = pattern_start:gsub("[%(%)%.%%%+%-%*%?%[%^%$%]]", "%%%1")
+    local lua_end = pattern_end:gsub("[%(%)%.%%%+%-%*%?%[%^%$%]]", "%%%1")
+
+    local regex_start = pattern_start:gsub("\\%^%$%.%*~%[%]&", "\\%1")
+    local regex_end = pattern_end:gsub("\\%^%$%.%*~%[%]&", "\\%1")
+
+    datetime_pattern = lua_start .. '%d%d%d%d%-%d%d%-%d%d %d%d:%d%d' .. lua_end
+    datetime_pattern_match = lua_start .. '(%d%d%d%d)%-(%d%d)%-(%d%d) (%d%d):(%d%d)' .. lua_end
+
+    local regex_hi = '/' .. regex_start .. '\\d*-*\\d\\+-\\d\\+' .. regex_end ..
+        '/'
+
+    vim.api.nvim_command('autocmd BufEnter ' .. ft ..
+        ' lua require("stale").draw(0)')
+    vim.api.nvim_command('autocmd InsertLeave ' .. ft ..
+        ' lua require("stale").redraw(0)')
+    vim.api.nvim_command('autocmd TextChanged ' .. ft ..
+        ' lua require("stale").redraw(0)')
+    vim.api.nvim_command('autocmd TextChangedI ' .. ft ..
+        ' lua require("stale").redraw(0)')
+
+    vim.api.nvim_command('autocmd BufEnter ' .. ft .. ' syn match DueDate ' ..
+        regex_hi ..
+        ' display containedin=mkdNonListItemBlock,mkdListItemLine,mkdBlockquote contained')
+    vim.api.nvim_command('autocmd BufEnter ' .. ft .. ' hi def link DueDate ' ..
+        date_hi)
+end
+
+function M.draw(buf)
+    local user_time
+    local user_hour
+    local user_min
+    local user_sec = 00
+
+    -- get current time
+    local now = os.time(os.date('*t'))
+
+    -- find which date pattern is being passed in by user
+    for key, value in pairs(vim.api.nvim_buf_get_lines(buf, 0, -1, {})) do
+        local dateTime = string.match(value, datetime_pattern)
+        local due
+
+        if dateTime then
+            local cur_year, month, day, user_hour, user_min = dateTime:match(datetime_pattern_match)
+            user_time = os.time({
+                year = cur_year,
+                month = month,
+                day = day,
+                hour = user_hour,
+                min = user_min,
+                sec = user_sec
+            })
+
+            due = now - user_time
+        end
+
+        if due then
+            local parsed
+
+            if due > 0 then
+                parsed = { parseDue(due), due_hi }
+            else
+                parsed = { future, future_hi }
+            end
+
+            vim.api.nvim_buf_set_virtual_text(buf, _VT_NS, key - 1, {
+                { prescript, prescript_hi }, parsed
+            }, {})
+        end
+    end
+end
+
+function M.clear(buf) vim.api.nvim_buf_clear_namespace(buf, _VT_NS, 0, -1) end
+
+function M.redraw(buf)
+    M.clear(buf)
+    M.draw(buf)
+end
+
+return M