Refactor options to separate file

Options were previously set ad-hoc in the initialize function, but
re-set and overwritten at various places.

Options now live in one central module (options.lua), where they
directly access the neovim options set, and re-access them on any run.

That means options can be changed while the plugin is running and it
will use their newer versions, without requiring any re-initialization.

lua/zettelkasten/init.lua

@@ -1,18 +1,7 @@
 local ZK = {}
 
 local ls = require 'zettelkasten.list'
-
-function ZK.init(vimapi)
-    vim = vimapi or vim
-    ZK.options = {
-        anchor_separator = vim.g["zettel_anchor_separator"] or
-            vim.b["zettel_anchor_separator"] or "_",
-        zettel_extension = vim.g["zettel_extension"] or
-            vim.b["zettel_extension"] or ".md"
-        -- zettel_root = vim.g["zettel_root"] or vim.b["zettel_root"] or "~/documents/notes",
-        -- TODO zettel_anchor_pattern = regex? -> needs custom creation function in `create_anchor`
-    }
-end
+local o = require 'zettelkasten.options'
 
 -- entrypoint for pressing the zettel key when the cursor
 -- is either on an existing link  (it will then
@@ -42,15 +31,13 @@ end
 -- and the text cleaned up to be useful in a link.
 function ZK.create_link(text, date)
     text = text or ""
-    local o = ZK.options
     if text == "" then
         text = "" .. ZK.create_anchor(date)
     else
         text = text:lower():gsub(" ", "-")
-        text = "" .. ZK.create_anchor(date) .. (o.anchor_separator or "_") ..
-                   text
+        text = "" .. ZK.create_anchor(date) .. o.anchor().separator .. text
     end
-    return text .. (o.zettel_extension or ".md")
+    return text .. o.zettel().extension
 end
 
 -- Returns all zettel in path as a
@@ -62,7 +49,6 @@ function ZK.get_zettel_list(path, recursive)
 end
 
 return {
-    init = ZK.init,
     zettel_link_create = ZK.zettel_link_create,
     create_anchor = ZK.create_anchor,
     create_link = ZK.create_link,

lua/zettelkasten/init_spec.lua

@@ -2,7 +2,8 @@ ZK = require 'zettelkasten.init'
 Test_date = {year = 2019, month = 10, day = 29, hour = 16, min = 45}
 
 describe("Zettelkasten", function()
-    before_each(function() ZK.init({g = {}, b = {}}) end)
+    before_each(function() _G.vim = {g = {}, b = {}} end)
+    after_each(function() _G.vim = nil end)
 
     describe("anchor creation", function()
         it("should return zettel anchor from time passed in", function()
@@ -42,21 +43,29 @@ describe("Zettelkasten", function()
                         ZK.create_link("yes indeed a space", Test_date))
         end)
 
-        it(
-            "should place the contents of g:zettel_anchor_separator variable in link",
+        it("should add contents of g:zettel_anchor_separator variable to link",
            function()
-                vim = {g = {zettel_anchor_separator = "SEP"}, b = {}}
-                ZK.init(vim)
+            vim.g.zettel_anchor_separator = "SEP"
             assert.same("1910291645SEParated.md",
                         ZK.create_link("arated", Test_date))
         end)
+        it("should add contents of b:zettel_anchor_separator variable to link",
+           function()
+            vim.b.zettel_anchor_separator = "---"
+            assert.same("1910291645---arated.md",
+                        ZK.create_link("arated", Test_date))
+        end)
 
         it("should append the filetype set in g:zettel_extension", function()
-            vim = {g = {zettel_extension = ".something"}, b = {}}
-            ZK.init(vim)
+            vim.g.zettel_extension = ".something"
             assert.same("1910291645_theworld.something",
                         ZK.create_link("theworld", Test_date))
         end)
+        it("should append the filetype set in b:zettel_extension", function()
+            vim.b.zettel_extension = ".somethingelse"
+            assert.same("1910291645_theworld.somethingelse",
+                        ZK.create_link("theworld", Test_date))
+        end)
     end)
 
 end)

lua/zettelkasten/list.lua

@@ -35,8 +35,11 @@ end
 -- Take a list of zettel as an optional variable, without which
 -- it will use the (recursive) results of the zettel_root directory.
 function ls.get_zettel(anchor, all)
+    if not all then all = ls.get_anchors_and_paths('somepath') end
+
     return all[anchor]
 end
 
+function ls.open_zettel(anchor, all) end
 
 return ls

lua/zettelkasten/list_spec.lua

@@ -1,4 +1,4 @@
-ls = require'zettelkasten.list'
+local ls = require 'zettelkasten.list'
 -- these tests, I suppose, only work on unix due to the file structure
 
 local function simple_api_mock(files)
@@ -13,20 +13,14 @@ local function simple_api_mock(files)
                     return true
                 end
             end,
-            fs_scandir_next = function()
-                return table.remove(files)
-            end
+            fs_scandir_next = function() return table.remove(files) end
         }
     }
 end
 
 describe("get_anchors_and_paths", function()
-    before_each(function()
-        get_api_mock = simple_api_mock
-    end)
-    after_each(function()
-        _G.vim = nil
-    end)
+    before_each(function() get_api_mock = simple_api_mock end)
+    after_each(function() _G.vim = nil end)
 
     it("should return anchor-keyed table pointing to filename of zettel",
        function()
@@ -136,19 +130,37 @@ describe("get_anchors_and_paths", function()
             ["2345678901"] = "2345678901 another.wiki"
         }
 
-        assert.same(expected, ls.get_anchors_and_paths('mydirectory', false, vim.g))
+        assert.same(expected,
+                    ls.get_anchors_and_paths('mydirectory', false, vim.g))
 
     end)
+
+    it("should default to the zettel root dir",
+       function() pending("not implemented") end)
 end)
 
 describe("get_zettel", function()
     it("should return the correct zettel by id", function()
         local file_list = {
             ["1910291645"] = "1910291645 myfile.md",
-            ["2345678901"] = "2345678901 another.md",
+            ["2345678901"] = "2345678901 another.md"
         }
         _G.vim = simple_api_mock(file_list)
 
-        assert.same("1910291645 myfile.md", ls.get_zettel("1910291645", file_list))
+        assert.same("1910291645 myfile.md",
+                    ls.get_zettel("1910291645", file_list))
+    end)
+
+    it("should default to the zettel root dir if no list passed in", function()
+        local file_list = {"1910291645 myfile.wiki", "2345678901 another.wiki"}
+        _G.vim = simple_api_mock(file_list)
+
+        pending("not implemented")
+        assert.same("1910291645 myfile.wiki", ls.get_zettel("1910291645"))
     end)
 end)
+
+describe("open_zettel", function()
+    it("should set the current buffer to the zettel passed in as anchor",
+       function() pending("not implemented") end)
+end)

lua/zettelkasten/options.lua

@@ -0,0 +1,24 @@
+local Opt = {}
+
+-- setting defaults
+local ZETTEL_EXTENSION = ".md"
+local ANCHOR_SEPARATOR = "_"
+-- TODO zettel_root = vim.g["zettel_root"] or vim.b["zettel_root"] or "~/documents/notes",
+-- TODO zettel_anchor_pattern = regex? -> needs custom creation function in `create_anchor`
+
+function Opt.zettel()
+    local options = {}
+    options.extension =
+        vim.g["zettel_extension"] or vim.b["zettel_extension"] or
+            ZETTEL_EXTENSION
+    return options
+end
+
+function Opt.anchor()
+    local options = {}
+    options.separator = vim.g["zettel_anchor_separator"] or
+                            vim.b["zettel_anchor_separator"] or ANCHOR_SEPARATOR
+    return options
+end
+
+return Opt

lua/zettelkasten/options_spec.lua

@@ -0,0 +1,31 @@
+local opt = require 'zettelkasten.options'
+
+before_each(function() _G.vim = {g = {}, b = {}} end)
+after_each(function() _G.vim = nil end)
+
+describe("zettel options", function()
+
+    it("should return the global zettel extension if set in vim", function()
+        _G.vim.g.zettel_extension = ".myextension"
+        assert.same(".myextension", opt.zettel().extension)
+    end)
+    it("should return the buffer zettel extension if set in vim", function()
+        _G.vim.b.zettel_extension = ".mybufextension"
+        assert.same(".mybufextension", opt.zettel().extension)
+    end)
+    it("should return the default zettel extension if not set in vim",
+       function() assert.same(".md", opt.zettel().extension) end)
+end)
+
+describe("zettel options", function()
+    it("should return the global anchor separator if set in vim", function()
+        _G.vim.g.zettel_anchor_separator = "SEPARATE"
+        assert.same("SEPARATE", opt.anchor().separator)
+    end)
+    it("should return the buffer anchor separator if set in vim", function()
+        _G.vim.b.zettel_anchor_separator = "--"
+        assert.same("--", opt.anchor().separator)
+    end)
+    it("should return the default anchor separator if not set in vim",
+       function() assert.same("_", opt.anchor().separator) end)
+end)