lib/oleg: add cache function, use it

controllers/projects.moon

@@ -17,24 +17,13 @@ class Projects extends lapis.Application
     @title = "Readme for #{@params.name}"
     @name = @params.name
 
-    @doc, @err = oleg.get "readmes", @params.name
+    @doc = oleg.cache "readmes", @params.name, ->
-
-    if @err
-      ngx.log ngx.NOTICE, "Need to download readme for #{@params.name}"
-
       reply, err = gh\authed_request "/repos/Xe/#{@params.name}/contents/README.md"
       readme = base64.decode reply.content
 
       if code == 404
         return render: "notfound", status_code: 404
 
-      @doc = discount readme, "toc", "nopants", "autolink"
+      discount readme, "toc", "nopants", "autolink"
-
-      oleg.set "readmes", @params.name, @doc
-      @ret = readme
-
-    elseif @err
-      @err = "OlegDB returned code #{@err}."
-      return render: "error", status_code: 500
 
     render: true

controllers/resume.moon

@@ -6,21 +6,11 @@ class Projects extends lapis.Application
   [resume: "/resume"]: =>
     @title = "Resume"
 
-    @doc, @err = oleg.get "resume", "cached"
+    @doc = oleg.cache "caches", "resume", ->
-
-    if @err
-      ngx.log ngx.NOTICE, "Need to cache resume HTML"
-
       local data
       with io.open "static/resume/min/resume.md", "r"
         data = \read "*a"
 
-      @doc = discount data, "toc", "nopants", "autolink"
+      discount data, "toc", "nopants", "autolink"
-
-      oleg.set "resume", "cached", @doc
-
-    elseif @err
-      @err = "OlegDB returned code #{@err}."
-      return render: "error", status_code: 500
 
     render: true

lib/oleg.moon

@@ -33,4 +33,13 @@ ret.delete = (tab, key) ->
 ret.set = (tab, key, value) ->
   request "POST", tab, key, value
 
+ret.cache = (tab, key, getter) ->
+  data, err = ret.get tab, key
+
+  if err
+    ngx.log ngx.NOTICE, "Caching #{tab} #{key} to olegdb..."
+    data = getter!
+    ngx.log ngx.NOTICE, "done"
+  data
+
 ret