2 files changed, 66 insertions, 0 deletions
diff --git a/src/clarktown/correctors/atx_heading_block.clj b/src/clarktown/correctors/atx_heading_block.clj
new file mode 100644
index 0000000..9ff789e
--- /dev/null
+++ b/src/clarktown/correctors/atx_heading_block.clj
@@ -0,0 +1,29 @@
+(ns clarktown.correctors.atx-heading-block
+  (:require
+    [clojure.string :as string]))
+
+
+(defn empty-line-above?
+  "Determines whether there's a need for an empty new line 
+  above the `line` at the current `index`. In the case of a 
+  ATX heading block that starts with the `#` character, if 
+  there's no empty newline above, we need to create one, and 
+  so this function must then return `true`."
+  [lines line index]
+  (and (string/starts-with? (string/trim line) "#")
+       (> index 0)
+       (not (= (-> (nth lines (- index 1))
+                   string/trim) ""))))
+
+
+(defn empty-line-below?
+  "Determines whether there's a need for an empty new line
+  below the `line` at the current `index`. In the case of a 
+  ATX heading block that starts with the `#` character, if
+  there's no empty newline below, we need to create one, and
+  so this function must then return `true`."
+  [lines line index]
+  (and (string/starts-with? (string/trim line) "#")
+       (< index (- (count lines) 1))
+       (not (= (-> (nth lines (+ index 1))
+                   string/trim) ""))))
diff --git a/src/clarktown/correctors/code_block.clj b/src/clarktown/correctors/code_block.clj
new file mode 100644
index 0000000..73989fe
--- /dev/null
+++ b/src/clarktown/correctors/code_block.clj
@@ -0,0 +1,37 @@
+(ns clarktown.correctors.code-block
+  (:require
+    [clojure.string :as string]))
+
+
+(defn empty-line-above?
+  "Determines whether there's a need for an empty new line
+  above the `line` at the current `index`. In the case of a 
+  code block, which starts with three backticks (```), if there's
+  no empty newline above, we need to create one, and so this
+  function must then return `true`."
+  [lines line index]
+  (and (string/starts-with? (string/trim line) "```")
+       (> index 0)
+       (->> (take index lines)
+            (filter #(string/starts-with? (string/trim %) "```"))
+            count
+            even?)
+       (not (= (-> (nth lines (- index 1))
+                   string/trim) ""))))
+
+
+(defn empty-line-below?
+  "Determines whether there's a need for an empty new line
+  below the `line` at the current `index`. In the case of a 
+  code block, which ends with three backticks (```), if there's
+  no empty newline above, we need to create one, and so this 
+  function must then return `true`."
+  [lines line index]
+  (and (string/starts-with? (string/trim line) "```")
+       (< index (- (count lines) 1))
+       (->> (take index lines)
+            (filter #(string/starts-with? (string/trim %) "```"))
+            count
+            odd?)
+       (not (= (-> (nth lines (+ index 1))
+                   string/trim) ""))))