Move hint message generation to a new function

1 files changed, 41 insertions, 0 deletions

diff --git a/monkey/monkey.py b/monkey/monkey.py
index 7c8141c..b6032f7 100755
--- a/monkey/monkey.py
+++ b/monkey/monkey.py
@@ -260,3 +260,44 @@ def fix(name, code, edits, aux_code='', timeout=30, debug=False):
         total_time = time.monotonic() - start_time
 
     return '', [], total_time, n_tested
+
+# Return a list of pairs (range, message) describing edits in [path].
+def fix_hints(code, path):
+    program = list(annotate(code))
+
+    messages = []
+    for step_type, idx, a, b in path:
+        if step_type == 'add_rule':
+            msg = 'Add another rule.'
+            start = program[idx].pos
+            end = start
+        elif step_type == 'add_part':
+            msg = 'Add another goal.'
+            start = program[idx].pos
+            end = start
+        elif step_type == 'remove_part':
+            msg = 'Check this goal.'
+            start = program[idx].pos
+            end = idx + len(a) - 1
+            if program[end].type in ('COMMA', 'PERIOD', 'SEMI'):
+                end -= 1
+            end = program[end].pos + len(program[end].val)
+        elif step_type == 'change_part':
+            msg = 'Check this goal.'
+            first = 0
+            while idx+first < len(program)-1 and first < len(a) and first < len(b) and a[first] == b[first]:
+                first += 1
+            last = len(a)-1
+            while last < len(b) and last >= first and a[last] == b[last]:
+                last -= 1
+            start = program[idx+first].pos
+            end = program[idx+last].pos + len(program[idx+last].val)
+        elif step_type == 'remove_rule':
+            msg = 'Check this rule.'
+            start = program[idx].pos
+            end = program[idx + len(a) - 1].pos
+        messages.append(((start, end), msg))
+
+        program[idx:idx+len(a)] = [t.clone(pos=program[idx].pos) for t in b]
+
+    return messages