Added Caper (0.2.0-master) and Logr (0.2.1) libraries

2013-09-30 18:40:27 +13:00
parent 8acdc56df1
commit ab51707607
13 changed files with 1531 additions and 0 deletions
@@ -0,0 +1,147 @@
+# Copyright 2013 Dean Gardiner <gardiner91@gmail.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+from logr import Logr
+from caper.helpers import clean_dict
+from caper.result import CaperFragmentNode
+from caper.step import CaptureStep
+from caper.constraint import CaptureConstraint
+
+
+class CaptureGroup(object):
+    def __init__(self, parser, result):
+        """Capture group object
+
+        :type parser: caper.parsers.base.Parser
+        :type result: caper.result.CaperResult
+        """
+
+        self.parser = parser
+        self.result = result
+
+        #: @type: list of CaptureStep
+        self.steps = []
+        #: @type: list of CaptureConstraint
+        self.constraints = []
+
+    def capture_fragment(self, tag, regex=None, func=None, single=True):
+        Logr.debug('capture_fragment("%s", "%s", %s, %s)', tag, regex, func, single)
+
+        self.steps.append(CaptureStep(
+            self, tag,
+            'fragment',
+            regex=regex,
+            func=func,
+            single=single
+        ))
+
+        return self
+
+    def capture_closure(self, tag, regex=None, func=None, single=True):
+        Logr.debug('capture_closure("%s", "%s", %s, %s)', tag, regex, func, single)
+
+        self.steps.append(CaptureStep(
+            self, tag,
+            'closure',
+            regex=regex,
+            func=func,
+            single=single
+        ))
+
+        return self
+
+    def until(self, **kwargs):
+        self.constraints.append(CaptureConstraint(self, **kwargs))
+
+        return self
+
+    def parse_subject(self, parent_head, subject):
+        parent_node = parent_head[0] if type(parent_head) is list else parent_head
+
+        # TODO - if subject is a closure?
+
+        nodes = []
+
+        # Check constraints
+        for constraint in self.constraints:
+            weight, success = constraint.execute(subject)
+            if success:
+                Logr.debug('capturing broke on "%s" at %s', subject.value, constraint)
+                parent_node.finished_groups.append(self)
+                nodes.append(parent_head)
+
+                if weight == 1.0:
+                    return nodes
+                else:
+                    Logr.debug('Branching result')
+
+        # Try match subject against the steps available
+        tag, success, weight, match, num_fragments = (None, None, None, None, None)
+        for step in self.steps:
+            tag = step.tag
+            success, weight, match, num_fragments = step.execute(subject)
+            if success:
+                match = clean_dict(match) if type(match) is dict else match
+                Logr.debug('Found match with weight %s, match: %s, num_fragments: %s' % (weight, match, num_fragments))
+                break
+
+        Logr.debug('created fragment node with subject.value: "%s"' % subject.value)
+
+        result = [CaperFragmentNode(parent_node.closure, subject.take_right(num_fragments), parent_head, tag, weight, match)]
+
+        if match and weight < 1.0:
+            if num_fragments == 1:
+                result.append(CaperFragmentNode(parent_node.closure, [subject], parent_head, None, None, None))
+            else:
+                nodes.append(CaperFragmentNode(parent_node.closure, [subject], parent_head, None, None, None))
+
+        nodes.append(result[0] if len(result) == 1 else result)
+
+        return nodes
+
+    def execute(self):
+        heads_finished = None
+
+        while heads_finished is None or not (len(heads_finished) == len(self.result.heads) and all(heads_finished)):
+            heads_finished = []
+
+            heads = self.result.heads
+            self.result.heads = []
+
+            for head in heads:
+                node = head[0] if type(head) is list else head
+
+                Logr.debug("head node: %s" % node)
+
+                if self in node.finished_groups:
+                    Logr.debug("head finished for group")
+                    self.result.heads.append(head)
+                    heads_finished.append(True)
+                    continue
+
+                next_subject = node.next()
+
+                if next_subject:
+                    for node_result in self.parse_subject(head, next_subject):
+                        self.result.heads.append(node_result)
+
+                heads_finished.append(self in node.finished_groups or next_subject is None)
+
+            if len(self.result.heads) == 0:
+                self.result.heads = heads
+
+            Logr.debug("heads_finished: %s, self.result.heads: %s", heads_finished, self.result.heads)
+
+        Logr.debug("group finished")