Adding RedisGraph support (#1673)

Co-authored-by: Chayim I. Kirshen <c@kirshen.com>

1 files changed, 74 insertions, 0 deletions

diff --git a/redis/commands/graph/path.py b/redis/commands/graph/path.py
new file mode 100644
index 0000000..6f2214a
--- /dev/null
+++ b/redis/commands/graph/path.py
@@ -0,0 +1,74 @@
+from .edge import Edge
+from .node import Node
+
+
+class Path:
+    def __init__(self, nodes, edges):
+        if not (isinstance(nodes, list) and isinstance(edges, list)):
+            raise TypeError("nodes and edges must be list")
+
+        self._nodes = nodes
+        self._edges = edges
+        self.append_type = Node
+
+    @classmethod
+    def new_empty_path(cls):
+        return cls([], [])
+
+    def nodes(self):
+        return self._nodes
+
+    def edges(self):
+        return self._edges
+
+    def get_node(self, index):
+        return self._nodes[index]
+
+    def get_relationship(self, index):
+        return self._edges[index]
+
+    def first_node(self):
+        return self._nodes[0]
+
+    def last_node(self):
+        return self._nodes[-1]
+
+    def edge_count(self):
+        return len(self._edges)
+
+    def nodes_count(self):
+        return len(self._nodes)
+
+    def add_node(self, node):
+        if not isinstance(node, self.append_type):
+            raise AssertionError("Add Edge before adding Node")
+        self._nodes.append(node)
+        self.append_type = Edge
+        return self
+
+    def add_edge(self, edge):
+        if not isinstance(edge, self.append_type):
+            raise AssertionError("Add Node before adding Edge")
+        self._edges.append(edge)
+        self.append_type = Node
+        return self
+
+    def __eq__(self, other):
+        return self.nodes() == other.nodes() and self.edges() == other.edges()
+
+    def __str__(self):
+        res = "<"
+        edge_count = self.edge_count()
+        for i in range(0, edge_count):
+            node_id = self.get_node(i).id
+            res += "(" + str(node_id) + ")"
+            edge = self.get_relationship(i)
+            res += (
+                "-[" + str(int(edge.id)) + "]->"
+                if edge.src_node == node_id
+                else "<-[" + str(int(edge.id)) + "]-"
+            )
+        node_id = self.get_node(edge_count).id
+        res += "(" + str(node_id) + ")"
+        res += ">"
+        return res