From 9ea8f9dd8d8671cd5deedc6b15cc3e793bb67787 Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Fri, 15 Apr 2016 19:31:58 -0400
Subject: [PATCH] CLI: Added ::identifyFilter

---
 src/CLI.cpp | 40 ++++++++++++++++++++++++++++++++++++++++
 src/CLI.h   |  1 +
 2 files changed, 41 insertions(+)

diff --git a/src/CLI.cpp b/src/CLI.cpp
index 6d55beb9..b9ddcae3 100644
--- a/src/CLI.cpp
+++ b/src/CLI.cpp
@@ -109,6 +109,7 @@ std::string A2::dump () const
     else if (tag == "CMD")           tags += "\033[1;37;46m"           + tag + "\033[0m ";
     else if (tag == "EXT")           tags += "\033[1;37;42m"           + tag + "\033[0m ";
     else if (tag == "HINT")          tags += "\033[1;37;43m"           + tag + "\033[0m ";
+    else if (tag == "FILTER")        tags += "\033[1;37;45m"           + tag + "\033[0m ";
     else                             tags += "\033[32m"                + tag + "\033[0m ";
   }
 
@@ -227,6 +228,7 @@ void CLI::analyze ()
   handleArg0 ();
   lexArguments ();
   canonicalizeNames ();
+  identifyFilter ();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -369,6 +371,44 @@ void CLI::canonicalizeNames ()
   }
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// Locate arguments that are part of a filter.
+void CLI::identifyFilter ()
+{
+  for (auto& a : _args)
+  {
+    auto raw = a.attribute ("raw");
+
+    if (a.hasTag ("HINT"))
+      a.tag ("FILTER");
+
+    else if (a._lextype == Lexer::Type::date ||
+             a._lextype == Lexer::Type::duration)
+    {
+      a.tag ("FILTER");
+    }
+
+    else if (raw == "from"  ||
+             raw == "since" ||
+             raw == "to"    ||
+             raw == "until" ||
+             raw == "-"     ||
+             raw == "for")
+    {
+      a.tag ("FILTER");
+      a.tag ("KEYWORD");
+    }
+
+    else if (! a.hasTag ("CMD") &&
+             ! a.hasTag ("EXT") &&
+             ! a.hasTag ("BINARY"))
+    {
+      a.tag ("FILTER");
+      a.tag ("TAG");
+    }
+  }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Search for exact 'value' in _entities category.
 bool CLI::exactMatch (
diff --git a/src/CLI.h b/src/CLI.h
index 2e5c674c..a974fd4b 100644
--- a/src/CLI.h
+++ b/src/CLI.h
@@ -69,6 +69,7 @@ private:
   void handleArg0 ();
   void lexArguments ();
   void canonicalizeNames ();
+  void identifyFilter ();
   bool exactMatch (const std::string&, const std::string&) const;
 
 public: