Can check for process by name

ltnp/ltnp_operator.cr

@@ -15,4 +15,8 @@ class LtnpOperator
   def get_port_record(port : String) : LtnpRecord | Nil
     @ltnp_records.find { |r| r.port == port }
   end
+
+  def search_p_name(p_name : String) : LtnpRecord | Nil
+    @ltnp_records.find { |r| r.p_name == p_name }
+  end
 end

ltnp/ltnp_record.cr

@@ -27,6 +27,10 @@ class LtnpRecord
     ]
   end
 
+  def out_s
+    "Port: %s, Process: %s, Process ID: %s" % [self.port, self.p_name, self.pid]
+  end
+
   def ser_address_port(address_port : Array) : {String, String}
     address = String.new
     port = String.new

main.cr

@@ -20,7 +20,7 @@ OptionParser.parse do |parser|
     record = ltnp_operator.get_port_record port
 
     unless record.nil?
-      puts "Port: %s, Process: %s, Process ID: %s" % [record.port, record.p_name, record.pid]
+      puts record.out_s
     else
       puts "No processes found on port %s" % port
     end
@@ -28,12 +28,24 @@ OptionParser.parse do |parser|
     exit
   end
 
+  parser.on "-p PNAME", "--find-process=PNAME", "Find the port and ID of a process by name" do |p_name|
+    ltnp_operator = CommandRunner.run_ltnp
+    record = ltnp_operator.search_p_name p_name
+
+    unless record.nil?
+      puts record.out_s
+    else
+      puts "No process found by the name %s" % p_name
+    end
+
+  end
+
   parser.on "-k PORT", "--kill-port=PORT", "Kill process on port" do |port|
     ltnp_operator = CommandRunner.run_ltnp
     record = ltnp_operator.get_port_record port
 
     unless record.nil?
-      puts "Port: %s, Process: %s, Process ID: %s" % [record.port, record.p_name, record.pid]
+      puts record.out_s
       puts "Would you like to kill %s? (y/n)" % [record.p_name]
       input = gets
       unless input.nil?

spec/ltnp/ltnp_operator_spec.cr

@@ -16,4 +16,17 @@ describe LtnpOperator do
       sut.get_port_record(nonsense_port).nil?.should be_true
     end
   end
+
+  describe "#search_p_name" do
+    existing_p_name = "polymer"
+    nonsense_p_name = "thisisnotathing"
+
+    it "should find record when process exists" do
+      sut.search_p_name(existing_p_name).nil?.should be_false
+    end
+
+    it "should not find record when process doesn't exist" do
+      sut.search_p_name(existing_p_name).nil?.should be_false
+    end
+  end
 end