parsing photolysis

include/open_atmos/mechanism_configuration/validation.hpp

@@ -85,6 +85,10 @@ namespace open_atmos
       const std::string gas_phase_products = "gas-phase products";
       const std::string aerosol_phase = "aerosol phase";
 
+      // Photolysis
+      const std::string Photolysis_key = "PHOTOLYSIS";
+      const std::string scaling_factor = "scaling factor";
+
     } keys;
 
     struct Configuration
@@ -149,6 +153,12 @@ namespace open_atmos
       const std::vector<std::string> optional_keys{ keys.name, keys.reaction_probability };
     } surface;
 
+    struct Photolysis
+    {
+      const std::vector<std::string> required_keys{ keys.reactants, keys.products, keys.type, keys.gas_phase };
+      const std::vector<std::string> optional_keys{ keys.name, keys.scaling_factor };
+    } photolysis;
+
     struct Mechanism
     {
       const std::vector<std::string> required_keys{};

include/open_atmos/types.hpp

@@ -152,13 +152,30 @@ namespace open_atmos
       std::unordered_map<std::string, std::string> unknown_properties;
     };
 
+    struct Photolysis
+    {
+      /// @brief Scaling factor to apply to user-provided rate constants
+      double scaling_factor_{ 1.0 };
+      /// @brief A list of reactants
+      std::vector<ReactionComponent> reactants;
+      /// @brief A list of products
+      std::vector<ReactionComponent> products;
+      /// @brief An identifier, optional, uniqueness not enforced
+      std::string name;
+      /// @brief An identifier indicating which gas phase this reaction takes place in
+      std::string gas_phase;
+      /// @brief Unknown properties, prefixed with two underscores (__)
+      std::unordered_map<std::string, std::string> unknown_properties;
+    };
+
     struct Reactions
     {
       std::vector<types::Arrhenius> arrhenius;
       std::vector<types::Troe> troe;
       std::vector<types::Branched> branched;
       std::vector<types::Tunneling> tunneling;
       std::vector<types::Surface> surface;
+      std::vector<types::Photolysis> photolysis;
     };
 
     struct Mechanism

src/parser.cpp

@@ -762,6 +762,89 @@ namespace open_atmos
       return { status, surface };
     }
 
+    std::pair<ConfigParseStatus, types::Photolysis> ParsePhotolysis(const json& object, const std::vector<types::Species> existing_species, const std::vector<types::Phase> existing_phases)
+    {
+      ConfigParseStatus status = ConfigParseStatus::Success;
+      types::Photolysis photolysis;
+
+      status = ValidateSchema(object, validation::photolysis.required_keys, validation::photolysis.optional_keys);
+      if (status == ConfigParseStatus::Success)
+      {
+        std::vector<types::ReactionComponent> products{};
+        for (const auto& reactant : object[validation::keys.products])
+        {
+          auto product_parse = ParseReactionComponent(reactant);
+          status = product_parse.first;
+          if (status != ConfigParseStatus::Success)
+          {
+            break;
+          }
+          products.push_back(product_parse.second);
+        }
+
+        std::vector<types::ReactionComponent> reactants{};
+        for (const auto& reactant : object[validation::keys.reactants])
+        {
+          auto reactant_parse = ParseReactionComponent(reactant);
+          status = reactant_parse.first;
+          if (status != ConfigParseStatus::Success)
+          {
+            break;
+          }
+          reactants.push_back(reactant_parse.second);
+        }
+
+        if (object.contains(validation::keys.scaling_factor))
+        {
+          photolysis.scaling_factor_ = object[validation::keys.scaling_factor].get<double>();
+        }
+
+        if (object.contains(validation::keys.name))
+        {
+          photolysis.name = object[validation::keys.name].get<std::string>();
+        }
+
+        auto comments = GetComments(object, validation::photolysis.required_keys, validation::photolysis.optional_keys);
+
+        std::unordered_map<std::string, std::string> unknown_properties;
+        for (const auto& key : comments)
+        {
+          std::string val = object[key].dump();
+          unknown_properties[key] = val;
+        }
+
+        std::vector<std::string> requested_species;
+        for (const auto& spec : products)
+        {
+          requested_species.push_back(spec.species_name);
+        }
+        for (const auto& spec : reactants)
+        {
+          requested_species.push_back(spec.species_name);
+        }
+
+        if (status == ConfigParseStatus::Success && RequiresUnknownSpecies(requested_species, existing_species))
+        {
+          status = ConfigParseStatus::ReactionRequiresUnknownSpecies;
+        }
+
+        std::string gas_phase = object[validation::keys.gas_phase].get<std::string>();
+        auto it =
+            std::find_if(existing_phases.begin(), existing_phases.end(), [&gas_phase](const auto& phase) { return phase.name == gas_phase; });
+        if (status == ConfigParseStatus::Success && it == existing_phases.end())
+        {
+          status = ConfigParseStatus::UnknownPhase;
+        }
+
+        photolysis.gas_phase = gas_phase;
+        photolysis.products = products;
+        photolysis.reactants = reactants;
+        photolysis.unknown_properties = unknown_properties;
+      }
+
+      return { status, photolysis };
+    }
+
     std::pair<ConfigParseStatus, types::Reactions>
     ParseReactions(const json& objects, const std::vector<types::Species> existing_species, const std::vector<types::Phase> existing_phases)
     {
@@ -821,6 +904,16 @@ namespace open_atmos
           }
           reactions.surface.push_back(surface_parse.second);
         }
+        else if (type == validation::keys.Photolysis_key)
+        {
+          auto photolysis_parse = ParsePhotolysis(object, existing_species, existing_phases);
+          status = photolysis_parse.first;
+          if (status != ConfigParseStatus::Success)
+          {
+            break;
+          }
+          reactions.photolysis.push_back(photolysis_parse.second);
+        }
       }
 
       return { status, reactions };

test/integration/test_json_parser.cpp

@@ -16,6 +16,7 @@ TEST(JsonParser, ParsesFullConfiguration)
   EXPECT_EQ(mechanism.reactions.branched.size(), 1);
   EXPECT_EQ(mechanism.reactions.tunneling.size(), 1);
   EXPECT_EQ(mechanism.reactions.surface.size(), 1);
+  EXPECT_EQ(mechanism.reactions.photolysis.size(), 1);
 }
 
 TEST(JsonParser, ParserReportsBadFiles)

test/unit/CMakeLists.txt

@@ -13,6 +13,7 @@ create_standard_test(NAME parse_troe SOURCES test_parse_troe.cpp)
 create_standard_test(NAME parse_branched SOURCES test_parse_branched.cpp)
 create_standard_test(NAME parse_tunneling SOURCES test_parse_tunneling.cpp)
 create_standard_test(NAME parse_surface SOURCES test_parse_surface.cpp)
+create_standard_test(NAME parse_photolysis SOURCES test_parse_photolysis.cpp)
 
 ################################################################################
 # Copy test data

test/unit/test_parse_photolysis.cpp

@@ -0,0 +1,56 @@
+#include <gtest/gtest.h>
+
+#include <open_atmos/mechanism_configuration/parser.hpp>
+
+using namespace open_atmos::mechanism_configuration;
+
+TEST(JsonParser, CanParseValidPhotolysisReaction)
+{
+  JsonParser parser;
+  auto [status, mechanism] = parser.Parse(std::string("unit_configs/reactions/photolysis/valid.json"));
+  EXPECT_EQ(status, ConfigParseStatus::Success);
+
+  EXPECT_EQ(mechanism.reactions.photolysis.size(), 2);
+
+  EXPECT_EQ(mechanism.reactions.photolysis[0].gas_phase, "gas");
+  EXPECT_EQ(mechanism.reactions.photolysis[0].name, "my photolysis");
+  EXPECT_EQ(mechanism.reactions.photolysis[0].scaling_factor_, 12.3);
+  EXPECT_EQ(mechanism.reactions.photolysis[0].reactants.size(), 1);
+  EXPECT_EQ(mechanism.reactions.photolysis[0].reactants[0].species_name, "B");
+  EXPECT_EQ(mechanism.reactions.photolysis[0].reactants[0].coefficient, 1);
+  EXPECT_EQ(mechanism.reactions.photolysis[0].products.size(), 1);
+  EXPECT_EQ(mechanism.reactions.photolysis[0].products[0].species_name, "C");
+  EXPECT_EQ(mechanism.reactions.photolysis[0].products[0].coefficient, 1);
+  EXPECT_EQ(mechanism.reactions.photolysis[0].unknown_properties.size(), 1);
+  EXPECT_EQ(mechanism.reactions.photolysis[0].unknown_properties["__comment"], "\"hi\"");
+
+  EXPECT_EQ(mechanism.reactions.photolysis[1].gas_phase, "gas");
+  EXPECT_EQ(mechanism.reactions.photolysis[1].scaling_factor_, 1);
+  EXPECT_EQ(mechanism.reactions.photolysis[1].reactants.size(), 1);
+  EXPECT_EQ(mechanism.reactions.photolysis[1].reactants[0].species_name, "B");
+  EXPECT_EQ(mechanism.reactions.photolysis[1].reactants[0].coefficient, 1.2);
+  EXPECT_EQ(mechanism.reactions.photolysis[1].products.size(), 1);
+  EXPECT_EQ(mechanism.reactions.photolysis[1].products[0].species_name, "C");
+  EXPECT_EQ(mechanism.reactions.photolysis[1].products[0].coefficient, 0.2);
+}
+
+TEST(JsonParser, PhotolysisDetectsUnknownSpecies)
+{
+  JsonParser parser;
+  auto [status, mechanism] = parser.Parse(std::string("unit_configs/reactions/photolysis/unknown_species.json"));
+  EXPECT_EQ(status, ConfigParseStatus::ReactionRequiresUnknownSpecies);
+}
+
+TEST(JsonParser, PhotolysisDetectsBadReactionComponent)
+{
+  JsonParser parser;
+  auto [status, mechanism] = parser.Parse(std::string("unit_configs/reactions/photolysis/bad_reaction_component.json"));
+  EXPECT_EQ(status, ConfigParseStatus::InvalidKey);
+}
+
+TEST(JsonParser, PhotolysisDetectsUnknownPhase)
+{
+  JsonParser parser;
+  auto [status, mechanism] = parser.Parse(std::string("unit_configs/reactions/photolysis/missing_phase.json"));
+  EXPECT_EQ(status, ConfigParseStatus::UnknownPhase);
+}

test/unit/unit_configs/reactions/photolysis/bad_reaction_component.json

@@ -0,0 +1,39 @@
+{
+  "version": "1.0.0",
+  "name": "Bad reaction component",
+  "species": [
+    {
+      "name": "A"
+    },
+    {
+      "name": "B"
+    }
+  ],
+  "phases": [
+    {
+      "name": "gas",
+      "species": [
+        "A",
+        "B"
+      ]
+    }
+  ],
+  "reactions": [
+    {
+      "type": "PHOTOLYSIS",
+      "gas phase": "gas",
+      "reactants": [
+        {
+          "species name": "A",
+          "Coefficient": 1.2
+        }
+      ],
+      "products": [
+        {
+          "species name": "B",
+          "coefficient": 0.2
+        }
+      ]
+    }
+  ]
+}

test/unit/unit_configs/reactions/photolysis/missing_phase.json

@@ -0,0 +1,34 @@
+{
+  "version": "1.0.0",
+  "name": "Missing phase",
+  "species": [
+    {
+      "name": "A"
+    },
+    {
+      "name": "B"
+    },
+    {
+      "name": "C"
+    }
+  ],
+  "phases": [ ],
+  "reactions": [
+    {
+      "type": "PHOTOLYSIS",
+      "gas phase": "gas",
+      "reactants": [
+        {
+          "species name": "B",
+          "coefficient": 1.2
+        }
+      ],
+      "products": [
+        {
+          "species name": "C",
+          "coefficient": 0.2
+        }
+      ]
+    }
+  ]
+}

test/unit/unit_configs/reactions/photolysis/unknown_species.json

@@ -0,0 +1,39 @@
+{
+  "version": "1.0.0",
+  "name": "Unknown species",
+  "species": [
+    {
+      "name": "A"
+    },
+    {
+      "name": "B"
+    }
+  ],
+  "phases": [
+    {
+      "name": "gas",
+      "species": [
+        "A",
+        "B"
+      ]
+    }
+  ],
+  "reactions": [
+    {
+      "type": "PHOTOLYSIS",
+      "gas phase": "gas",
+      "reactants": [
+        {
+          "species name": "B",
+          "coefficient": 1.2
+        }
+      ],
+      "products": [
+        {
+          "species name": "C",
+          "coefficient": 0.2
+        }
+      ]
+    }
+  ]
+}