feat: Model templates for color radios (update SD card for bundled templates) (#1569)

* Model templates - select and load after Create Model for color radios

* Model templates - save model as template, only for color radios

* Small fix to drawTextLines(...) to handle consecutive spaces

* Change title of button for empty template folder

* I found out why "no trailing slash = important" in path names!

* Reworked file and path name string manipulation
No longer using chdir, as Lua scripts etc. could be messing with the working dir
Use buffers more and std::string less

* Adjusting the size of buffers
I think that I got it right now. Really hard to figure out the right size constants!
Also added storageDirty(EE_MODEL) after reading the template file and renaming the model

* Added storage checks

* Slight simplification - all template buttons are similar

* Added "Blank Model" button

* Wizard Lua script
If there is a Lua script with the same name as the template file in the folder, then it is run after reading the template.

radio/src/storage/sdcard_common.cpp

@@ -29,11 +29,12 @@
 // defined either in sdcard_raw.cpp or sdcard_yaml.cpp
 void storageCreateModelsList();
 
-void getModelPath(char * path, const char * filename)
+void getModelPath(char * path, const char * filename, const char* pathName)
 {
-  strcpy(path, STR_MODELS_PATH);
-  path[sizeof(MODELS_PATH)-1] = '/';
-  strcpy(&path[sizeof(MODELS_PATH)], filename);
+  unsigned int len = strlen(pathName);
+  strcpy(path, pathName);
+  path[len] = '/';
+  strcpy(&path[len + 1], filename);
 }
 
 void storageEraseAll(bool warn)
@@ -142,6 +143,26 @@ const char* loadModel(char* filename, bool alarms)
   return nullptr;
 }
 
+const char* loadModelTemplate(const char* fileName, const char* filePath)
+{
+  preModelLoad();
+  // Assuming that the template is located in current working directory
+  const char* error = readModel(fileName, (uint8_t*)&g_model, sizeof(g_model), filePath);
+  if (error) {
+    TRACE("loadModel error=%s", error);
+    // just get some clean memory state in "g_model" so the mixer can run safely
+    memset(&g_model, 0, sizeof(g_model));
+    applyDefaultTemplate();
+
+    storageCheck(true);
+    postModelLoad(false);
+    return error;
+  }
+
+  postModelLoad(false);
+  return nullptr;
+}
+
 void storageReadAll()
 {
   TRACE("storageReadAll");

radio/src/storage/sdcard_common.h

@@ -23,6 +23,7 @@
 #define _SDCARD_COMMON_H_
 
 #include "ff.h"
+#include "translations.h"
 
 #define DEFAULT_CATEGORY "Models"
 
@@ -54,10 +55,11 @@ const char *loadFileBin(const char *fullpath, uint8_t *data,
 struct YamlNode;
 const char* writeFileYaml(const char* path, const YamlNode* root_node, uint8_t* data);
 
-void getModelPath(char * path, const char * filename);
+void getModelPath(char * path, const char * filename, const char* pathName = STR_MODELS_PATH);
 
-const char * readModel(const char * filename, uint8_t * buffer, uint32_t size);
+const char * readModel(const char * filename, uint8_t * buffer, uint32_t size, const char* pathName = STR_MODELS_PATH);
 const char * loadModel(char * filename, bool alarms=true);
+const char * loadModelTemplate(const char* fileName, const char* filePath);
 const char * createModel();
 const char * writeModel();
 

radio/src/storage/sdcard_yaml.cpp

@@ -196,7 +196,7 @@ const char * writeGeneralSettings()
 }
 
 
-const char * readModelYaml(const char * filename, uint8_t * buffer, uint32_t size)
+const char * readModelYaml(const char * filename, uint8_t * buffer, uint32_t size, const char* pathName)
 {
     // YAML reader
     TRACE("YAML model reader");
@@ -216,7 +216,7 @@ const char * readModelYaml(const char * filename, uint8_t * buffer, uint32_t siz
     }
     
     char path[256];
-    getModelPath(path, filename);
+    getModelPath(path, filename, pathName);
 
     YamlTreeWalker tree;
     tree.reset(data_nodes, buffer);
@@ -247,14 +247,14 @@ const char * readModelYaml(const char * filename, uint8_t * buffer, uint32_t siz
 
 static const char _wrongExtentionError[] = "wrong file extension";
 
-const char* readModel(const char* filename, uint8_t* buffer, uint32_t size)
+const char* readModel(const char* filename, uint8_t* buffer, uint32_t size, const char* pathName)
 {
   const char* ext = strrchr(filename, '.');
   if (!ext || strncmp(ext, YAML_EXT, 4) != 0) {
     return _wrongExtentionError;
   }
 
-  return readModelYaml(filename, buffer, size);
+  return readModelYaml(filename, buffer, size, pathName);
 }
 
 const char * writeModelYaml(const char* filename)

radio/src/storage/sdcard_yaml.h

@@ -24,5 +24,5 @@ constexpr uint8_t MODELIDX_STRLEN = sizeof(MODEL_FILENAME_PREFIX "00");
 
 const char * loadRadioSettingsYaml();
 const char * writeModelYaml(const char* filename);
-const char * readModelYaml(const char * filename, uint8_t * buffer, uint32_t size);
+const char * readModelYaml(const char * filename, uint8_t * buffer, uint32_t size, const char* pathName = STR_MODELS_PATH);
 void getModelNumberStr(uint8_t idx, char* model_idx);