thodarkuri 1.0.2
Generic Recursive Template Engine for Parsing and Filling

# ThodarKuri (Generic Recursive Template Engine)

- A Generic Recursive Template Engine which generates a JSON/Dictionary which can be edited from the code and then the same values can be filled in the tesmplates to write them as new variants of the template.
- Check out the example code in repo ( https://github.com/Palani-SN/ThodarKuri ) for reference

## Template commands to be used (only 3 statements)

- Command 1 : adds the key *Title* to the current dict with value *None*

```
R[Title] 
```
	
- Command 2 : adds the key *Plot* to the current dict with value **as dict** of file *template_plot.html*

```
R[Plot] => template_plot.html
``` 

- Command 3 : adds the key *Bar* to the current dict with value **as list of dict** of file *template_bar.html*

```
( R[Bar] => template_bar.html )*
``` 

## Parser

- Generate a Skeleton of type Dictionary/JSON from a specified entrypoint
- Sample usage of the file is as given below (Refer html_plot - SR1 for template examples in EXAMPLES folder)

```python
from ThodarKuri.Parser import ParserTemplateEngine
import json
 
Parser = ParserTemplateEngine();
Settings = Parser.ParseEntryPoint("html_plot - SR1/template_index.html");

print(json.dumps(Settings, sort_keys=True, indent=4));
```
- **Note : Template files to be placed in the same folder path for use**

![](https://github.com/Palani-SN/ThodarKuri/blob/main/TemplatesSpecification.PNG?raw=true)

```output
{
    "Plot": {
        "Bar": [
            {
                "description": null,
                "name": null,
                "size": null
            }
        ],
        "Plot_Description": null,
        "Plot_Orientation": null
    },
    "Title": null
}
```

### ParserTemplateEngine (class from Parser.py)

- Initialising class helps to configure the RegexEdges and it also validates the pattern based on the second parameter FuncCallTemplate
- Arguments
  - Arg1 - RegexEdges (a tuple with start and end delimiters)
  - Arg2 - FuncCallTemplate is the sample string with "self.FUNC_CALL()" keyword to validate the RegexEdges
- Sample regex configurations in ParserTemplateEngine Initialisation is shown below

```python
## Default RegexEdges=("{{", "}}"),
## FuncCallTemplate="{{self.FUNC_CALL()}}"
TE1 = ParserTemplateEngine();

## RegexEdges=("_StArT_", "_eNd_"),
## FuncCallTemplate="_StArT_self.FUNC_CALL()_eNd_"
TE2 = ParserTemplateEngine(("_StArT_", "_eNd_"), "_StArT_self.FUNC_CALL()_eNd_");

## RegexEdges=("<<", ">>"),
## FuncCallTemplate="<<self.FUNC_CALL()>>"
TE3 = ParserTemplateEngine(("<<", ">>"), "<<self.FUNC_CALL()>>");

## RegexEdges=("\\[\\[", "\\]\\]"),
## FuncCallTemplate="[[self.FUNC_CALL()]]"
TE4 = ParserTemplateEngine(("\\[\\[", "\\]\\]"), "[[self.FUNC_CALL()]]");

## RegexEdges=("{\\[<{\\[", "}\\]>}\\]"),
## FuncCallTemplate="{[<{[self.FUNC_CALL()}]>}]"
TE5 = ParserTemplateEngine(("{\\[<{\\[", "}\\]>}\\]"), "{[<{[self.FUNC_CALL()}]>}]");
```
#### ParseEntryPoint()

- Parses the template Name/Path and file Name/Path.
- Returns the differences between them as a dict.

```python
## Definition
def ParseEntryPoint(self, TemplateName, DebugTokens = False):
```
- Arguments
  - Arg 1 - TemplateName (Name of the EntryPoint template to be edited)
  - Arg 2 - DebugTokens (If True prints the return Dict, If false doesnt print)
- Returns 
  - Dict - the result as a dictionary (keys and default values like a schema: Return_values)

## Filler

- To be used to fill a template from code using JSON skeleton/Dictionary that is parsed using parser class and EntryPoint template
- Sample usage of the file is as given below (Refer html_plot - SR1 for template examples in EXAMPLES folder)

```python
from ThodarKuri.Filler import FillerTemplateEngine
import json

SettingsAsJson = """
{
    "Plot": {
        "Bar": [
            {
                "description": "African Caribbean in Barbados",
                "name": "1000GENOMES:phase_3:ACB",
                "size": 96
            },
            {
                "description": "African Ancestry in Southwest US",
                "name": "1000GENOMES:phase_3:ASW",
                "size": 61
            },
            {
                "description": "Bengali in Bangladesh",
                "name": "1000GENOMES:phase_3:BEB",
                "size": 86
            },
            {
                "description": "Chinese Dai in Xishuangbanna, China",
                "name": "1000GENOMES:phase_3:CDX",
                "size": 93
            },
            {
                "description": "Utah residents with Northern and Western European ancestry",
                "name": "1000GENOMES:phase_3:CEU",
                "size": 99
            },
            {
                "description": "Colombian in Medellin, Colombia",
                "name": "1000GENOMES:phase_3:CLM",
                "size": 94
            },
            {
                "description": "Esan in Nigeria",
                "name": "1000GENOMES:phase_3:ESN",
                "size": 99
            },
            {
                "description": "Finnish in Finland",
                "name": "1000GENOMES:phase_3:FIN",
                "size": 99
            },
            {
                "description": "British in England and Scotland",
                "name": "1000GENOMES:phase_3:GBR",
                "size": 91
            },
            {
                "description": "Kinh in Ho Chi Minh City, Vietnam",
                "name": "1000GENOMES:phase_3:KHV",
                "size": 99
            },
            {
                "description": "Luhya in Webuye, Kenya",
                "name": "1000GENOMES:phase_3:LWK",
                "size": 99
            },
            {
                "description": "Mende in Sierra Leone",
                "name": "1000GENOMES:phase_3:MSL",
                "size": 85
            },
            {
                "description": "Mexican Ancestry in Los Angeles, California",
                "name": "1000GENOMES:phase_3:MXL",
                "size": 64
            },
            {
                "description": "Peruvian in Lima, Peru",
                "name": "1000GENOMES:phase_3:PEL",
                "size": 85
            },
            {
                "description": "Punjabi in Lahore, Pakistan",
                "name": "1000GENOMES:phase_3:PJL",
                "size": 96
            }
        ],
        "Plot_Description": "Horizontal Bar Chart",
        "Plot_Orientation": "horizontal"
    },
    "Title": "Template Engine Demo"
}
"""

settings = json.loads(SettingsAsJson)

Filler = FillerTemplateEngine();
FilledString = Filler.FillEntryPoint(Settings, "html_plot - SR1/template_index.html", "html_plot - SR1/index.html");
```

- The Output of the above code looks as follows

![](https://github.com/Palani-SN/ThodarKuri/blob/main/FilledFile.PNG?raw=true)

### FillerTemplateEngine (class from Filler.py)

- Initialising class helps to configure the RegexEdges and it also validates the pattern based on the second parameter FuncCallTemplate
- Arguments
  - Arg1 - RegexEdges (a tuple with start and end delimiters)
  - Arg2 - FuncCallTemplate is the sample string with "self.FUNC_CALL()" keyword to validate the RegexEdges
- Sample regex configurations in FillerTemplateEngine Initialisation is shown below.

```python
## Default RegexEdges=("{{", "}}"),
## FuncCallTemplate="{{self.FUNC_CALL()}}"
TE1 = FillerTemplateEngine();

## RegexEdges=("_StArT_", "_eNd_"),
## FuncCallTemplate="_StArT_self.FUNC_CALL()_eNd_"
TE2 = FillerTemplateEngine(("_StArT_", "_eNd_"), "_StArT_self.FUNC_CALL()_eNd_");

## RegexEdges=("<<", ">>"),
## FuncCallTemplate="<<self.FUNC_CALL()>>"
TE3 = FillerTemplateEngine(("<<", ">>"), "<<self.FUNC_CALL()>>");

## RegexEdges=("\\[\\[", "\\]\\]"),
## FuncCallTemplate="[[self.FUNC_CALL()]]"
TE4 = FillerTemplateEngine(("\\[\\[", "\\]\\]"), "[[self.FUNC_CALL()]]");

## RegexEdges=("{\\[<{\\[", "}\\]>}\\]"),
## FuncCallTemplate="{[<{[self.FUNC_CALL()}]>}]"
TE5 = FillerTemplateEngine(("{\\[<{\\[", "}\\]>}\\]"), "{[<{[self.FUNC_CALL()}]>}]");
```
#### FillEntryPoint()

- Gets the Template Name/Path of the template function calls that is going to be used.
- Will initialize the MapDict for updating the function calls in the template.

```python
## Definition
def FillEntryPoint(self, MapDict, TemplateName, FileName = None, DebugTokens = False):
```
- Arguments
  - Arg1 - MapDict (a dict that contains the key of the template to be filled with the value)
  - Arg2 - TemplateName (Entry Point Template name which needs to be edited)
  - Arg3 - FileName (New file name which needs to be created with the filled content)
  - Arg4 - DebugTokens (If True prints the return str, If false doesnt print)
- Returns 
  - Str - string created by dictionary values recursively filled in the template string