Files
metabuilder/workflow/plugins/mojo/string/string_concat/string_concat.mojo
johndoe6345789 7ce8b4ae8a refactor(workflow): convert all plugins to class/struct + factory pattern
- Python: class extending NodeExecutor + factory.py (80+ plugins)
- TypeScript: class implements NodeExecutor + factory.ts (7 groups, 116 classes)
- Go: struct with methods + factory.go (36 plugins)
- Rust: struct impl NodeExecutor trait + factory.rs (54 plugins)
- Mojo: struct + factory.mojo (11 plugins)

All package.json files now include:
- files array listing source files
- metadata.class/struct field
- metadata.entrypoint field

This enables a unified plugin loading system across all languages
with no import side effects (Spring-style DI pattern).

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
2026-01-22 14:53:04 +00:00

65 lines
2.0 KiB
Mojo

"""Workflow plugin: concatenate strings.
Concatenates multiple strings together with an optional separator.
Input: {"strings": ["Hello", "World"], "separator": " "}
Output: {"result": "Hello World"}
"""
from collections import Dict
from python import PythonObject
struct StringConcat:
"""Plugin that concatenates multiple strings with an optional separator."""
var node_type: String
var category: String
var description: String
fn __init__(inout self):
"""Initialize the StringConcat plugin."""
self.node_type = "string.concat"
self.category = "string"
self.description = "Concatenate multiple strings with optional separator"
fn execute(self, inputs: Dict[String, PythonObject], runtime: PythonObject = PythonObject(None)) -> Dict[String, PythonObject]:
"""Concatenate multiple strings with an optional separator.
Args:
inputs: Dictionary containing:
- "strings": List of strings to concatenate
- "separator": Optional separator string (default: "")
runtime: Optional runtime context (unused).
Returns:
Dictionary with "result" key containing the concatenated string.
"""
var strings = inputs.get("strings", PythonObject([]))
var separator = String(inputs.get("separator", PythonObject("")))
var output = Dict[String, PythonObject]()
var length = len(strings)
if length == 0:
output["result"] = PythonObject("")
return output
var result = String(strings[0])
for i in range(1, length):
result += separator + String(strings[i])
output["result"] = PythonObject(result)
return output
fn main():
"""Test the concat plugin."""
var plugin = StringConcat()
var inputs = Dict[String, PythonObject]()
inputs["strings"] = PythonObject(["Hello", "World"])
inputs["separator"] = PythonObject(" ")
var result = plugin.execute(inputs)
print("Concatenated:", result["result"]) # Expected: "Hello World"