init

composer.json

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+{
+    "name": "at-lab/chartisan-port",
+    "description": "Chartisan's PHP backend",
+    "license": "MIT",
+    "type": "library",
+    "authors": [
+        {
+            "name": "Èrik Campobadal Forés",
+            "email": "soc@erik.cat"
+        }
+    ],
+    "minimum-stability": "dev",
+    "require": {
+        "php": ">=7.4"
+    },
+    "autoload": {
+        "psr-4": {
+            "Chartisan\\PHP\\": "src/"
+        }
+    }
+}

example/.gitignore

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+/vendor/*

example/Makefile

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+all:
+	php -S 127.0.0.1:9000 -t public/

example/app.php

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+<?php
+
+declare(strict_types = 1);
+
+use Chartisan\PHP\Chartisan;
+
+/**
+ * Outputing JSON encoded data and
+ * the CORS headers.
+ */
+header('Content-Type: application/json');
+header('Access-Control-Allow-Origin: *');
+
+/**
+ * Main application entry point.
+ */
+return fn (): string => Chartisan::build()
+    ->labels(['a', 'b', 'c'])
+    ->dataset('Sample 1', [1, 2 ,3])
+    ->dataset('Sample 2', [3, 2 ,1])
+    ->toJSON();

example/composer.json

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+{
+    "type": "project",
+    "repositories": [
+        {
+            "type": "path",
+            "url": "../",
+            "options": {
+                "symlink": true
+            }
+        }
+    ],
+    "autoload": {
+        "psr-4": {
+            "Chartisan\\PHP\\": "../src"
+        }
+    }
+}

example/public/index.php

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+<?php
+
+declare(strict_types = 1);
+
+/**
+ * Register the auto loader.
+ */
+require __DIR__ . '/../vendor/autoload.php';
+
+/**
+ * Get the application response.
+ */
+$response = require_once __DIR__ . '/../app.php';
+
+/**
+ * Respond to the request.
+ */
+echo $response();

src/ChartData.php

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+<?php
+
+declare(strict_types = 1);
+
+namespace Chartisan\PHP;
+
+/**
+ * Represents the chart information.
+ */
+class ChartData
+{
+    /**
+     * Stores the chart labels.
+     *
+     * @var string[]
+     */
+    public array $labels = [];
+
+    /**
+     * Stores the extra information of the chart if needed.
+     *
+     * @var array|null
+     */
+    public ?array $extra = null;
+}

src/Chartisan.php

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+<?php
+
+declare(strict_types = 1);
+
+namespace Chartisan\PHP;
+
+/**
+ * Represents a chartisan chart instance.
+ */
+class Chartisan
+{
+    /**
+     * Stores the server data of the chart.
+     *
+     * @var ServerData
+     */
+    protected ServerData $serverData;
+
+    /**
+     * Creates a new instance of a chartisan chart.
+     *
+     * @param ServerData $serverData
+     */
+    public function __construct(ServerData $serverData)
+    {
+        $this->serverData = $serverData;
+    }
+
+    /**
+     * Creates a new instance of a chartisan chart.
+     *
+     * @return Chartisan
+     */
+    public static function build(): Chartisan
+    {
+        return new Chartisan(new ServerData);
+    }
+
+    /**
+     * Sets the chart labels.
+     *
+     * @param string[] $labels
+     * @return Chartisan
+     */
+    public function labels(array $labels): Chartisan
+    {
+        $this->serverData->chart->labels = $labels;
+        return $this;
+    }
+
+    /**
+     * Adds extra information to the chart.
+     *
+     * @param array $value
+     * @return Chartisan
+     */
+    public function extra(array $value): Chartisan
+    {
+        $this->serverData->chart->extra = $value;
+        return $this;
+    }
+
+    /**
+     * AdvancedDataset appends a new dataset to the chart or modifies an existing one.
+     * If the ID has already been used, the dataset will be replaced with this one.
+     *
+     * @param string $name
+     * @param array $values
+     * @param array|null $extra
+     * @return Chartisan
+     */
+    public function advancedDataset(string $name, array $values, ?array $extra): Chartisan
+    {
+        $dataset = $this->getDataset($name);
+        if ($dataset) {
+            $dataset->name = $name;
+            $dataset->values = $values;
+            $dataset->extra = $extra;
+        } else {
+            $this->serverData->datasets[] = new DatasetData($name, $values, $extra);
+        }
+        return $this;
+    }
+
+    /**
+     * Dataset adds a new simple dataset to the chart. If more advanced control is
+     * needed, consider using `AdvancedDataset` instead.
+     *
+     * @param string $name
+     * @param array $values
+     * @return Chartisan
+     */
+    public function dataset(string $name, array $values): Chartisan
+    {
+        return $this->advancedDataset($name, $values, null);
+    }
+
+    /**
+     * Returns the string representation JSON encoded.
+     *
+     * @return string
+     */
+    public function toJSON(): string
+    {
+        return json_encode($this->toObject());
+    }
+
+    /**
+     * Transforms it to an object.
+     *
+     * @return ServerData
+     */
+    public function toObject(): ServerData
+    {
+        return $this->serverData;
+    }
+
+    /**
+     * Gets the dataset with the given name.
+     *
+     * @param string $name
+     * @return ServerData|null
+     */
+    protected function getDataset(string $name): ?DatasetData
+    {
+        foreach ($this->serverData->datasets as $dataset) {
+            if ($dataset->name == $name) {
+                return $dataset;
+            }
+        }
+        return null;
+    }
+}

src/DatasetData.php

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+<?php
+
+declare(strict_types = 1);
+
+namespace Chartisan\PHP;
+
+/**
+ * Represents the dataset information.
+ */
+class DatasetData
+{
+    /**
+     * Stores the dataset name.
+     *
+     * @var string
+     */
+    public string $name;
+
+    /**
+     * Stores the dataset values.
+     *
+     * @var array[float]
+     */
+    public array $values;
+
+    /**
+     * Stores the dataset extra information if needed.
+     *
+     * @var ?array
+     */
+    public ?array $extra;
+
+    /**
+     * Creates a new instance of DatasetData.
+     *
+     * @param string $name
+     * @param array $values
+     * @param array|null $extra
+     */
+    public function __construct(string $name, array $values, ?array $extra)
+    {
+        $this->name = $name;
+        $this->values = $values;
+        $this->extra = $extra;
+    }
+}

src/ServerData.php

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+<?php
+
+declare(strict_types = 1);
+
+namespace Chartisan\PHP;
+
+/**
+ * ServerData represents how the server is expected
+ * to send the data to the chartisan client.
+ */
+class ServerData
+{
+    /**
+     * Stores the chart information.
+     *
+     * @var ChartData
+     */
+    public ChartData $chart;
+
+    /**
+     * Stores the datasets of the chart.
+     *
+     * @var DatasetData[]
+     */
+    public array $datasets = [];
+
+    /**
+     * Creates a new instance of a server data.
+     */
+    public function __construct()
+    {
+        $this->chart = new ChartData;
+    }
+}