- HomeController.ts: addes api method for showing number of publications per month for given year

- adapted command ValidateChecksum.ts: on published files are checked. better information logging
- better LineChart.vue component: showing real statistics
- start/routes/apu.ts: added Route.get('/statistic/:year', 'HomeController.findPublicationsPerMonth');

app/Controllers/Http/Api/HomeController.ts

@@ -53,4 +53,91 @@ export default class HomeController {
             });
         }
     }
+
+    public async findPublicationsPerMonth({ response }: HttpContextContract) {
+        const serverState = 'published';
+        // const year = params.year;
+        // const from = parseInt(year);
+        try {
+
+            // const datasets = await Database.from('documents as doc')
+            //     .select([Database.raw(`date_part('month', server_date_published) as pub_month`), Database.raw('COUNT(*) as count')])
+            //     .where('server_state', serverState)
+            //     .innerJoin('link_documents_persons as ba', 'doc.id', 'ba.document_id')
+            //     .andWhereRaw(`date_part('year', server_date_published) = ?`, [from])
+            //     .groupBy('pub_month');
+            //     // .orderBy('server_date_published');
+
+            const years = [2021, 2022, 2023]; // Add the second year
+
+            const result = await Database.from('documents as doc')
+                .select([
+                    Database.raw(`date_part('year', server_date_published) as pub_year`),
+                    Database.raw(`date_part('month', server_date_published) as pub_month`),
+                    Database.raw('COUNT(*) as count'),
+                ])
+                .where('server_state', serverState)
+                // .innerJoin('link_documents_persons as ba', 'doc.id', 'ba.document_id')
+                // .whereIn('pub_year', years) // Filter by both years
+                .whereRaw(`date_part('year', server_date_published) IN (${years.join(',')})`) // Filter by both years
+                .groupBy('pub_year', 'pub_month')
+                .orderBy('pub_year', 'asc')
+                .orderBy('pub_month', 'asc');
+                            
+            const labels = Array.from({ length: 12 }, (_, i) => i + 1); // Assuming 12 months
+
+            const inputDatasets: Map<string, ChartDataset> = result.reduce((acc, item) => {
+                const { pub_year, pub_month, count } = item;
+
+                if (!acc[pub_year]) {
+                    acc[pub_year] = {
+                        data: Array.from({ length: 12 }).fill(0),
+                        label: pub_year.toString(),
+                        borderColor: this.getRandomHexColor, // pub_year === 2022 ? '#3e95cd' : '#8e5ea2',
+                        fill: false,
+                    };
+                }
+
+                acc[pub_year].data[pub_month - 1] = parseInt(count);
+
+                return acc ;
+            }, {});
+
+            const outputDatasets = Object.entries(inputDatasets).map(([year, data]) => ({
+                data: data.data,
+                label: year,
+                borderColor: data.borderColor,
+                fill: data.fill
+              }));
+
+            const data = {
+                labels: labels,
+                datasets: outputDatasets,
+            };
+
+            return response.json(data);
+        } catch (error) {
+            return response.status(StatusCodes.INTERNAL_SERVER_ERROR).json({
+                message: error.message || 'Some error occurred while retrieving datasets.',
+            });
+        }
+    }
+
+    private getRandomHexColor() {
+        const letters = '0123456789ABCDEF';
+        let color = '#';
+    
+        for (let i = 0; i < 6; i++) {
+            color += letters[Math.floor(Math.random() * 16)];
+        }
+    
+        return color;
+    }
+}
+interface ChartDataset {
+    data: Array<number>;
+    label: string;
+    borderColor: string;
+    fill: boolean;
+
 }