New base code for mempool blockchain explorerer

frontend/src/app/components/address-labels/address-labels.component.ts

@@ -0,0 +1,60 @@
+import { Component, OnInit, ChangeDetectionStrategy, Input } from '@angular/core';
+import { Vin, Vout } from '../../interfaces/electrs.interface';
+
+@Component({
+  selector: 'app-address-labels',
+  templateUrl: './address-labels.component.html',
+  styleUrls: ['./address-labels.component.scss'],
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class AddressLabelsComponent implements OnInit {
+
+  @Input() vin: Vin;
+  @Input() vout: Vout;
+
+  multisig = false;
+  multisigM: number;
+  multisigN: number;
+
+  constructor() { }
+
+  ngOnInit() {
+    if (this.vin) {
+      this.handleVin();
+    } else if (this.vout) {
+      this.handleVout();
+    }
+  }
+
+  handleVin() {
+    if (this.vin.inner_witnessscript_asm && this.vin.inner_witnessscript_asm.indexOf('OP_CHECKMULTISIG') > -1) {
+      const matches = this.getMatches(this.vin.inner_witnessscript_asm, /OP_PUSHNUM_([0-9])/g, 1);
+      this.multisig = true;
+      this.multisigM = matches[0];
+      this.multisigN = matches[1];
+    }
+
+    if (this.vin.inner_redeemscript_asm && this.vin.inner_redeemscript_asm.indexOf('OP_CHECKMULTISIG') > -1) {
+      const matches = this.getMatches(this.vin.inner_redeemscript_asm, /OP_PUSHNUM_([0-9])/g, 1);
+      this.multisig = true;
+      this.multisigM = matches[0];
+      this.multisigN = matches[1];
+    }
+  }
+
+  handleVout() {
+  }
+
+  getMatches(str: string, regex: RegExp, index: number) {
+    if (!index) {
+      index = 1;
+    }
+    const matches = [];
+    let match;
+    while (match = regex.exec(str)) {
+      matches.push(match[index]);
+    }
+    return matches;
+  }
+
+}