Add other SOHO sources (#48)

Configuration.js

@@ -142,6 +142,18 @@ class Config {
          * Sources IDs that should be rendered on a plane rather than a hemisphere
          */
         this.plane_sources = [4, 5, 28, 29];
+
+        /**
+         * Base image sizes, needed to make sure we query the correct resolution
+         * If a source is not specified, then the next source going down is used. For example, 9 through 19 are not listed because they all use the same source as 8.
+         */
+        this.source_resolutions = {
+            0: 1024,  // 0 - 7   are 1024
+            8: 4096,  // 8 - 19  are 4096
+            20: 2048, // 20 - 23 are 2048
+            28: 512,  // 28       is 512 
+            29: 2048  // 29       is 2048
+        };
     }
 
     /**

common/resolution_lookup.js

@@ -1,26 +1,19 @@
-function _inclusive_between(value, min, max) {
-    return (min <= value) && (value <= max);
-}
+import Config from "../Configuration.js";
 
-function _GetBaseImageResolution(source_id) {
-    if (_inclusive_between(source_id, 8, 19)) {
-        // SDO Images are between source IDs 8 to 19.
-        // These images are 4k in size
-        return 4096;
-    } else if (_inclusive_between(source_id, 4, 5)) {
-        // SOHO LASCO images are 1024x1024 in size. These IDs are 4 and 5
-        return 1024;
-    } else if (_inclusive_between(source_id, 20, 23) || (source_id == 29)) {
-        return 2048;
-    } else if (_inclusive_between(source_id, 28, 29)) {
-        return 512;
+function _GetResolutionIndex(source_id) {
+    if (Config.source_resolutions.hasOwnProperty(source_id)) {
+        return source_id;
     } else {
-        // By default assume 4096. This may result in bad scaling if it's not correct.
-        console.log("Source ID " + source_id + " not defined in resolution lookup table, please notify the developers to add it.");
-        return 4096;
+        // Get the index for the ID below this one.
+        return _GetResolutionIndex(source_id - 1);
     }
 }
 
+function _GetBaseImageResolution(source_id) {
+    let idx = _GetResolutionIndex(source_id);
+    return Config.source_resolutions[idx];
+}
+
 /**
  * Returns the appropriate Image Scale given a resolution choice and Source ID
  * @param {number} resolution Resolution in pixels square.

index.html

@@ -35,6 +35,12 @@
                 <option value="19">SDO HMI Mag</option>
                 <option value="4">SOHO LASCO C2</option>
                 <option value="5">SOHO LASCO C3</option>
+                <option value="0">SOHO EIT 171</option>
+                <option value="1">SOHO EIT 195</option>
+                <option value="2">SOHO EIT 284</option>
+                <option value="3">SOHO EIT 304</option>
+                <option value="7">SOHO MDI Continuum</option>
+                <option value="6">SOHO MDI Magnetogram</option>
                 <option value="20">STEREO-A EUVI-A 171</option>
                 <option value="21">STEREO-A EUVI-A 195</option>
                 <option value="22">STEREO-A EUVI-A 284</option>